# NTSB DCA04MA068: Convair Div. of Gen. Dynamics CV-340 (580), N586P, Florence, KY, August 13, 2004 - Type: NTSB accident investigation - Classification: Accident · Fatal · Class 1 · Major · Final report - Date: August 13, 2004, 00:49 local (05:49 UTC) - Place: Florence, KY - Coordinates: 38.990478, -84.640289 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=38.9905&lon=-84.6403&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal, 1 minor - Status: Completed, report August 9, 2006 - Report: Board-adopted at Board Meeting - Investigation class: Class 1 - NTSB office: Major Investigations Division - Parties: Air Tahoma, AAI-100, Washington, DC, Kelowna Flightcraft LTD., Transportation Safety Board of Canada, Rolls-Royce Corporation - Safety recommendations: Yes - NTSB case key (mKey): 59897 - NTSB case page: https://www.ntsb.gov/investigations/Pages/DCA04MA068.aspx - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59897/pdf - Board report AAR0603 (PDF): https://www.ntsb.gov/investigations/AccidentReports/Reports/AAR0603.pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=59897 - Page: https://openairdocs.org/ntsb/DCA04MA068 ## Probable cause fuel starvation resulting from the captain's decision not to follow approved fuel crossfeed procedures. Contributing to the accident were the captain's inadequate preflight planning, his subsequent distraction during the flight, and his lateinitiation of the in-range checklist. Further contributing to the accident was the flight crew's failure to monitor the fuel gauges and to recognize that the airplane's changing handling characteristics were caused by a fuel imbalance. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - nonmechanical, approach - fluid,fuel - starvation (cause) - checklist - not followed, pilot in command (cause) - inattentive, pilot in command (contributing factor) - preflight planning/preparation - inadequate, pilot in command (contributing factor) - checklist - delayed, pilot in command (contributing factor) - engine instruments,fuel quantity gage - starvation (contributing factor) - in-flight planning/decision - inadequate, flightcrew (contributing factor) - inattentive, flightcrew (contributing factor) - aircraft handling - not recognized, flightcrew (contributing factor) - Forced landing, descent - emergency - On ground/water encounter with terrain/water, emergency landing - terrain condition - ground ## Analysis The Board's full report is available at http://www.ntsb.gov/publictn/publictn.htm, AAR-06/03, PB2006-910403. On August 13, 2004, about 0049 eastern daylight time, Air Tahoma, Inc., flight 185, a Convair 580, N586P, crashed about 1 mile south of Cincinnati/Northern Kentucky International Airport (CVG), Covington, Kentucky, while on approach to runway 36R. The first officer was killed, and the captain received minor injuries. The airplane was destroyed by impact forces. The flight was operating under the provisions of 14 Code of Federal Regulations Part 121 as a cargo flight for DHL Express from Memphis International Airport, Memphis, Tennessee, to CVG. Visual meteorological conditions prevailed for the flight, which operated on an instrument flight rules flight plan. ## Factual narrative The Board's full report is available at http://www.ntsb.gov/publictn/publictn.htm, AAR-06/03, PB2006-910403. On August 13, 2004, about 0049 eastern daylight time,1 Air Tahoma, Inc., flight 185, a Convair 580, N586P, crashed about 1 mile south of Cincinnati/Northern Kentucky International Airport (CVG), Covington, Kentucky, while on approach to runway 36R. The first officer was killed, and the captain received minor injuries. The airplane was destroyed by impact forces. The flight was operating under the provisions of 14 Code of Federal Regulations (CFR) Part 121 as a cargo flight for DHL Express2 from Memphis International Airport (MEM), Memphis, Tennessee, to CVG. Visual meteorological conditions prevailed for the flight, which operated on an instrument flight rules flight plan. The flight crew was scheduled to fly the accident airplane on a roundtrip sequence from MEM to CVG.3 Flight 185 departed MEM about 2329. The first officer was the flying pilot, and the captain performed the nonflying pilot duties. During postaccident interviews, the captain stated that the takeoff and climb portions of the flight were normal. According to the cockpit voice recorder (CVR) transcript, at 0017:49, the captain stated that he was just going to "balance out the fuel here."4 The first officer acknowledged. From 0026:30 to 0027:08, the CVR recorded the captain discussing the airplane's weight and balance with the first officer. Specifically, the captain stated, "couldn't figure out why on the landing I was out and I was okay on the takeoff." The captain added, "the momentum is one six six seven and I…put one zero six seven and I couldn't work it." He then stated, "so…we were okay all