# NTSB DCA96MA068: McDonnell Douglas MD-88, N927DA, Pensacola, FL, July 6, 1996

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 1 · Major · Final report
- Date: July 6, 1996, 14:24 local (19:24 UTC)
- Place: Pensacola, FL
- Coordinates: 30.470479, -87.190536 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.4705&lon=-87.1905&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal, 2 serious, 3 minor, 137 uninjured
- Status: Completed, report March 31, 1998
- Report: Board-adopted at Board Meeting
- Investigation class: Class 1
- NTSB office: Major Investigations Division
- Safety recommendations: Yes
- NTSB case key (mKey): 11010
- NTSB case page: https://www.ntsb.gov/investigations/Pages/DCA96MA068.aspx
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/11010/pdf
- Board report AAR9801 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR9801.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=11010
- Page: https://openairdocs.org/ntsb/DCA96MA068

## Probable cause

the fracture of the left engine's front compressor fan hub, which resulted from the failure of Delta Air Lines' fluorescent penetrant inspection process to detect a detectable fatigue crack initiating from an area of altered microstructure that was created during the drilling process by Volvo for Pratt & Whitney and that went undetected at the time of manufacture. Contributing to the accident was the lack of sufficient redundancy in the in-service inspection program. (NTSB Report AAR-98/01)

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - mech failure/malf, takeoff - roll/run
  - 1 engine
  - compressor assembly,rotor disc - fatigue (cause)
  - maintenance,inspection - inadequate, company maintenance personnel (cause)
  - compressor assembly,rotor disc - fractured (cause)
  - compressor assembly,rotor disc - separation
- Miscellaneous/other, takeoff - roll/run
  - misc,engine uncontained failure
  - fuselage,cabin - foreign object damage

## Analysis

During the initial part of its takeoff roll, the airplane experienced an engine failure. Uncontained engine debris from the front compressor front hub (fan hub) of the #1 (left) engine penetrated the left aft fuselage. Two passengers were killed and two others were seriously injured. The takeoff was rejected, and the airplane was stopped on the runway. The fan hub had fractured through a tierod hole and blade slot. Some form of drill breakage or drill breakdown, combined with localized loss of coolant and chip packing, had occurred during the drilling process, creating an altered microstructure and ladder cracking in the fan hub. Drilling damage extended much deeper into hole sidewall material than previously anticipated by P & W. Fatigue cracks initiated from the ladder cracking in the tierod hole and began propagating almost immediately after the hub was put into service in 1990. The crack was large enough to have been detectable during the last fluorescent penetrant inspection at Delta. Delta's nondetection of the crack was caused either by a failure of the cleaning and fluorescent penetrant inspection processing, a failure of the inspector to detect the crack, or some combination of these factors.

## Factual narrative

On July 6, 1996, Delta Airlines flight 1288, an MD-88, N927DA, experienced an uncontained failure of the left engine during the beginning of the takeoff roll.  The flightcrew stopped the airplane about 1400 feet down the takeoff runway.  On board the airplane were 137 passengers, 2 flightcrew members, 3 cabincrew, and 2 non-revenue Delta employees occupying the cockpit and aft jumpseats.  Engine parts entered the left side of the aft cabin resulting in 2 passengers sustaining fatal injuries and 2 sustained major injuries.  Three other passengers received minor injuries during the evacuation.  The captain stopped the evacuation from the emergency exits, and an airstair was brought to the airplane to evacuate the remaining passengers and the crew.  The fan hub for the left engine was found fractured.

## Aircraft

- Registration: [N927DA](https://openairdocs.org/deregistered/N927DA-2019-04-08), registration cancelled 2019-04-08, S/N 49714, built 1988 (OpenAirDocs)
- Reported make and model: McDonnell Douglas MD-88
- Registry model: [Mcdonnell Douglas MD-88](https://openairdocs.org/model/mcdonnell-douglas-md-88) (registry code 3023688) (OpenAirDocs)
- Registry engine: [Pratt & Whitney JT8D series](https://openairdocs.org/engine/pratt-whitney-jt8d-series) (registry code 52053, turbo-jet) (OpenAirDocs)
- Category: Airplane
- Serial number: 49714
- Airframe hours: 22031
- Engines: P&W JT8D-219 21000 lbs thrust turbo jet
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Part 121
- Registered owner: Delta Air Lines Inc
- Airworthiness certificate: Standard, Transport
- Departed: PNS
- Destination: ATL, ATLANTA, GA
- Flight plan: IFR
- Airport: PNS, Pensacola Regional, runway 17, 7,002 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; airline transport; airplane ratings: multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 12,000 total, 2,300 in this make and model, 142 in the last 90 days, 39 in the last 30 days
- Co-pilot; age 37; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; seat: right; toxicology performed

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 12 knots
- Visibility: 7 statute miles
- Temperature: 90 °F, dew point 77 °F
- Altimeter: 29.00 inHg
- Observed at: PNS

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19960706016239A](https://openairdocs.org/incident/19960706016239A), Jul 6, 1996: Doug MD88, Pensacola, FL, Substantial damage, 2 fatal. During teh initial part of its takeoff roll, the airplane experienced an engine failure. Uncontained engine degris from the front compressor front hub (fan…

## Docket (183 files)

The files NTSB released with the investigation on March 25, 1997, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=11010. 94.6 MB in all.

