# NTSB DCA04MA030: Sikorsky S76A++, N579EH, Gulf of Mexico, March 23, 2004

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 1 · Major · Final report
- Date: March 23, 2004
- Place: Gulf of Mexico
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 10 fatal
- Status: Completed, report August 22, 2006
- Report: Board-adopted at Board Meeting
- Investigation class: Class 1
- NTSB office: Major Investigations Division
- Safety recommendations: Yes
- NTSB case key (mKey): 58950
- NTSB case page: https://www.ntsb.gov/investigations/Pages/DCA04MA030.aspx
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/58950/pdf
- Board report AAR0602 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR0602.pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=58950
- Page: https://openairdocs.org/ntsb/DCA04MA030

## Probable cause

the flight crew's failure to identify and arrest the helicopter's descent for undetermined reasons, which resulted in controlled flight into terrain.

## Sequence of events

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

- In flight collision with terrain/water, cruise
  - light condition - dark night (contributing factor)
  - altitude - inattentive, flightcrew (cause)
  - terrain condition - water (contributing factor)
  - descent, flightcrew (cause)

## Analysis

The Safety Board's full report is avialable at http://www.ntsb.gov/publictn/publictn.htm. The Aircraft Accident Report number is NTSB/AAR-06/02.

On March 23, 2004, about 1918:34 central standard time, an Era Aviation Sikorsky S-76A++ helicopter, N579EH, crashed into the Gulf of Mexico about 70 nautical miles south-southeast of Scholes International Airport (GLS), Galveston, Texas.  The helicopter was transporting eight oil service personnel to the Transocean, Inc., drilling ship Discoverer Spirit, which was en route to a location about 180 miles south-southeast of GLS.  The captain, copilot, and eight passengers aboard the helicopter were killed, and the helicopter was destroyed by impact forces.  The flight was operating under the provisions of 14 Code of Federal Regulations Part 135 on a visual flight rules flight plan.  Night visual meteorological conditions prevailed at the time of the accident.

## Factual narrative

The Safety Board's full report is avialable at http://www.ntsb.gov/publictn/publictn.htm. The Aircraft Accident Report number is NTSB/AAR-06/02.

On March 23, 2004, about 1918:34 central standard time, an Era Aviation Sikorsky S-76A++ helicopter, N579EH, crashed into the Gulf of Mexico about 70 nautical miles south-southeast of Scholes International Airport (GLS), Galveston, Texas.  The helicopter was transporting eight oil service personnel to the Transocean, Inc., drilling ship Discoverer Spirit, which was en route to a location about 180 miles south-southeast of GLS.  The captain, copilot, and eight passengers aboard the helicopter were killed, and the helicopter was destroyed by impact forces.  The flight was operating under the provisions of 14 Code of Federal Regulations Part 135 on a visual flight rules flight plan.  Night visual meteorological conditions prevailed at the time of the accident.

## Aircraft

- Registration: [N579EH](https://openairdocs.org/deregistered/N579EH-2004-07-28), registration cancelled 2004-07-28, S/N 760274, built 1984 (OpenAirDocs)
- Reported make and model: Sikorsky S76A++
- Registry model: [Sikorsky S-76A](https://openairdocs.org/model/sikorsky-s-76a) (registry code 8143006) (OpenAirDocs)
- Registry engine: [Turbomeca ARRIEL-1SER](https://openairdocs.org/engine/turbomeca-arriel-1ser) (registry code 60030, turbo-shaft) (OpenAirDocs)
- Category: Helicopter
- Serial number: 760274
- Airframe hours: 1069.4
- Engines: Turbomeca Arriel 1S1 825 horsepower turbo shaft; Turbomeca Arriel 1S1 825 horsepower turbo shaft
- Damage: Destroyed
- Flight: Part 135
- Operator: ERA Aviation, Inc.
- Registered owner: Era Aviation, Inc.
- Airworthiness certificate: Standard, Transport
- Last inspection: Continuous airworthiness, March 22, 2004, 5.4 hours before
- Departed: GLS, Galveston, TX
- Destination: AC738
- Flight plan: Company VFR
- Airport: GLS, Galveston - Shoals