along." At 0030:40, the first officer stated, "weird." At 0032:31, the captain stated, "okay just let me finish this [the weight and balance paperwork] off and…I'm happy," and, about 2 minutes later, he stated, "okay, back with you here." At 0037:08, the captain contacted Cincinnati Terminal Radar Approach Control (TRACON) and reported an altitude of 11,000 feet mean sea level.6 About 1 minute later, the first officer stated, "something's messed up with this thing," and, at 0039:07, he asked "why is this thing?" At 0041:21, the first officer stated that the control wheel felt "funny." He added, "feels like I need a lot of force. it is pushing to the right for some reason. I don't know why…I don't know what's going on." The first officer then repeated twice that it felt like he needed "a lot of force." The CVR did not record the captain responding to any of these comments. At 0043:53, when the airplane was at an altitude of about 4,000 feet, the captain reported to Cincinnati TRACON that he had the runway in sight. The approach controller cleared flight 185 for a visual approach to runway 36R and added, "keep your speed up." The captain acknowledged the clearance and the instruction. The first officer then stated, "what in the world is going on with this plane? sucker is acting so funny." The captain replied, "we'll do a full control check on the ground." At 0044:43, the approach controller again told the captain to "keep your speed up" and instructed him to contact the CVG Air Traffic Control Tower (ATCT). At 0045:11, the captain contacted the CVG ATCT and requested clearance to land on runway 36R, and the local control west controller issued the landing clearance. Flight data recorder (FDR) data indicated that, shortly afterward, the airplane passed through about 3,200 feet, and its airspeed began to decrease from about 240 knots indicated airspeed. At 0045:37, when the airplane was at an altitude of about 3,000 feet, the captain started the in-range checklist,8 stating, "bypass is down. hydraulic pressure. quantity checks. AC [alternating current] pump is on. green light. fuel panel. boost pumps on." About 0046, the first officer stated, "I'm telling you, what is wrong with this plane? it is really funny. I got something all messed up here." The captain replied, "yeah." The first officer then asked, "can you feel it? it's like swinging back and forth." The captain replied, "we've got an imbalance on this…crossfeed I left open." The first officer responded, "oh, is that what it is?" A few seconds later, the first officer stated, "we're gonna flame out." The captain responded, "I got the crossfeed open. just keep power on." At 0046:45, the CVR recorded a sound similar to decreasing engine rpm. Immediately thereafter, the first officer stated, "we're losing power." At 0046:52, the first officer stated, "we've lost both of them. did we?" The captain responded, "nope." FDR data showed that, about 1 second later, a momentary electrical power interruption occurred when the airplane was at an altitude of about 2,400 feet. At 0046:55, the CVR stopped recording. Airplane performance calculations indicated that, shortly after the power interruption, the airplane's descent rate was about 900 feet per minute (fpm). According to air traffic control (ATC) transcripts, at 0047:12, the captain reported to the CVG ATCT that the airplane was "having engine problems." The local control west controller asked, "you're having engine problems?" The captain replied, "affirmative." At 0047:28, the controller asked the captain if he needed emergency equipment, and the captain replied, "negative.'" This was the last transmission received by ATC from the accident flight crew. The FDR continued recording until about 0049. The wreckage was located about 1.2 miles short of runway 36R. FINDINGS 1. The captain and first officer were properly certificated and qualified under Federal regulations. 2. No evidence indicated that flight crew fatigue was a factor in this accident, and no evidence indicated any preexisting medical or behavioral conditions that might have affected the accident flight. 3. The airplane was properly maintained in accordance with Federal regulations and approved company procedures. 4. The recovered components showed no evidence of any preexisting powerplant, system, or structural failures. No evidence indicated that any of the airplane's cargo shifted during the flight. 5. Neither the weather nor the inoperative distance measuring equipment on the Cincinnati/Northern Kentucky International Airport very high frequency omnidirectional range was a factor in this accident. 6. Sufficient fuel was on board the airplane for the flight from Memphis International Airport to Cincinnati/Northern Kentucky International Airport. 