- Ordering of Hearing: 1A (item 1, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469506&FileExtension=.PDF&FileName=Ordering%20of%20Hearing%3A%201A-Master.PDF
- Notice of Designation of Chairman of Board of Inquiry: 1B (item 2, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469507&FileExtension=.PDF&FileName=Notice%20of%20Designation%20of%20Chairman%20of%20Board%20of%20Inquiry%3A%201B-Master.PDF
- Designation of Hearing Officer: 1C (item 3, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469508&FileExtension=.PDF&FileName=Designation%20of%20Hearing%20Officer%3A%201C-Master.PDF
- Designation of Parties to the Hearing: 1D (item 4, .PDF, 60 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469509&FileExtension=.PDF&FileName=Designation%20of%20Parties%20to%20the%20Hearing%3A%201D-Master.PDF
- Notice of Hearing: 1E (item 5, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469510&FileExtension=.PDF&FileName=Notice%20of%20Hearing%3A%201E-Master.PDF
- Operations 2 -Exhibit No. 2A - Group Chairman Factual Report - Operational Factors/Human Performance (item 6, .PDF, 384 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469511&FileExtension=.PDF&FileName=Operations%202%20-Exhibit%20No.%202A%20-%20%20Group%20Chairman%20Factual%20Report%20-%20Operational%20Factors%2FHuman%20Performance-Master.PDF
- Operations 2 - Attachment 1 - Log of Aircraft N927DA Movement (item 7, .PDF, 117 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065348&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%201%20-%20Log%20of%20Aircraft%20N927DA%20Movement-Master.PDF
- Operations 2 - Attachment 2 - Copy of Pilot's Trip Sequence (item 8, .PDF, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065349&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%202%20-%20Copy%20of%20Pilot%27s%20Trip%20Sequence-Master.PDF
- Operations 2 - Attachment 3 - Copies of DL 1288 Flight Papers and Weight & Balance (item 9, .PDF, 665 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469512&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%203%20-%20Copies%20of%20DL%201288%20Flight%20Papers%20and%20Weight%20%26%20Balance-Master.PDF
- Operations 2 - Attachment 4 - Aircraft Emergency Equipment and Seat Location (item 10, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065351&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%204%20-%20Aircraft%20Emergency%20Equipment%20and%20Seat%20Location-Master.PDF
- Operations 2 - Attachment 5 - Copy of ACARS Log (item 11, .PDF, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065352&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%205%20-%20Copy%20of%20ACARS%20Log-Master.PDF
- Operations 2 - Attachment 6 - Copy of Engine Instruments and Operating Parameters (item 12, .PDF, 281 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065353&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%206%20-%20Copy%20of%20Engine%20Instruments%20and%20Operating%20Parameters-Master.PDF
- Operations 2 - Attachment 7 - Copy of Normal Takeoff Procedures (item 13, .PDF, 73 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065354&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%207%20-%20Copy%20of%20Normal%20Takeoff%20Procedures-Master.PDF
- Operations 2 - Attachment 8 - Copy of Pilot's Rejected Takeoff Procedures (item 14, .PDF, 119 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065355&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%208%20-%20Copy%20of%20Pilot%27s%20Rejected%20Takeoff%20Procedures-Master.PDF
- Operations 2 - Attachment 9 - Copy of Pilot's Passenger Evacuation Procedures (item 15, .PDF, 147 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065356&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%209%20-%20Copy%20of%20Pilot%27s%20Passenger%20Evacuation%20Procedures-Master.PDF
- Operations 2 - Attachment 10- Emergency Lights, Emergency Exits Location and Operation (item 16, .PDF, 720 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065357&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%2010-%20Emergency%20Lights,%20Emergency%20Exits%20Location%20and%20Operation-Master.PDF
- Operations 2 - Attachment 11- Throttle and Fuel Control Lever Location (item 17, .PDF, 95 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065358&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%2011-%20Throttle%20and%20Fuel%20Control%20Lever%20Location-Master.PDF
- Operations 2 - Attachment 12- Engine Fire Handle Location (item 18, .PDF, 102 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065359&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%2012-%20Engine%20Fire%20Handle%20Location-Master.PDF
- Operations 2 - Attachment 13- Airport Information (item 19, .PDF, 438 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065360&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%2013-%20Airport%20Information-Master.PDF
- Operations 2 - Attachment 14-Air Traffic Control Voice Transcripts (item 20, .PDF, 764 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469513&FileExtension=.PDF&FileName=Operations%202%20-%20Attachment%2014-Air%20Traffic%20Control%20Voice%20Transcripts-Master.PDF
- Survival Factors 6 - Group Chairman Factual Report (item 21, .PDF, 235 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469514&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Group%20Chairman%20Factual%20Report-Master.PDF
- Survival Factors 6 - Attachment A - Crew and Passenger Seats, Restraint Systems, and Safety Appliances (item 22, .PDF, 404 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065363&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20A%20-%20Crew%20and%20Passenger%20Seats,%20Restraint%20Systems,%20and%20Safety%20Appliances-Master.PDF
- Survival Factors 6 - Attachment B - Airplane Cabin Diagram (item 23, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065364&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20B%20-%20Airplane%20Cabin%20Diagram-Master.PDF
- Survival Factors 6 - Attachment C - Photographic Supplement (item 24, .PDF, 476 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065365&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20C%20-%20Photographic%20Supplement-Master.PDF
- Survival Factors 6 - Attachment D - Flight Attendant Interviews (item 25, .PDF, 393 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065366&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20D%20-%20Flight%20Attendant%20Interviews-Master.PDF
- Survival Factors 6 - Attachment E - Passenger and Other Witness Interviews (item 26, .PDF, 237 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469515&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20E%20-%20Passenger%20and%20Other%20Witness%20Interviews-Master.PDF
- Survival Factors 6 - Attachment F - Flight Attendant Training Records (item 27, .PDF, 238 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469516&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20F%20-%20Flight%20Attendant%20Training%20Records-Master.PDF
- Survival Factors 6 - Attachment G - Passenger Safety Briefing Card (item 28, .PDF, 393 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065369&FileExtension=.PDF&FileName=Survival%20Factors%206%20-%20Attachment%20G%20-%20Passenger%20Safety%20Briefing%20Card-Master.PDF
- Structures 7 - Exhibit No. 7A - Group Chairman Factual Report - Structures/Systems (item 29, .PDF, 471 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469517&FileExtension=.PDF&FileName=Structures%207%20-%20Exhibit%20No.%207A%20-%20Group%20Chairman%20Factual%20Report%20-%20Structures%2FSystems-Master.PDF
- Photo 1. N927DA on runway 17 after coming to a stop. The oil streak is visible left of the runway centerline. (item 30, .PDF, 36 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065371&FileExtension=.PDF&FileName=Photo%201.%20%20N927DA%20on%20runway%2017%20after%20coming%20to%20a%20stop.%20%20The%20oil%20streak%20is%20visible%20left%20of%20the%20runway%20centerline.-Master.PDF
- Photo 2. Aerial view showing damage to left fuselage and left engine. (item 31, .PDF, 36 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065372&FileExtension=.PDF&FileName=Photo%202.%20%20Aerial%20view%20showing%20damage%20to%20left%20fuselage%20and%20left%20engine.%20-Master.PDF
- Photo 3. Left fuselage penetration damage. (item 32, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065373&FileExtension=.PDF&FileName=Photo%203.%20%20Left%20fuselage%20penetration%20damage.-Master.PDF
- Photo 4. Left fuselage and engine damage, including fire damage to nacelle. (item 33, .PDF, 42 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065374&FileExtension=.PDF&FileName=Photo%204.%20%20Left%20fuselage%20and%20engine%20damage,%20including%20fire%20damage%20to%20nacelle.-Master.PDF
- Photo 5. Right fuselage exit damage. (item 34, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065375&FileExtension=.PDF&FileName=Photo%205.%20%20Right%20fuselage%20exit%20damage.-Master.PDF