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; injuries: fatal; airline transport; instrument ratings: helicopter; medical: class 1, valid medical--w/ waivers/lim; last flight review January 30, 2004; seat: right; toxicology performed; flight hours: 7,288 total, 1,489 in this make and model, 5,323 as pilot in command, 64 in the last 90 days, 32 in the last 30 days, 0 in the last 24 hours
- Co-pilot; age 46; injuries: fatal; commercial; airplane ratings: single-engine land; instrument ratings: helicopter, airplane; medical: class 1, valid medical--w/ waivers/lim; last flight review February 20, 2004; seat: left; toxicology performed; flight hours: 1,941 total, 483 in this make and model, 1,371 as pilot in command, 14 in the last 90 days, 5 in the last 30 days, 0 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 120° at 12 knots
- Visibility: 10 statute miles
- Temperature: 66 °F, dew point 61 °F

## 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 20040323007699A](https://openairdocs.org/incident/20040323007699A), Mar 23, 2004: Skrsky S76A, Galveston, TX, Destroyed, 10 fatal. (-23) The aircraft, chartered by unocal of houston, Texas, departed scholes international airport near Galveston, Texas at approximately 6:45 pm CST. Its…

## Docket (81 files)

The files NTSB released with the investigation on September 22, 2004, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=58950. 45.4 MB in all.