7. The captain's preflight weight and balance calculations indicated that the airplane was not within takeoff limits; therefore, he should not have allowed the airplane to take off. However, the captain's calculations were incorrect, and the airplane's weight and balance were within limits. 8. The captain did not recognize the importance of the cues provided by the first officer, and he failed to perform expected pilot-in-command duties. 9. The captain was preoccupied with the weight and balance calculations during critical portions of the flight and, as a result, he did not monitor the fuel crossfeed operations, which resulted in a fuel imbalance and unusual airplane handling characteristics. 10. The flight crew did not monitor the fuel quantity gauges or respond properly to the airplane's changing handling characteristics, and the captain did not start the in-range checklist at the appropriate altitude; as a result, the crew missed several opportunities to identify the ongoing fuel crossfeed operations and determine that the airplane's fuel was imbalanced. 11. Although fuel transfer is prohibited on the Convair 580 airplane, fuel transfer can occur during fuel crossfeed operations if the fuel tank shutoff valve for the tank not being used is left open. 12. All of the fuel from the airplane's left tank that was not used by the engines transferred into the right tank because the captain intentionally kept th ## Aircraft - Registration: [N586P](https://openairdocs.org/deregistered/N586P-2007-10-02), registration cancelled 2007-10-02, S/N 68 (OpenAirDocs) - Reported make and model: Convair Div. of Gen. Dynamics CV-340 (580) - Registry model: [General Dynamics CV-580](https://openairdocs.org/model/general-dynamics-cv-580) (registry code 3790242) (OpenAirDocs) - Category: Airplane - Serial number: 68 - Airframe hours: 67948.9 - Engines: Rolls-Royce 501-D13 3750 horsepower turbo prop; Rolls-Royce 501-D13 3750 horsepower turbo prop - Damage: Destroyed - Flight: Part 121 - Operator: Air Tahoma Inc - Registered owner: N580, Inc - Airworthiness certificate: Standard, Transport - Last inspection: Continuous airworthiness, July 1, 2004 - Departed: MEM, Memphis, TN - Destination: CVG, Florence, KY - Flight plan: IFR - Airport: CVG, Cincinnati/Northern Kentucky I, runway 36R, 10,000 × 150 ft, concrete ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 49; injuries: serious; private, airline transport, flight engineer, foreign; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, with waivers/limitations; last flight review July 1, 2004; seat: left; toxicology performed; flight hours: 2,500 total, 1,337 in this make and model, 32 in the last 90 days, 28 in the last 30 days, 2 in the last 24 hours - Co-pilot; age 36; injuries: fatal; flight engineer, commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, without waivers/limitations; last flight review May 1, 2004; seat: right; toxicology performed; flight hours: 924 total, 145 in this make and model, 145 in the last 90 days, 69 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC) - Wind: 0 knots - Visibility: 10 statute miles - Lowest ceiling: 7,500 ft overcast - Temperature: 55 °F, dew point 52 °F - Altimeter: 30.02 inHg ## 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 20040813035189A](https://openairdocs.org/incident/20040813035189A), Aug 13, 2004: Cvac 580, Florence, KY, Destroyed, 1 fatal. (-23) The aircraft departed on time with an enroute time of one hour and twenty five minutes. Some where during the flight the cross feed was activated and the… ## Docket (52 files) The files NTSB released with the investigation on January 23, 2024, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=59897. 35.3 MB in all. - Operations 2-factual report of group chairman (item 1, PDF, 19 pages, 568 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980230&FileExtension=pdf&FileName=Operations%202-Factual%20Report%20of%20Group%20Chairman-Master.pdf - Operations 2-errata 1 to operations factual report (item 2, PDF, 1 page, 66 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980292&FileExtension=pdf&FileName=Operations%202-ERRATA%201%20to%20Operations%20factual%20report-Master.pdf - Operations 2-attachment 1-interview summaries (item 3, PDF, 38 pages, 438 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980232&FileExtension=pdf&FileName=Operations%202-Attachment%201-Interview%20Summaries-Master.pdf - Operations 2-attachment 2-weight and balance control forms found at accident site (item 4, PDF, 3 pages, 158 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980234&FileExtension=pdf&FileName=Operations%202-Attachment%202-Weight%20and%20Balance%20Control%20Forms%20found%20at%20accident%20site-Master.pdf - Operations 2-attachment 3--weight list-or-load plan-left in memphis by captain (item 5, PDF, 2 pages, 248 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980236&FileExtension=pdf&FileName=Operations%202-Attachment%203-Weight%20List-or-Load%20Plan-left%20in%20Memphis%20by%20captain-Master.pdf - Operations 2-attachment 4-excerpt from air tahoma weight and balance manual explaining use of weight and balance for (item 6, PDF, 16 pages, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980238&FileExtension=pdf&FileName=Operations%202-Attachment%204-Excerpt%20from%20Air%20Tahoma%20Weight%20and%20Balance%20Manual%20explaining%20use%20of%20weight%20and%20balance-Master.pdf - Operations 2-attachment 5-excerpt from air tahoma differences manual (item 7, PDF, 2 pages, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980240&FileExtension=pdf&FileName=Operations%202-Attachment%205-Excerpt%20from%20Air%20Tahoma%20Differences%20Manual-Master.pdf - Operations 2-attachment 6-exerpt from air tahoma runway analysis manual (item 8, PDF, 2 pages, 1.