- Photo 6. Fragment damage to left wingtip. (item 35, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065376&FileExtension=.PDF&FileName=Photo%206.%20%20Fragment%20damage%20to%20left%20wingtip.-Master.PDF
- Photo 7. Wire gundle located along right longeron 4; 146 of the 154 wires in the wire bundle had been severed. (item 36, .PDF, 49 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065377&FileExtension=.PDF&FileName=Photo%207.%20%20Wire%20gundle%20located%20along%20right%20longeron%204;%20146%20of%20the%20154%20wires%20in%20the%20wire%20bundle%20had%20been%20severed.-Master.PDF
- Photo 8. Interior view of left fuselage penetration damage adjacent to row 37. (item 37, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065378&FileExtension=.PDF&FileName=Photo%208.%20%20Interior%20view%20of%20left%20fuselage%20penetration%20damage%20adjacent%20to%20row%2037.-Master.PDF
- Photo 9. Interior view of left fuselage penetration damage adjacent to row 37. (item 38, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065379&FileExtension=.PDF&FileName=Photo%209.%20%20Interior%20view%20of%20left%20fuselage%20penetration%20damage%20adjacent%20to%20row%2037.-Master.PDF
- Structures 7 - Exhibit No. 7B - Wreckage Distribution, Hub Piece Locations (item 39, .PDF, 86 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065380&FileExtension=.PDF&FileName=Structures%207%20-%20Exhibit%20No.%207B%20-%20Wreckage%20Distribution,%20Hub%20Piece%20Locations-Master.PDF
- Structures 7 - Exhibit No. 7C - Wreckage Photographs (3) (item 40, .PDF, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065381&FileExtension=.PDF&FileName=Structures%207%20-%20Exhibit%20No.%207C%20-%20Wreckage%20Photographs%20(3)-Master.PDF
- Powerplants 8 - Exhibit No. 8A - Group Chairman Factual Report (item 41, .PDF, 457 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469518&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208A%20-%20Group%20Chairman%20Factual%20Report-Master.PDF
- Powerplants 8 - Exhibit No. 8B - Figures and Photographs (item 42, .PDF, 466 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065383&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208B%20-%20Figures%20and%20Photographs-Master.PDF
- Powerplants 8 - Exhibit No. 8B-1 - Volva Manufacturing Drawing 0-169282 Sheets 1 and 4 - Volvo Hub Front Drill Process History (item 43, .PDF, 232 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065384&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208B-1%20-%20Volva%20Manufacturing%20Drawing%200-169282%20Sheets%201%20and%204%20%20-%20%20Volvo%20Hub%20Front%20Drill%20Process%20History-Master.PDF
- Powerplants 8 - Exhibit No. 8C - Powerplants Group Chairman's Factual Report of Investigation NTSB Accident MIA82IA051 March 18, 1982 (item 44, .PDF, 685 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469519&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208C%20-%20Powerplants%20Group%20Chairman%27s%20Factual%20Report%20of%20Investigation%20NTSB%20Accident%20MIA82IA051%20March%2018,%201982-Master.PDF
- Powerplants 8 - Exhibit No. 8D - Pratt & Whitney Research Report 704297-2440 April 5, 1982 (item 45, .PDF, 582 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065386&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208D%20-%20Pratt%20%26%20Whitney%20Research%20Report%20704297-2440%20April%205,%201982-Master.PDF
- Powerplants 8 - Exhibit No. 8E - Technical Review of Fluorescent Penetrant Process Delta Airlines, Inc.. August 13 & 14, 1996 (item 46, .PDF, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469520&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208E%20-%20Technical%20Review%20of%20Fluorescent%20Penetrant%20Process%20Delta%20Airlines,%20Inc..%20August%2013%20%26%2014,%201996-Master.PDF
- Powerplants 8 - Exhibit No. 8F - ANE-180 Evaluation Report of Pratt & Whitney Quality System - September 30, 1996 (item 47, .PDF, 259 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469521&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208F%20-%20ANE-180%20Evaluation%20Report%20of%20Pratt%20%26%20Whitney%20Quality%20System%20-%20September%2030,%201996-Master.PDF
- Powerplants 8 - Exhibit No. 8G - Attachment 1 - Phase 1 Report (Pratt & Whitney) (item 48, .PDF, 1.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469522&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208G%20-%20Attachment%201%20-%20Phase%201%20Report%20(Pratt%20%26%20Whitney)-Master.PDF
- Powerplants 8 - Exhibit No. 8H - Attachment 2 - Phase II Report (Volvo) (item 49, .PDF, 886 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469523&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208H%20-%20Attachment%202%20-%20Phase%20II%20Report%20(Volvo)-Master.PDF
- Powerplants 8 - Exhibit No. 8I - Pratt & Whitney Chart Process Control/Quality Inspections of a Titanium Part (Undated) (item 50, .PDF, 43 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065391&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208I%20-%20Pratt%20%26%20Whitney%20Chart%20Process%20Control%2FQuality%20Inspections%20of%20a%20Titanium%20Part%20(Undated)-Master.PDF
- Powerplants 8 - Exhibit No. 8J - JT8D-200 Series Fan Hub Industry Meeting (item 51, .PDF, 2.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469524&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208J%20-%20JT8D-200%20Series%20Fan%20Hub%20Industry%20Meeting-Master.PDF
- Powerplants 8 - Exhibit No. 8K - 14 CFR Parts 21 and 33 Selected Papers (item 52, .PDF, 780 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065393&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208K%20-%2014%20CFR%20Parts%2021%20and%2033%20Selected%20Papers-Master.PDF
- Powerplants 8 - Exhibit No. 8L - Volvo Aero Corporation Drill Type (item 53, .PDF, 5 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065394&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208L%20-%20Volvo%20Aero%20Corporation%20Drill%20Type-Master.PDF
- Photo 1. Drill Type (item 54, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065395&FileExtension=.PDF&FileName=Photo%201.%20%20Drill%20Type-Master.PDF
- Powerplants 8 - Exhibit No. 8M - Volvo Aero Corporation Drilling with HSS (item 55, .PDF, 6 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065396&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208M%20-%20Volvo%20Aero%20Corporation%20Drilling%20with%20HSS-Master.PDF
- Photo 1. Drilling with HSS (item 56, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065397&FileExtension=.PDF&FileName=Photo%201.%20%20Drilling%20with%20HSS-Master.PDF
- Powerplants 8 -Exhibit No. 8N - Volvo Aero Corporation Quality System (item 57, .PDF, 4 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065398&FileExtension=.PDF&FileName=Powerplants%208%20-Exhibit%20No.%208N%20-%20Volvo%20Aero%20Corporation%20Quality%20System-Master.PDF
- Photo 1. Volvo Aero Corporation Quality System (item 58, .PDF, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065399&FileExtension=.PDF&FileName=Photo%201.%20%20Volvo%20Aero%20Corporation%20Quality%20System-Master.PDF
- Powerplants 8 - Exhibit No. 8O - Volvo Aero Corporation Quality System 1988 (item 59, .PDF, 4 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065400&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208O%20-%20Volvo%20Aero%20Corporation%20Quality%20System%201988-Master.PDF
- Photo 1. Volvo Aero Corporation Quality System 1988 (item 60, .PDF, 33 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065401&FileExtension=.PDF&FileName=Photo%201.%20%20Volvo%20Aero%20Corporation%20Quality%20System%201988-Master.PDF
- Powerplants 8 - Exhibit No. 8P - Volvo Aero Corporation Quality System 1997 (item 61, .PDF, 12 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065402&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208P%20-%20Volvo%20Aero%20Corporation%20Quality%20System%201997-Master.PDF
- Photo 1. Volvo Aero Corporation Quaility System 1997 (item 62, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065403&FileExtension=.PDF&FileName=Photo%201.%20%20Volvo%20Aero%20Corporation%20Quaility%20System%201997-Master.PDF
- Powerplants 8 - Exhibit No. 8Q - Volvo Aero Corporation Finished Part (item 63, .PDF, 4 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065404&FileExtension=.PDF&FileName=Powerplants%208%20-%20Exhibit%20No.%208Q%20-%20Volvo%20Aero%20Corporation%20Finished%20Part-Master.PDF
- Photo 1. Volvo Aero Corporation Finished Part (item 64, .PDF, 31 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065405&FileExtension=.PDF&FileName=Photo%201.%20%20Volvo%20Aero%20Corporation%20Finished%20Part-Master.PDF
- Powerplants 8 -Exhibit No. 8R - NTSB Safety Recommendations A-96-74, -75, -76, and -77 July 29, 1996 - with Related Documents (item 65, .PDF, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469525&FileExtension=.PDF&FileName=Powerplants%208%20-Exhibit%20No.%208R%20-%20NTSB%20Safety%20Recommendations%20A-96-74,%20-75,%20-76,%20and%20-77%20July%2029,%201996%20%20-%20with%20Related%20Documents-Master.PDF