- Materials laboratory factual report 04-045 (item 1, PDF, 7 pages, 730 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5703967&FileExtension=pdf&FileName=Materials%20Laboratory%20Factual%20Report%2004-045-Master-Rel.pdf
- Operations group chairman's factual report (item 2, PDF, 33 pages, 285 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5703875&FileExtension=pdf&FileName=Operations%20Group%20Chairman%27s%20Factual%20Report-Master-Rel.pdf
- Errata sheet to operations group chairman's factual report (item 3, PDF, 2 pages, 45 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5704585&FileExtension=pdf&FileName=ERRATA%20SHEET%20to%20Operations%20Group%20Chairman%27s%20Factual%20Report-Master-Rel.pdf
- Interview of melanie covington (item 4, PDF, 31 pages, 223 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7609032&FileExtension=pdf&FileName=Interview%20of%20Melanie%20Covington-Master-Rel.pdf
- Interview of peter bowden (item 5, PDF, 51 pages, 377 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5705562&FileExtension=pdf&FileName=Interview%20of%20Peter%20Bowden-Master-Rel.pdf
- Interview of matt branon (item 6, PDF, 16 pages, 120 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5704704&FileExtension=pdf&FileName=Interview%20of%20Matt%20Branon-Master-Rel.pdf
- Interview of kurt covington (item 7, PDF, 21 pages, 155 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7609524&FileExtension=pdf&FileName=Interview%20of%20Kurt%20Covington-Master-Rel.pdf
- Interview of john davis (item 8, PDF, 62 pages, 471 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7609094&FileExtension=pdf&FileName=Interview%20of%20John%20Davis-Master-Rel.pdf
- Interview of fred defibaugh (item 9, PDF, 28 pages, 207 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610315&FileExtension=pdf&FileName=Interview%20of%20Fred%20Defibaugh-Master-Rel.pdf
- Interview of julie Douglas (item 10, PDF, 40 pages, 305 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610319&FileExtension=pdf&FileName=Interview%20of%20Julie%20Douglas-Master-Rel.pdf
- Interview of brent evans (item 11, PDF, 19 pages, 150 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7609987&FileExtension=pdf&FileName=Interview%20of%20Brent%20Evans-Master-Rel.pdf
- Interview of tim fix (item 12, PDF, 75 pages, 553 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610110&FileExtension=pdf&FileName=Interview%20of%20Tim%20Fix-Master-Rel.pdf
- Interview of bob hall (item 13, PDF, 44 pages, 342 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610074&FileExtension=pdf&FileName=Interview%20of%20Bob%20Hall-Master-Rel.pdf
- Interview of jay harriman (item 14, PDF, 89 pages, 619 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610772&FileExtension=pdf&FileName=Interview%20of%20Jay%20Harriman-Master-Rel.pdf
- Interview of brad mccraeken (item 15, PDF, 57 pages, 398 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611269&FileExtension=pdf&FileName=Interview%20of%20Brad%20McCraeken-Master-Rel.pdf
- Interview of rick oeder part 1 (item 16, PDF, 41 pages, 324 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611271&FileExtension=pdf&FileName=Interview%20of%20Rick%20Oeder%20part%201-Master-Rel.pdf
- Interview of rick oeder part 2 (item 17, PDF, 20 pages, 154 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610955&FileExtension=pdf&FileName=Interview%20of%20Rick%20Oeder%20part%202-Master-Rel.pdf
- Interview of bobby ward passmore (item 18, PDF, 58 pages, 421 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610774&FileExtension=pdf&FileName=Interview%20of%20Bobby%20Ward%20Passmore-Master-Rel.pdf
- Interview of edward smith (item 19, PDF, 60 pages, 438 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7610639&FileExtension=pdf&FileName=Interview%20of%20Edward%20Smith-Master-Rel.pdf
- Interview of robert stearns (item 20, PDF, 61 pages, 439 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611419&FileExtension=pdf&FileName=Interview%20of%20Robert%20Stearns-Master-Rel.pdf
- Interview of scott stottle (item 21, PDF, 61 pages, 431 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611421&FileExtension=pdf&FileName=Interview%20of%20Scott%20Stottle-Master-Rel.pdf
- Interview of james joseph mayor (item 22, PDF, 23 pages, 166 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611273&FileExtension=pdf&FileName=Interview%20of%20James%20Joseph%20Mayor-Master-Rel.pdf