- Flight Data Recorder 10 - Group Chairman Factual Report (item 66, .PDF, 123 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469526&FileExtension=.PDF&FileName=Flight%20Data%20Recorder%2010%20-%20Group%20Chairman%20Factual%20Report-Master.PDF
- Flight Data Recorder 10 - Attachment 1--DFDR Parameter Listing (item 67, .PDF, 52 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065408&FileExtension=.PDF&FileName=Flight%20Data%20Recorder%2010%20-%20Attachment%201--DFDR%20Parameter%20Listing-Master.PDF
- Flight Data Recorder 10 - Attachment 2--Plotted Data (item 68, .PDF, 142 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065409&FileExtension=.PDF&FileName=Flight%20Data%20Recorder%2010%20-%20Attachment%202--Plotted%20Data-Master.PDF
- Flight Data Recorder 10 - Attachment 3 - Tabular Data (item 69, .PDF, 313 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065410&FileExtension=.PDF&FileName=Flight%20Data%20Recorder%2010%20-%20Attachment%203%20-%20Tabular%20Data-Master.PDF
- Maintenance Records 11 - Exhibit No. 11A - Group Chairman Factual Report (item 70, .PDF, 250 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469527&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011A%20-%20Group%20Chairman%20Factual%20Report-Master.PDF
- Maintenance Records 11 - Exhibit No. 11B - Attachment 1 - Pratt & Whitney Statement July 10, 1996 (item 71, .PDF, 87 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469528&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011B%20-%20Attachment%201%20-%20Pratt%20%26%20Whitney%20Statement%20July%2010,%201996-Master.PDF
- Maintenance Records 11 - Exhibit No. 11C - Attachment 2 - Pratt & Whitney Quality Standard Visual Inspection Standard 454 (With Deletions) (item 72, .PDF, 369 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065413&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011C%20-%20Attachment%202%20-%20Pratt%20%26%20Whitney%20Quality%20Standard%20Visual%20Inspection%20Standard%20454%20(With%20%20Deletions)-Master.PDF
- Maintenance Records 11 - Exhibit No. 11D - Attachment 3 - Pratt & Whitney Suppliers Report of Nonconformance (item 73, .PDF, 180 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469529&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011D%20-%20Attachment%203%20-%20Pratt%20%26%20Whitney%20Suppliers%20Report%20of%20Nonconformance-Master.PDF
- Maintenance Records 11 - Exhibit No. 11E - Attachment 4 - English Translation of Volvo's Manufacturing Records on HUB S/N 32971 (item 74, .PDF, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469530&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011E%20-%20Attachment%204%20-%20English%20Translation%20of%20Volvo%27s%20Manufacturing%20Records%20on%20HUB%20S%2FN%2032971-Master.PDF
- Maintenance Records 11 - Attachment 5 - Pratt & Whitney Letter/Statement Addressing Their Involvement with Volvo July 19, 1996 (item 75, .PDF, 250 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469531&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%205%20-%20Pratt%20%26%20Whitney%20Letter%2FStatement%20Addressing%20Their%20Involvement%20with%20Volvo%20July%2019,%201996-Master.PDF
- Maintenance Records 11 - Attachment 6 - Interview Statement and Fax From Pratt & Whitney Representative July 30, 1996 (item 76, .PDF, 135 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469532&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%206%20-%20Interview%20Statement%20and%20Fax%20From%20Pratt%20%26%20Whitney%20Representative%20%20July%2030,%201996-Master.PDF
- Maintenance Records 11 - Attachment 7 - Delta Air Lines JT8D-219 Engine Shop Visit Maintenance Program and Related Sign-Off Sheeets (item 77, .PDF, 815 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469533&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%207%20-%20Delta%20Air%20Lines%20JT8D-219%20Engine%20Shop%20Visit%20Maintenance%20Program%20and%20Related%20Sign-Off%20Sheeets-Master.PDF
- Maintenance Records 11 - Attachment 8 - Pratt & Whitney JT8D Engine Manual Front Compressor HUB Inspection Section 72-33-31 (item 78, .PDF, 979 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065419&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%208%20-%20Pratt%20%26%20Whitney%20JT8D%20Engine%20Manual%20Front%20Compressor%20HUB%20Inspection%20Section%2072-33-31-Master.PDF
- Maintenance Records 11 - Attachment 9 - Delta Air Lines JT8D-219 Engine Maintenance Management Plan (EMMP) Light Maintenance Guidance and Records for Work Done on Engine and HUB (item 79, .PDF, 235 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469534&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%209%20-%20Delta%20Air%20Lines%20JT8D-219%20Engine%20Maintenance%20Management%20Plan%20(EMMP)%20Light%20Maintenance%20Guidance%20and%20Records%20for%20Work%20Done%20on%20Engine%20and%20HUB-Master.PDF
- Maintenance Records 11 - Attachment 10 - Delta Air Lines JT8D-219 EMMP Heavy Maintenance Plan (item 80, .PDF, 113 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065421&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%2010%20-%20Delta%20Air%20Lines%20JT8D-219%20%20EMMP%20Heavy%20Maintenance%20Plan-Master.PDF
- Maintenance Records 11 - Attachment 11 - Delta Air Lines Engine Test Log Engine S/N 726984 Dated December 30, 1995 (item 81, .PDF, 248 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469535&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%2011%20-%20Delta%20Air%20Lines%20Engine%20Test%20Log%20Engine%20S%2FN%20726984%20Dated%20December%2030,%201995-Master.PDF
- Maintenance Records 11 - Attachment 12 - Delta Air Lines Life Limited Part History and Job Instruction Cards with Sign-Offs Engine S/N 726984 (item 82, .PDF, 201 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469536&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%2012%20-%20Delta%20Air%20Lines%20Life%20Limited%20Part%20History%20and%20Job%20Instruction%20Cards%20with%20Sign-Offs%20Engine%20S%2FN%20726984-Master.PDF
- Maintenance Records 11 - Attachment 13 - Delta Air Lines Oil Consumption Records and Pratt and Whitney's Oil Consumption Valves JT8D-219 (item 83, .PDF, 151 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469537&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%2013%20-%20Delta%20Air%20Lines%20Oil%20Consumption%20Records%20and%20Pratt%20and%20Whitney%27s%20Oil%20Consumption%20Valves%20JT8D-219-Master.PDF
- Maintenance Records 11 - Attachment 14 - Delta Air Lines Maintenance History on Engine S/N 726984 Between 12/21/95 And It's Installation on N927DA (item 84, .PDF, 2.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469538&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Attachment%2014%20-%20Delta%20Air%20Lines%20Maintenance%20History%20on%20Engine%20S%2FN%20726984%20Between%2012%2F21%2F95%20And%20It%27s%20Installation%20on%20N927DA-Master.PDF
- Maintenance Records 11 - Exhibit No. 11F - Attachment 15 - Delta Air Lines Training Records of The Inspectors Who Last Inspected The Accident HUB S/N 32971 (item 85, .PDF, 362 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469539&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011F%20-%20Attachment%2015%20-%20Delta%20Air%20Lines%20Training%20Records%20of%20The%20Inspectors%20Who%20Last%20Inspected%20The%20Accident%20HUB%20S%2FN%2032971-Master.PDF
- Maintenance Records 11 - Exhibit No. 11G - Attachment 16 - Nondestructive Guidelines For Inspector (Delta) Training By Air Transport Association ATA Specification 105 (item 86, .PDF, 258 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065427&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011G%20-%20Attachment%2016%20-%20Nondestructive%20Guidelines%20For%20Inspector%20(Delta)%20Training%20By%20Air%20Transport%20Association%20ATA%20Specification%20105-Master.PDF
- Maintenance Records 11 - Exhibit No. 11H - Attachment 17 - Delta Air Lines NDT Inspector's Physical Examination Guide, Excerpt, Eye Exam (item 87, .PDF, 28 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065428&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011H%20-%20Attachment%2017%20-%20Delta%20%20Air%20Lines%20NDT%20Inspector%27s%20Physical%20Examination%20Guide,%20Excerpt,%20Eye%20Exam-Master.PDF
- Maintenance Records 11 - Exhibit No. 11I - Attachment 18 - Interview Statement With Delta's NDI Inspector (item 88, .PDF, 150 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065429&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011I%20-%20Attachment%2018%20-%20Interview%20Statement%20With%20Delta%27s%20NDI%20Inspector-Master.PDF
- Maintenance Records 11 - Exhibit No. 11J - Attachment 19 - Delta Air Lines Statement Concerning Plastic Bead Blasting Dated August 22, 1996 (item 89, .PDF, 38 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469563&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011J%20-%20Attachment%2019%20-%20Delta%20Air%20Lines%20Statement%20Concerning%20Plastic%20Bead%20Blasting%20Dated%20August%2022,%201996-Master.PDF