- Telephone interview of gary wing (item 23, PDF, 73 pages, 554 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611318&FileExtension=pdf&FileName=Telephone%20interview%20of%20Gary%20Wing-Master-Rel.pdf
- Interview of ronald sams (item 24, PDF, 53 pages, 198 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611180&FileExtension=pdf&FileName=Interview%20of%20Ronald%20Sams-Master-Rel.pdf
- Interview of jon tuel (item 25, PDF, 36 pages, 248 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613020&FileExtension=pdf&FileName=Interview%20of%20Jon%20Tuel-Master-Rel.pdf
- Interview of paul hunt (item 26, PDF, 91 pages, 623 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613909&FileExtension=pdf&FileName=Interview%20of%20Paul%20Hunt-Master-Rel.pdf
- Era corrected bowden interview (item 27, PDF, 54 pages, 414 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613720&FileExtension=pdf&FileName=Era%20corrected%20Bowden%20interview-Master-Rel.pdf
- Era corrected branon interview (item 28, PDF, 17 pages, 138 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613805&FileExtension=pdf&FileName=Era%20corrected%20Branon%20interview-Master-Rel.pdf
- ATC 3-radar study (item 29, PDF, 2 pages, 78 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611712&FileExtension=pdf&FileName=ATC%203-Radar%20Study-Master-Rel.pdf
- Era corrected davis interview (item 30, PDF, 65 pages, 513 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613022&FileExtension=pdf&FileName=Era%20corrected%20Davis%20interview-Master-Rel.pdf
- Era corrected defibaugh interview (item 31, PDF, 30 pages, 239 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613562&FileExtension=pdf&FileName=Era%20corrected%20Defibaugh%20interview-Master-Rel.pdf
- Era corrected Douglas interview (item 32, PDF, 43 pages, 359 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613024&FileExtension=pdf&FileName=Era%20corrected%20Douglas%20interview-Master-Rel.pdf
- Era corrected evans interview (item 33, PDF, 19 pages, 157 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613807&FileExtension=pdf&FileName=Era%20corrected%20Evans%20interview-Master-Rel.pdf
- Era corrected fix interview (item 34, PDF, 79 pages, 625 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613566&FileExtension=pdf&FileName=Era%20corrected%20Fix%20interview-Master-Rel.pdf
- Era corrected hall interview (item 35, PDF, 44 pages, 352 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613447&FileExtension=pdf&FileName=Era%20corrected%20Hall%20interview-Master-Rel.pdf
- Era corrected harriman interview (item 36, PDF, 93 pages, 700 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613664&FileExtension=pdf&FileName=Era%20corrected%20Harriman%20interview-Master-Rel.pdf
- Era corrected kurt covengton interview (item 37, PDF, 22 pages, 179 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611714&FileExtension=pdf&FileName=Era%20corrected%20Kurt%20Covengton%20interview-Master-Rel.pdf
- Era corrected mayon interview (item 38, PDF, 24 pages, 191 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613809&FileExtension=pdf&FileName=Era%20corrected%20Mayon%20interview-Master-Rel.pdf
- Era corrected mccracken interview (item 39, PDF, 61 pages, 465 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613666&FileExtension=pdf&FileName=Era%20corrected%20McCracken%20interview-Master-Rel.pdf
- Era corrected MEL covington interview (item 40, PDF, 31 pages, 239 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613451&FileExtension=pdf&FileName=Era%20corrected%20Mel%20Covington%20interview-Master-Rel.pdf
- Era corrected oeder interview (item 41, PDF, 43 pages, 355 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613726&FileExtension=pdf&FileName=Era%20corrected%20Oeder%20interview-Master-Rel.pdf
- Era corrected oeder part 2 interview (item 42, PDF, 21 pages, 172 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613570&FileExtension=pdf&FileName=Era%20corrected%20Oeder%20part%202%20interview-Master-Rel.pdf
- Era corrected passmore interview (item 43, PDF, 58 pages, 459 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613728&FileExtension=pdf&FileName=Era%20corrected%20Passmore%20interview-Master-Rel.pdf
- Era corrected sams interview (item 44, PDF, 59 pages, 423 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613811&FileExtension=pdf&FileName=Era%20corrected%20Sams%20interview-Master-Rel.pdf
- Era corrected smith interview (item 45, PDF, 63 pages, 496 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613730&FileExtension=pdf&FileName=Era%20corrected%20Smith%20interview-Master-Rel.pdf