- Maintenance Records 11 - Exhibit No. 11K - Attachment 20 - Pratt & Whitney JT8D Engine Manual Process Standard Excerpt Plastic Bead Blasting (item 90, .PDF, 38 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469564&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011K%20-%20Attachment%2020%20-%20Pratt%20%26%20Whitney%20JT8D%20Engine%20Manual%20Process%20Standard%20Excerpt%20Plastic%20Bead%20Blasting-Master.PDF
- Maintenance Records 11 - Exhibit No. 11L - Attachment 21 - Pratt & Whitney JT8D Engine Manual Front Compressor Group 1st Stage HUB Cleaning Spop 19 Plastic Bead (item 91, .PDF, 200 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065432&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011L%20-%20%20Attachment%2021%20-%20Pratt%20%26%20Whitney%20JT8D%20Engine%20Manual%20Front%20Compressor%20Group%201st%20Stage%20HUB%20Cleaning%20Spop%2019%20Plastic%20Bead-Master.PDF
- Maintenance Records 11 - Exhibit No. 11M - Attachment 22 - Delta Air Lines Process Standard For Past Preparation and Inspection, No. 900-6-3, Dated October 1, 1995 (item 92, .PDF, 122 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469540&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011M%20-%20Attachment%2022%20-%20Delta%20Air%20Lines%20Process%20Standard%20For%20Past%20Preparation%20and%20Inspection,%20No.%20900-6-3,%20Dated%20October%201,%201995-Master.PDF
- Maintenance Records 11 - Exhibit No. 11N - Attachment 23 - Delta Air Lines Process Standard FPI 900-6-3 No. 2 Dated June 15, 1996 (item 93, .PDF, 1.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065434&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011N%20-%20Attachment%2023%20-%20Delta%20Air%20Lines%20Process%20Standard%20FPI%20900-6-3%20No.%202%20%20Dated%20June%2015,%201996-Master.PDF
- Maintenance Records 11 - Exhibit No. 11O - Attachment 24 - Delta Air Lines Engine Records, HUB N1 Comp Front (JTD-219) (item 94, .PDF, 197 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065435&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011O%20-%20%20Attachment%2024%20-%20Delta%20Air%20Lines%20Engine%20Records,%20HUB%20N1%20Comp%20Front%20(JTD-219)-Master.PDF
- Maintenance Records 11 - Exhibit No. 11P - Delta Air Lines Internal Memorandum Responding to FAA'S FPI Technical Review (item 95, .PDF, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065436&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011P%20-%20Delta%20Air%20Lines%20Internal%20Memorandum%20Responding%20to%20FAA%27S%20FPI%20Technical%20Review-Master.PDF
- Maintenance Records 11 - Exhibit No. 11Q - Delta Air Lines Copy of Pratt & Whitney's February, 1995 FPI Inspection Report (item 96, .PDF, 195 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469541&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011Q%20-%20Delta%20Air%20Lines%20Copy%20of%20Pratt%20%26%20Whitney%27s%20February,%201995%20FPI%20Inspection%20Report-Master.PDF
- Maintenance Records 11 - Exhibit No. 11R - Pratt & Whitney JT8D Engine Manual Front Compressor Group Cleaning (item 97, .PDF, 675 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065438&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011R%20-%20Pratt%20%26%20Whitney%20JT8D%20Engine%20Manual%20Front%20Compressor%20Group%20Cleaning-Master.PDF
- Maintenance Records 11 - Exhibit No. 11S - Delta Process Standard 9001-1 No. 18/21 Excerpt on Cleaning (item 98, .PDF, 579 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065439&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011S%20-%20Delta%20Process%20Standard%209001-1%20No.%2018%2F21%20Excerpt%20on%20Cleaning-Master.PDF
- Maintenance Records 11 - Exhibit No. 11T - GE Product Support Review of the Delta Atlanta TOC Engine Component FPI and Cleaning Process (item 99, .PDF, 615 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469542&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011T%20-%20GE%20Product%20Support%20Review%20of%20the%20Delta%20Atlanta%20%20TOC%20Engine%20Component%20FPI%20and%20Cleaning%20Process-Master.PDF
- Maintenance Records 11 - Exhibit No. 11U - Delta Air Lines Flow Chart On The Post Emulsify Type Penetrant System (item 100, .PDF, 51 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065441&FileExtension=.PDF&FileName=Maintenance%20Records%2011%20-%20Exhibit%20No.%2011U%20-%20Delta%20Air%20Lines%20Flow%20Chart%20On%20The%20Post%20Emulsify%20Type%20Penetrant%20System-Master.PDF
- Cockpit Voice Recorder 12 - Group Chairman Factual Report (item 101, .PDF, 492 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469543&FileExtension=.PDF&FileName=Cockpit%20Voice%20Recorder%2012%20-%20Group%20Chairman%20Factual%20Report-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15A - Metallurgist's Factual Report (item 102, .PDF, 234 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469544&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015A%20-%20Metallurgist%27s%20Factual%20Report-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15B - Metallurgist's Factual Report Supporting Material (item 103, .PDF, 676 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065444&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015B%20-%20Metallurgist%27s%20Factual%20Report%20Supporting%20Material-Master.PDF
- Materials Laboratory 15 - Evans East---Time-Of-Flight Secondary IOM Mass Spectrometry Analytical Report (item 104, .PDF, 612 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469545&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Evans%20East---Time-Of-Flight%20Secondary%20IOM%20Mass%20Spectrometry%20Analytical%20Report-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15C - Three Pieces of the Hub, As Received In The Materials Laboratory (item 105, .PDF, 5 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065446&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015C%20-%20Three%20Pieces%20of%20the%20Hub,%20As%20Received%20In%20The%20Materials%20Laboratory-Master.PDF
- Materials Laboratory 15 - Photo 1. Photograph Of Exhibit No. 15C (item 106, .PDF, 45 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065447&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Photo%201.%20Photograph%20Of%20Exhibit%20No.%2015C%20-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15D - Fracture Face On The Hub (item 107, .PDF, 11 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065448&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015D%20-%20Fracture%20Face%20On%20The%20Hub-Master.PDF
- Materials Laboratory 15 - Photo 1. Photograph of Exhibit No. 15D (item 108, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065449&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Photo%201.%20Photograph%20of%20Exhibit%20No.%2015D-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15E - Angled View Of The Facture Face At The Aft End Of The Tierod Hole (item 109, .PDF, 13 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065450&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015E%20-%20Angled%20View%20Of%20The%20Facture%20Face%20At%20The%20Aft%20End%20Of%20The%20Tierod%20Hole-Master.PDF
- Materials Laboratory 15 - Photo 1. Photograph of Exhibit No. 15E (item 110, .PDF, 39 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065451&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Photo%201.%20Photograph%20of%20Exhibit%20No.%2015E-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15F - Scanning Electron Microscope View Of The Tierod Hole Surface At Origin "02" (item 111, .PDF, 4 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065452&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015F%20-%20Scanning%20Electron%20Microscope%20View%20Of%20The%20Tierod%20Hole%20Surface%20At%20Origin%20%2202%22-Master.PDF
- Materials Laboratory 15 - Photo 1. Photograph of Exhibit No. 15F (item 112, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065453&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Photo%201.%20Photograph%20of%20Exhibit%20No.%2015F-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15G - Microstructure In The Damaged Portion Of The Tierod Hole (item 113, .PDF, 5 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065454&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015G%20-%20Microstructure%20In%20The%20Damaged%20Portion%20Of%20The%20Tierod%20Hole-Master.PDF
- Materials Laboratory 15 - Photo 1. Photograph of Exhibit No. 15G (item 114, .PDF, 49 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065455&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Photo%201.%20Photograph%20of%20Exhibit%20No.%2015G-Master.PDF
- Materials Laboratory 15 - Exhibit No. 15H - Blue Etch Anodize Test on Fracture Sample (item 115, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065456&FileExtension=.PDF&FileName=Materials%20Laboratory%2015%20-%20Exhibit%20No.%2015H%20-%20Blue%20Etch%20Anodize%20Test%20on%20Fracture%20Sample-Master.PDF
- Public Hearing Transcript 3/26/97 - 362 pages (item 116, .PDF, 14.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065457&FileExtension=.PDF&FileName=Public%20Hearing%20Transcript%203%2F26%2F97%20-%20362%20pages-Master.PDF
- Public Hearing Transcript 3/27/97 - 312 pages (item 117, .PDF, 12.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065458&FileExtension=.PDF&FileName=Public%20Hearing%20Transcript%203%2F27%2F97%20-%20312%20pages-Master.PDF
- Public Hearing Transcript 3/28/97 - 224 pages (item 118, .PDF, 9.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065459&FileExtension=.PDF&FileName=Public%20Hearing%20Transcript%203%2F28%2F97%20-%20224%20pages-Master.PDF
- Proposal of Corrections in Mr. B. Anderson's Testimony at the Public Hearing in Atlanta, March 26-28, 1997 (item 119, .PDF, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469546&FileExtension=.PDF&FileName=Proposal%20of%20Corrections%20in%20Mr.%20B.%20Anderson%27s%20Testimony%20at%20the%20Public%20Hearing%20in%20Atlanta,%20March%2026-28,%201997-Master.PDF
- Correspondence from Pratt & Whitney (item 120, .PDF, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469547&FileExtension=.PDF&FileName=Correspondence%20from%20Pratt%20%26%20Whitney-Master.PDF
- Pratt & Whitney Submission to NTSB (item 121, .PDF, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065462&FileExtension=.PDF&FileName=Pratt%20%26%20Whitney%20Submission%20to%20NTSB-Master.PDF
- Correspondence from Air Line PIlots Association (item 122, .PDF, 358 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469548&FileExtension=.PDF&FileName=Correspondence%20from%20Air%20Line%20PIlots%20Association-Master.PDF
- Correspondence from Delta Air Lines Party Coordinator (item 123, .PDF, 56 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469549&FileExtension=.PDF&FileName=Correspondence%20from%20Delta%20Air%20Lines%20Party%20Coordinator-Master.PDF
- Correspondence from Delta Air Lines (item 124, .PDF, 53 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469550&FileExtension=.PDF&FileName=Correspondence%20from%20Delta%20Air%20Lines-Master.PDF
- Delta Air Lines Submission to the NTSB (item 125, .PDF, 4.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065466&FileExtension=.PDF&FileName=Delta%20Air%20Lines%20Submission%20to%20the%20NTSB-Master.PDF
- Metallurgist's Factual Report 97-117 (item 126, .PDF, 306 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469551&FileExtension=.PDF&FileName=Metallurgist%27s%20Factual%20Report%2097-117-Master.PDF
- Characterization of Mounted Hub Section (Material Characterization) (item 127, .PDF, 215 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469552&FileExtension=.PDF&FileName=Characterization%20of%20Mounted%20Hub%20Section%20(Material%20Characterization)-Master.PDF
- Photo 1. Mounted Specimen. Mounting material was cut before removal for SIMS analysis. The tierod hole is identified. The boxed region contains the fracture origin and the "hardened layer". (item 128, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065469&FileExtension=.PDF&FileName=Photo%201.%20%20Mounted%20Specimen.%20%20Mounting%20material%20was%20cut%20before%20removal%20for%20SIMS%20analysis.%20The%20tierod%20hole%20is%20identified.%20The%20boxed%20region%20contains%20the%20fracture%20origin%20and%20the%20%22hardened%20layer%22.-Master.PDF
- Photo 2. Oxygen and arbon SIMS maps from first region examined. White indicated higher elemental concentrations. Both oxygen and carbon were observed to be concentrated in the "hardened layer" as well as in the cracks (white (item 129, .PDF, 20 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065470&FileExtension=.PDF&FileName=Photo%202.%20%20Oxygen%20and%20arbon%20SIMS%20maps%20from%20first%20region%20examined.%20White%20indicated%20higher%20elemental%20concentrations.%20Both%20oxygen%20and%20carbon%20were%20observed%20to%20be%20concentrated%20in%20the%20%22hardened%20layer%22%20as%20well%20as%20in%20the%20cracks%20(white-Master.PDF
- Photo 3. Oxygen, carbon, iron, and silicon SIMS maps of the second region examined. Elevated concentrations (more white) of oxygen, carbon, and iron were observed in the "hardened layer". (item 130, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065471&FileExtension=.PDF&FileName=Photo%203.%20%20Oxygen,%20carbon,%20iron,%20and%20silicon%20SIMS%20maps%20of%20the%20second%20region%20examined.%20Elevated%20concentrations%20(more%20white)%20of%20oxygen,%20carbon,%20and%20iron%20were%20observed%20in%20the%20%22hardened%20layer%22.%20-Master.PDF
- Photo 4. Backscatter electron image photomicrograph of polished surface containing "hardened layer" and at least 29 cracks. The red arrows in Regions 1 and 2 identify observed plastic deformation under the "hardened layer". (item 131, .PDF, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065472&FileExtension=.PDF&FileName=Photo%204.%20%20Backscatter%20electron%20image%20photomicrograph%20of%20polished%20surface%20containing%20%22hardened%20layer%22%20and%20at%20least%2029%20cracks.%20The%20red%20arrows%20in%20Regions%201%20and%202%20identify%20observed%20plastic%20deformation%20under%20the%20%22hardened%20layer%22.%20-Master.PDF
- Photo 5. EDS map of the location labeled "A" in Region 1, Figure 4. An elevated concentration of K-bank iron was found in the patch of high intensity backscatter electrons (arrow). (item 132, .PDF, 43 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065473&FileExtension=.PDF&FileName=Photo%205.%20%20EDS%20map%20of%20the%20location%20labeled%20%22A%22%20in%20Region%201,%20Figure%204.%20An%20elevated%20concentration%20of%20K-bank%20iron%20was%20found%20in%20the%20patch%20of%20high%20intensity%20backscatter%20electrons%20(arrow).-Master.PDF
- Photo 6. EDS map of Region 3, Figure 4. Elevated concentrations of K-band oxygen, aluminum, iron, and chromium (arrows) were identified. (item 133, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065474&FileExtension=.PDF&FileName=Photo%206.%20%20EDS%20map%20of%20Region%203,%20Figure%204.%20Elevated%20concentrations%20of%20K-band%20oxygen,%20aluminum,%20iron,%20and%20chromium%20(arrows)%20were%20identified.-Master.PDF
- Photo 7. EDS map of bulk microstructure (Region 4, Figure 4.) ELevated concentrations of K-bank aluminum were observed to correspond to equiaxed alpha microstructure (arrows). (item 134, .PDF, 38 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065475&FileExtension=.PDF&FileName=Photo%207.%20%20EDS%20map%20of%20bulk%20microstructure%20(Region%204,%20Figure%204.)%20ELevated%20concentrations%20of%20K-bank%20aluminum%20were%20observed%20to%20correspond%20to%20equiaxed%20alpha%20microstructure%20(arrows).-Master.PDF
- Photo 8. Backscatter electron image of the tierod hole surface. The red arrows identify patches of high intensity electron return. The yellow arrows identify the directional marring. White arrows outline the changed surface (item 135, .PDF, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065476&FileExtension=.PDF&FileName=Photo%208.%20%20Backscatter%20electron%20image%20of%20the%20tierod%20hole%20surface.%20The%20red%20arrows%20identify%20patches%20of%20high%20intensity%20electron%20return.%20The%20yellow%20arrows%20identify%20the%20directional%20marring.%20White%20arrows%20outline%20the%20changed%20surface%20-Master.PDF
- Photo 9. EDS map of Region 5, Figure 8. Elevated concentrations of K-band iron and chromium were identified in the regions of high intensity backscatter electron return (arrows). (item 136, .PDF, 38 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065477&FileExtension=.PDF&FileName=Photo%209.%20%20EDS%20map%20of%20Region%205,%20Figure%208.%20Elevated%20concentrations%20of%20K-band%20iron%20and%20chromium%20were%20identified%20in%20the%20regions%20of%20high%20intensity%20backscatter%20electron%20return%20(arrows).%20-Master.PDF
- Photo 10. EDS map of the directional marring found in Region 6, Figure 8. K-bank oxygen and silicon were identified in the marred regions. (item 137, .PDF, 37 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065478&FileExtension=.PDF&FileName=Photo%2010.%20%20EDS%20map%20of%20the%20directional%20marring%20found%20in%20Region%206,%20Figure%208.%20K-bank%20oxygen%20and%20silicon%20were%20identified%20in%20the%20marred%20regions.-Master.PDF
- Photo 11. EDS map of Region 7, Figure 8. K-bank oxygen and silicon (arrows) were observed on the regions of low intensity backscatter electron return. (item 138, .PDF, 36 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065479&FileExtension=.PDF&FileName=Photo%2011.%20%20EDS%20map%20of%20Region%207,%20Figure%208.%20K-bank%20oxygen%20and%20silicon%20(arrows)%20were%20observed%20on%20the%20regions%20of%20low%20intensity%20backscatter%20electron%20return.-Master.PDF