- Survival factors 6-factual report of group chairman (item 46, PDF, 5 pages, 72 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611718&FileExtension=pdf&FileName=Survival%20Factors%206-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf
- Era corrected stearns interview (item 47, PDF, 64 pages, 497 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613734&FileExtension=pdf&FileName=Era%20corrected%20Stearns%20interview-Master-Rel.pdf
- Era corrected stottle interview (item 48, PDF, 64 pages, 489 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7611720&FileExtension=pdf&FileName=Era%20corrected%20Stottle%20interview-Master-Rel.pdf
- Era corrected wing interview (item 49, PDF, 79 pages, 428 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613822&FileExtension=pdf&FileName=Era%20corrected%20Wing%20interview-Master-Rel.pdf
- ATC 3-radar extraction file obtained from USAF 84th radar evaluation squadron using houston ASR-9 radar site (item 50, EXE, 30 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=962391&FileExtension=exe&FileName=ATC%203-Radar%20Extraction%20File%20obtained%20from%20USAF%2084th%20Radar%20Evaluation%20Squadron%20using%20Houston%20ASR-9%20radar%20site-Master.exe
- Operations-attachment A1-ERA helicopters aircraft maintenance log (item 51, PDF, 67 pages, 4.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5704587&FileExtension=pdf&FileName=Operations-Attachment%20A1-Era%20Helicopters%20Aircraft%20Maintenance%20Log-Master-Rel.pdf
- Operations-attachment A2-ERA helicopters aircraft maintenance log (item 52, PDF, 70 pages, 3.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613824&FileExtension=pdf&FileName=Operations-Attachment%20A2-Era%20Helicopters%20Aircraft%20Maintenance%20Log-Master-Rel.pdf
- Operations-attachment b-summary interviews of mrs o'neal and capt fix (item 53, PDF, 5 pages, 221 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5704701&FileExtension=pdf&FileName=Operations-Attachment%20B-Summary%20Interviews%20of%20Mrs%20O%27Neal%20and%20Capt%20Fix-Master-Rel.pdf
- Operations-attachment c-list of interviews (item 54, PDF, 2 pages, 22 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=5705258&FileExtension=pdf&FileName=Operations-Attachment%20C-List%20of%20Interviews-Master-Rel.pdf
- Operations-attachment d-us gulf coast VFR aeronautical chart (item 55, PDF, 4 pages, 564 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7613830&FileExtension=pdf&FileName=Operations-Attachment%20D-US%20Gulf%20Coast%20VFR%20Aeronautical%20Chart-Master-Rel.pdf
- Operations-attachment e-sql edit history (item 56, PDF, 2 pages, 111 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614141&FileExtension=pdf&FileName=Operations-Attachment%20E-SQL%20Edit%20History-Master-Rel.pdf
- Operations 2-attachment f-photos of exterior cockpit and instrument panel taken prior to accident (item 57, PDF, 18 pages, 6.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614532&FileExtension=pdf&FileName=Operations%202-Attachment%20F-Photos%20of%20exterior%20cockpit%20and%20instrument%20panel%20taken%20prior%20to%20accident-Master-Rel.pdf
- Operations-attachment g-airnavcom (item 58, PDF, 8 pages, 401 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614535&FileExtension=pdf&FileName=Operations-Attachment%20G-AirNavcom-Master-Rel.pdf
- Airworthiness factual report of group chairman (item 59, PDF, 20 pages, 176 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614143&FileExtension=pdf&FileName=Airworthiness%20Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf
- Operations 2-attachment h-nws radar mosaic 3-24-04 (item 60, PDF, 2 pages, 280 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614030&FileExtension=pdf&FileName=Operations%202-Attachment%20H-NWS%20Radar%20Mosaic%203-24-04-Master-Rel.pdf
- Operations-attachment i-rowan companies inc letter dated 7-8-04 w-attachments (item 61, PDF, 14 pages, 708 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614881&FileExtension=pdf&FileName=Operations-Attachment%20I-Rowan%20Companies%20Inc%20letter%20dated%207-8-04%20w-attachments-Master-Rel.pdf
- Operations-attachment j-rowan companies inc letter dated 7-12-04 w-attachment (item 62, PDF, 20 pages, 572 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615235&FileExtension=pdf&FileName=Operations-Attachment%20J-Rowan%20Companies%20Inc%20letter%20dated%207-12-04%20w-attachment-Master-Rel.pdf