- Photo 12. EDS map of the high intensity backscatter electron return from region 8, Figure 8. An alevated concentration of K-band iron (arrow) was observed. (item 139, .PDF, 40 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065480&FileExtension=.PDF&FileName=Photo%2012.%20%20EDS%20map%20of%20the%20high%20intensity%20backscatter%20electron%20return%20from%20region%208,%20Figure%208.%20An%20alevated%20concentration%20of%20K-band%20iron%20(arrow)%20was%20observed.-Master.PDF
- Photo 13. EDS spectrum taken from gold coated section of mounting compound. The oxygen and silicon peaks are identified. (item 140, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065481&FileExtension=.PDF&FileName=Photo%2013.%20%20EDS%20spectrum%20taken%20from%20gold%20coated%20section%20of%20mounting%20compound.%20The%20oxygen%20and%20silicon%20peaks%20are%20identified.-Master.PDF
- Characterization of Mounted Hub Section - Attachment 1 (item 141, .PDF, 98 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469553&FileExtension=.PDF&FileName=Characterization%20of%20Mounted%20Hub%20Section%20-%20Attachment%201-Master.PDF
- Characterization of Mounted Hub Section - Attachment 2 (item 142, .PDF, 71 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469554&FileExtension=.PDF&FileName=Characterization%20of%20Mounted%20Hub%20Section%20-%20Attachment%202-Master.PDF
- Characterization of Mounted Hub Section - Attachment 3 (item 143, .PDF, 76 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469555&FileExtension=.PDF&FileName=Characterization%20of%20Mounted%20Hub%20Section%20-%20Attachment%203-Master.PDF
- Characterization of Mounted Hub Section - Attachment 4 (item 144, .PDF, 76 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469556&FileExtension=.PDF&FileName=Characterization%20of%20Mounted%20Hub%20Section%20-%20Attachment%204-Master.PDF
- Delta Air Lines Party Coordinator's Submitted Comments on McDonnell Douglas' Submission (item 145, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065486&FileExtension=.PDF&FileName=Delta%20Air%20Lines%20Party%20Coordinator%27s%20Submitted%20Comments%20on%20McDonnell%20Douglas%27%20Submission-Master.PDF
- Metallurgist's Factual Report 97-136 (item 146, .PDF, 507 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469558&FileExtension=.PDF&FileName=Metallurgist%27s%20Factual%20Report%2097-136-Redacted.PDF
- Volvo Aero Corporation Submission (item 147, .PDF, 366 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469557&FileExtension=.PDF&FileName=Volvo%20Aero%20Corporation%20Submission-Master.PDF
- Photo 1. Hole #2B. Cutting without coolant with HSS drill to breakdown. Cutting data see report 9634-0101. (item 148, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065489&FileExtension=.PDF&FileName=Photo%201.%20%20Hole%20%232B.%20Cutting%20without%20coolant%20with%20HSS%20drill%20to%20breakdown.%20Cutting%20data%20see%20report%209634-0101.-Master.PDF
- Photo 2. Cross section of hole #2B, quite close to the location of the drill breakdown, showing similar microstructure as JT8-hub failure. Hardness impressions on the photo represent 53 HRC, 37 HRC and 31 HRC, almost identic (item 149, .PDF, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065490&FileExtension=.PDF&FileName=Photo%202.%20%20Cross%20section%20of%20hole%20%232B,%20quite%20close%20to%20the%20location%20of%20the%20drill%20breakdown,%20showing%20similar%20microstructure%20as%20JT8-hub%20failure.%20Hardness%20impressions%20on%20the%20photo%20represent%2053%20HRC,%2037%20HRC%20and%2031%20HRC,%20almost%20identic-Master.PDF
- Photo 3. Cross section of hole #2B quite close to the location of the drill breakdown. Mag. 7-8X. (item 150, .PDF, 39 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065491&FileExtension=.PDF&FileName=Photo%203.%20%20Cross%20section%20of%20hole%20%232B%20quite%20close%20to%20the%20location%20of%20the%20drill%20breakdown.%20Mag.%207-8X.-Master.PDF
- Photo 4. Cross section of hole #2B quite close to the location of the drill breakdown showing a surface layer with cracks and a appearance similar to the failed JT8-hub. (item 151, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065492&FileExtension=.PDF&FileName=Photo%204.%20%20Cross%20section%20of%20hole%20%232B%20quite%20close%20to%20the%20location%20of%20the%20drill%20breakdown%20showing%20a%20surface%20layer%20with%20cracks%20and%20a%20appearance%20similar%20to%20the%20failed%20JT8-hub.%20-Master.PDF
- Photo 5. Cross section of hole #2B quite close to the location of the drill breakdown showing a surface layer with an appearance similar to the failed JT8-hub. Mag. 128X. (item 152, .PDF, 48 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065493&FileExtension=.PDF&FileName=Photo%205.%20%20Cross%20section%20of%20hole%20%232B%20quite%20close%20to%20the%20location%20of%20the%20drill%20breakdown%20showing%20a%20surface%20layer%20with%20an%20appearance%20similar%20to%20the%20failed%20JT8-hub.%20Mag.%20128X.-Master.PDF
- Photo 6. Cross section of hole #2B quite close to the location of the drill breakdown showing a surface layer with a apperance similar to the failed JT8-hub. (item 153, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065494&FileExtension=.PDF&FileName=Photo%206.%20%20Cross%20section%20of%20hole%20%232B%20quite%20close%20to%20the%20location%20of%20the%20drill%20breakdown%20showing%20a%20surface%20layer%20with%20a%20apperance%20similar%20to%20the%20failed%20JT8-hub.%20-Master.PDF
- Photo 6A. Concentration Profile Sample 2B (item 154, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065495&FileExtension=.PDF&FileName=Photo%206A.%20%20Concentration%20Profile%20Sample%202B-Master.PDF
- Photo 7. Hole #2 drilled with standard cutting data with HSS. The arrows show BEA indications consisting of impressions of chips smeared on the hole surface. (item 155, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065496&FileExtension=.PDF&FileName=Photo%207.%20%20Hole%20%232%20drilled%20with%20standard%20cutting%20data%20with%20HSS.%20The%20arrows%20show%20BEA%20indications%20consisting%20of%20impressions%20of%20chips%20smeared%20on%20the%20hole%20surface.-Master.PDF
- Photo 8. Longitudinal section of hole 2 through a BEA indication, arrow A in photo 7. The microstructure showing plastic deformation to a depth of up to 35um (1.38 mills) created by a impression of a chip. Mag. 500X. (item 156, .PDF, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065497&FileExtension=.PDF&FileName=Photo%208.%20%20Longitudinal%20section%20of%20hole%202%20through%20a%20BEA%20indication,%20arrow%20A%20in%20photo%207.%20The%20microstructure%20showing%20plastic%20deformation%20to%20a%20depth%20of%20up%20to%2035um%20(1.38%20mills)%20created%20by%20a%20impression%20of%20a%20chip.%20Mag.%20500X.-Master.PDF
- Photo 9. Longitudinal section of hole 2 through a BEA indication, arrow B in photo 7. A chip with deformed microstructure is smeared into the hole surface. Mag. 500X. (item 157, .PDF, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065498&FileExtension=.PDF&FileName=Photo%209.%20%20Longitudinal%20section%20of%20hole%202%20through%20a%20BEA%20indication,%20arrow%20B%20in%20photo%207.%20A%20chip%20with%20deformed%20microstructure%20is%20smeared%20into%20the%20hole%20surface.%20Mag.%20500X.-Master.PDF
- Photo 10. Same as previous. Mag 500X. (item 158, .PDF, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065499&FileExtension=.PDF&FileName=Photo%2010.%20%20Same%20as%20previous.%20Mag%20500X.-Master.PDF
- Photo 11. Hole #26 drilled with standard cutting data with HSS and fine bored. No indications came up to view a tBEA. (item 159, .PDF, 33 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065500&FileExtension=.PDF&FileName=Photo%2011.%20Hole%20%2326%20drilled%20with%20standard%20cutting%20data%20with%20HSS%20and%20fine%20%20bored.%20No%20indications%20came%20up%20to%20view%20a%20tBEA.-Master.PDF
- Photo 12. Cross section of hole #26 showing deformed material to a depth of up to 12 um (0.47 mills). Mag 500X. (item 160, .PDF, 40 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065501&FileExtension=.PDF&FileName=Photo%2012.%20%20Cross%20section%20of%20hole%20%2326%20showing%20deformed%20material%20to%20a%20depth%20of%20up%20to%2012%20um%20(0.47%20mills).%20Mag%20500X.-Master.PDF
- Photo 13. Hole #25 drilled with standard cutting data with HSS, fine bored and honed. BEA shows no indications. (item 161, .PDF, 31 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065502&FileExtension=.PDF&FileName=Photo%2013.%20%20Hole%20%2325%20drilled%20with%20standard%20cutting%20data%20with%20HSS,%20fine%20bored%20and%20honed.%20BEA%20shows%20no%20indications.-Master.PDF
- Photo 14. Cross section of hole #25 showing deformed material to a depth of 5 um (0.20 mills). Mag 500X. (item 162, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065503&FileExtension=.PDF&FileName=Photo%2014.%20%20Cross%20section%20of%20hole%20%2325%20showing%20deformed%20material%20to%20a%20depth%20of%205%20um%20(0.20%20mills).%20Mag%20500X.-Master.PDF
- Photo 15. Hole adjacent to hole #1A drilled with HSS to failure by increased cutting data and without coolant. BEA has been performed. (item 163, .PDF, 31 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065504&FileExtension=.PDF&FileName=Photo%2015.%20%20Hole%20adjacent%20to%20hole%20%231A%20drilled%20with%20HSS%20to%20failure%20by%20increased%20cutting%20data%20and%20without%20coolant.%20BEA%20has%20been%20performed.%20-Master.PDF
- Photo 16. Hole #1A after opening up and BEA. And elliptic cavity can be seen on the ID. The surrounding area of the cavity indicated alternaterly in grey and blue. (item 164, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065505&FileExtension=.PDF&FileName=Photo%2016.%20%20Hole%20%231A%20after%20opening%20up%20and%20BEA.%20And%20elliptic%20cavity%20can%20be%20seen%20on%20the%20ID.%20The%20surrounding%20area%20of%20the%20cavity%20indicated%20alternaterly%20in%20grey%20and%20blue.-Master.PDF
- Photo 17. Hole #1A. Longitudinal section showing remelt material with cracks and overheated material (above B-transus) with transformed B. The section is located at arrow A in photo 16. Mag 500X. (item 165, .PDF, 60 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065506&FileExtension=.PDF&FileName=Photo%2017.%20%20Hole%20%231A.%20Longitudinal%20section%20showing%20remelt%20material%20with%20cracks%20and%20overheated%20material%20(above%20B-transus)%20with%20transformed%20B.%20The%20section%20is%20located%20at%20arrow%20A%20in%20photo%2016.%20Mag%20500X.-Master.PDF
- Photo 18. Hole #1A. Longitudinal section of showing overheated material (above B-transus) with transformed B and partially transformed B. The section is located at arrow B in photo 16. Mag 200X (item 166, .PDF, 58 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065507&FileExtension=.PDF&FileName=Photo%2018.%20%20Hole%20%231A.%20Longitudinal%20section%20of%20showing%20overheated%20material%20(above%20B-transus)%20with%20transformed%20B%20and%20partially%20transformed%20B.%20The%20section%20is%20located%20at%20arrow%20B%20in%20photo%2016.%20Mag%20200X-Master.PDF
- Photo 19. Hole adjacent to hole #1B drilled with HSS to failure by increased cutting data and without coolant. BEA has been performed. (item 167, .PDF, 35 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065508&FileExtension=.PDF&FileName=Photo%2019.%20%20Hole%20adjacent%20to%20hole%20%231B%20drilled%20with%20HSS%20to%20failure%20by%20increased%20cutting%20data%20and%20without%20coolant.%20%20BEA%20has%20been%20performed.-Master.PDF
- Photo 20. Hole #1B after deviding and BEA. The ID exhibit an BEA indication consisting of a mostly blue elliptic spot with surrounding area which indicated alternaterly in grey and blue. Compare with photo 16. (item 168, .PDF, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065509&FileExtension=.PDF&FileName=Photo%2020.%20%20Hole%20%231B%20after%20deviding%20and%20BEA.%20The%20ID%20exhibit%20an%20BEA%20indication%20consisting%20of%20a%20mostly%20blue%20elliptic%20spot%20with%20surrounding%20area%20which%20indicated%20alternaterly%20in%20grey%20and%20blue.%20Compare%20with%20photo%2016.-Master.PDF
- Photo 21. A close up of the center of the BEA indication in hole #1B. The grey area G is contaminated with iron (Fe) in difference with the blue area B. Notice the crack in the area. (item 169, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065510&FileExtension=.PDF&FileName=Photo%2021.%20%20A%20close%20up%20of%20the%20center%20of%20the%20BEA%20indication%20in%20hole%20%231B.%20The%20grey%20area%20G%20is%20contaminated%20with%20iron%20(Fe)%20in%20difference%20with%20the%20blue%20area%20B.%20Notice%20the%20crack%20in%20the%20area.-Master.PDF
- Photo 22. Hole #57 drilled with increased cutting data with HM to breakdown. The hole has also been fine bored and honed. BEA shows a white-grey indication in the drill breakdown area. (item 170, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065511&FileExtension=.PDF&FileName=Photo%2022.%20%20Hole%20%2357%20drilled%20with%20increased%20cutting%20data%20with%20HM%20to%20breakdown.%20The%20hole%20has%20also%20been%20fine%20bored%20and%20honed.%20BEA%20shows%20a%20white-grey%20indication%20in%20the%20drill%20breakdown%20area.-Master.PDF
- Photo 23. Hole #57 after reetch. The indication appear blue. (item 171, .PDF, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065512&FileExtension=.PDF&FileName=Photo%2023.%20%20Hole%20%2357%20after%20reetch.%20The%20indication%20appear%20blue.-Master.PDF
- Photo 24. Cross section of the indication area in hole #57. The microstructure shows deformation to a depth of 0.2 mm (0.0079 inch). Mag. 32X. (item 172, .PDF, 62 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065513&FileExtension=.PDF&FileName=Photo%2024.%20%20Cross%20section%20of%20the%20indication%20area%20in%20hole%20%2357.%20The%20microstructure%20shows%20deformation%20to%20a%20depth%20of%200.2%20mm%20(0.0079%20inch).%20Mag.%2032X.-Master.PDF
- Photo 25. A close up on the indication area in hole #57 in previous photo. During the drill breakdown particles on tungsten (W) have been pressed into the ID. (item 173, .PDF, 55 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065514&FileExtension=.PDF&FileName=Photo%2025.%20%20A%20close%20up%20on%20the%20indication%20area%20in%20hole%20%2357%20in%20previous%20photo.%20During%20the%20drill%20breakdown%20particles%20on%20tungsten%20(W)%20have%20been%20pressed%20into%20the%20ID.%20-Master.PDF
- Photo 26. The indication area in hole #57. Chemical analysis in SEM areas with iron (Fe) and tungsten (W) have been verified which indicate grey in BEA. (item 174, .PDF, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065515&FileExtension=.PDF&FileName=Photo%2026.%20%20The%20indication%20area%20in%20hole%20%2357.%20Chemical%20analysis%20in%20SEM%20areas%20with%20iron%20(Fe)%20and%20tungsten%20(W)%20have%20been%20verified%20which%20indicate%20grey%20in%20BEA.-Master.PDF
- Photo 27. Hole #52 drilled with increased cutting data with HSS to breakage. The hole has also been fine bored and honed. The hole was blue etched before and after being sectioned into two halfs. (item 175, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065516&FileExtension=.PDF&FileName=Photo%2027.%20%20Hole%20%2352%20drilled%20with%20increased%20cutting%20data%20with%20HSS%20to%20breakage.%20The%20hole%20has%20also%20been%20fine%20bored%20and%20honed.%20The%20hole%20was%20blue%20etched%20before%20and%20after%20being%20sectioned%20into%20two%20halfs.%20-Master.PDF
- Photo 28. Microstructure of hole #52 showing deformed and overheated material. Mag. 32X. (item 176, .PDF, 45 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065517&FileExtension=.PDF&FileName=Photo%2028.%20%20Microstructure%20of%20hole%20%2352%20showing%20deformed%20and%20overheated%20material.%20Mag.%2032X.-Master.PDF
- Photo 29. A close up of photo 28. Microstructure of hole #52 showing deformed and overheated material to a depth of 0.6 - 0.7 mm (0.024-0.028 inch). Mag 64X. (item 177, .PDF, 38 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065518&FileExtension=.PDF&FileName=Photo%2029.%20%20A%20close%20up%20of%20photo%2028.%20%20Microstructure%20of%20hole%20%2352%20showing%20deformed%20and%20overheated%20material%20to%20a%20depth%20of%200.6%20-%200.7%20mm%20(0.024-0.028%20inch).%20Mag%2064X.-Master.PDF
- Photo 30. Example of a delta drill used without coolant. A heavy accumulation of chips accured during the testing. (item 178, .PDF, 24 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065519&FileExtension=.PDF&FileName=Photo%2030.%20%20Example%20of%20a%20delta%20drill%20used%20without%20coolant.%20A%20heavy%20accumulation%20of%20chips%20accured%20during%20the%20testing.-Master.PDF
- Correspondence from Patricia Garcia Concerning Delta #1288, Pensacola Accident July 6, 1996 (item 179, .PDF, 2.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469559&FileExtension=.PDF&FileName=Correspondence%20from%20Patricia%20Garcia%20Concerning%20Delta%20%231288,%20Pensacola%20Accident%20July%206,%201996-Master.PDF
- Pensacola, Florida Safety Recommendation (A-98-9 through -23) (item 180, .PDF, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40065521&FileExtension=.PDF&FileName=Pensacola,%20Florida%20Safety%20Recommendation%20(A-98-9%20through%20-23)-Master.PDF
- Douglas Aircraft Company Submission to the NTSB (item 181, .PDF, 610 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469560&FileExtension=.PDF&FileName=Douglas%20Aircraft%20Company%20Submission%20to%20the%20NTSB-Master.PDF
- (FAA) Titanium Rotating Components Review Team Report (item 182, .PDF, 4.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469561&FileExtension=.PDF&FileName=(FAA)%20Titanium%20Rotating%20Components%20Review%20Team%20Report-Master.PDF
- Correspondence from McDonnell Douglas (item 183, .PDF, 68 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40469562&FileExtension=.PDF&FileName=Correspondence%20from%20McDonnell%20Douglas-Master.PDF

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.