- Operations-attachment k-era aviation ground school attendance record 3-18-3-20-04 (item 63, PDF, 5 pages, 154 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614739&FileExtension=pdf&FileName=Operations-Attachment%20K-Era%20Aviation%20Ground%20School%20Attendance%20Record%203-18-3-20-04-Master-Rel.pdf
- Operations-attachment l-weight and balance chart (item 64, PDF, 4 pages, 285 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614899&FileExtension=pdf&FileName=Operations-Attachment%20L-Weight%20and%20Balance%20chart-Master-Rel.pdf
- Operations-attachment m-letter dated 6-1-04 from rick oeder regarding NTSB interview transcript (item 65, PDF, 2 pages, 72 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614693&FileExtension=pdf&FileName=Operations-Attachment%20M-letter%20dated%206-1-04%20from%20Rick%20Oeder%20regarding%20NTSB%20interview%20transcript-Master-Rel.pdf
- Cockpit voice recorder 12-factual report of group chairman (item 66, PDF, 9 pages, 635 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615053&FileExtension=pdf&FileName=Cockpit%20Voice%20Recorder%2012-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf
- Cockpit voice recorder 12A - sound spectrum study (item 67, PDF, 7 pages, 2 photos, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=20461540&FileExtension=pdf&FileName=Cockpit%20Voice%20Recorder%2012a-Sound%20Spectrum%20Study-Master-Release-Rel.pdf
- Cockpit voice recorder 12-addendum to the CVR factual report (item 68, PDF, 6 pages, 189 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614748&FileExtension=pdf&FileName=Cockpit%20Voice%20Recorder%2012-Addendum%20to%20the%20CVR%20Factual%20Report-Master-Rel.pdf
- Cockpit voice recorder 12-FAA form 337-CVR-audio panel installation documentation (item 69, PDF, 4 pages, 263 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614996&FileExtension=pdf&FileName=Cockpit%20Voice%20Recorder%2012-FAA%20Form%20337-CVR-Audio%20Panel%20Installation%20Documentation-Master-Rel.pdf
- Sikorsky submission cover page (item 70, PDF, 2 pages, 215 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7616046&FileExtension=pdf&FileName=Sikorsky%20submission%20cover%20page-Master-Rel.pdf
- Sikorsky submission (item 71, PDF, 25 pages, 757 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7616048&FileExtension=pdf&FileName=Sikorsky%20submission-Master-Rel.pdf
- Era aviation and unocal joint submission (item 72, PDF, 9 pages, 203 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615858&FileExtension=pdf&FileName=Era%20Aviation%20and%20UNOCAL%20joint%20submission-Master-Rel.pdf
- Era aviation and unocal sumbission cover letter (item 73, PDF, 4 pages, 88 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615809&FileExtension=pdf&FileName=Era%20Aviation%20and%20UNOCAL%20sumbission%20cover%20letter-Master-Rel.pdf
- Appendix a wreckage diagram (item 74, PDF, 21 pages, 752 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615242&FileExtension=pdf&FileName=Appendix%20A%20Wreckage%20Diagram-Master-Rel.pdf
- Appendix b aircraft records (item 75, PDF, 24 pages, 779 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7614700&FileExtension=pdf&FileName=Appendix%20B%20Aircraft%20Records-Master-Rel.pdf
- Appendix c maintenance inspections (item 76, PDF, 27 pages, 1.1 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615651&FileExtension=pdf&FileName=Appendix%20C%20Maintenance%20Inspections-Master-Rel.pdf
- Letter from mrs oneal (item 77, PDF, 4 pages, 653 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615985&FileExtension=pdf&FileName=Letter%20from%20Mrs%20Oneal-Master-Rel.pdf
- Board member recusal (item 78, PDF, 1 page, 46 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615460&FileExtension=pdf&FileName=Board%20Member%20Recusal-Master-Rel.pdf
- Human performance 14-factual report of group chairman (item 79, PDF, 69 pages, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7616052&FileExtension=pdf&FileName=Human%20Performance%2014-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf
- Data report gulf of Mexico helicopter operations (item 80, PDF, 11 pages, 285 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615205&FileExtension=pdf&FileName=Data%20Report%20Gulf%20of%20Mexico%20Helicopter%20Operations-Master-Rel.pdf
- Human performance 14-attachment 1 FAA S-76 SPZ-7000 autopilot evaluation (item 81, PDF, 6 pages, 89 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7615860&FileExtension=pdf&FileName=Human%20Performance%2014-Attachment%201%20FAA%20S-76%20SPZ-7000%20Autopilot%20Evaluation-Master-Rel.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.