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980244&FileExtension=pdf&FileName=Operations%202-Attachment%206-Exerpt%20from%20Air%20Tahoma%20Runway%20Analysis%20Manual-Master.pdf - Operations 2-attachment 7-pictures of convair 580 fuel gauges (item 9, PDF, 5 pages, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980254&FileExtension=pdf&FileName=Operations%202-Attachment%207-Pictures%20of%20Convair%20580%20fuel%20gauges-Master.pdf - Operations 2-attachment 8-nolinor aviation inc fuel crossfeed procedures (item 10, PDF, 2 pages, 24 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980248&FileExtension=pdf&FileName=Operations%202-Attachment%208-Nolinor%20Aviation%20Inc%20Fuel%20Crossfeed%20procedures-Master.pdf - Operations 2-attachment 9-ERA airline visual indicator card of fuel crossfeeding in progress (item 11, PDF, 2 pages, 819 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980258&FileExtension=pdf&FileName=Operations%202-Attachment%209-ERA%20Airline%20visual%20indicator%20card%20of%20fuel%20crossfeeding%20in%20progress-Master.pdf - Operations 2-attachment 10-logbook page of accident airplane for day prior to accident (item 12, PDF, 2 pages, 156 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980266&FileExtension=pdf&FileName=Operations%202-Attachment%2010-Logbook%20page%20of%20accident%20airplane%20for%20day%20prior%20to%20accident-Master.pdf - Operations 2-attachment 11-copy of fueling record for accident airplane (item 13, PDF, 2 pages, 117 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980268&FileExtension=pdf&FileName=Operations%202-Attachment%2011-Copy%20of%20fueling%20record%20for%20accident%20airplane-Master.pdf - Operations 2-attachment 12-copy of flight release for accident flight (item 14, PDF, 2 pages, 181 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980270&FileExtension=pdf&FileName=Operations%202-Attachment%2012-Copy%20of%20Flight%20Release%20for%20accident%20flight-Master.pdf - Operations 2-attachment 13-pages from FAA approved aircraft flight manual for the convair 580 (item 15, PDF, 3 pages, 293 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980296&FileExtension=pdf&FileName=Operations%202-Attachment%2013-Pages%20from%20FAA%20approved%20aircraft%20flight%20manual%20for%20the%20Convair%20580-Master.pdf - Operations 2-attachment 14-nolinor aviation's fuel crossfeeding procedures (item 16, PDF, 3 pages, 383 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980298&FileExtension=pdf&FileName=Operations%202-Attachment%2014-Nolinor%20Aviation%27s%20Fuel%20Crossfeeding%20Procedures-Master.pdf - Operations 2-addendum 1 (item 17, PDF, 4 pages, 152 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980264&FileExtension=pdf&FileName=Operations%202-Addendum%201-Master.pdf - Operations 2-errata to addendum 1 (item 18, PDF, 1 page, 77 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980284&FileExtension=pdf&FileName=Operations%202-Errata%20to%20Addendum%201-Master.pdf - Operations 2-addendum 2 (item 19, PDF, 1 page, 75 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980278&FileExtension=pdf&FileName=Operations%202-Addendum%202-Master.pdf - Operations 2-addendum 3 (item 20, PDF, 2 pages, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980286&FileExtension=pdf&FileName=Operations%202-Addendum%203-Master.pdf - Operations 2-addendum 4 (item 21, PDF, 2 pages, 111 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980294&FileExtension=pdf&FileName=Operations%202-Addendum%204-Master.pdf - Operations 2-addendum 5 crew injury information (item 22, PDF, 2 pages, 10 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980304&FileExtension=pdf&FileName=Operations%202-Addendum%205%20Crew%20Injury%20Information-Master.pdf - Operations 2-addendum 6 two additional interviews (item 23, PDF, 9 pages, 27 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980306&FileExtension=pdf&FileName=Operations%202-Addendum%206%20Two%20Additional%20Interviews-Master.pdf - ATC 3-factual report of group chairman (item 24, PDF, 9 pages, 248 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980282&FileExtension=pdf&FileName=ATC%203-Factual%20Report%20of%20Group%20Chairman-Master.pdf - ATC 3-attachment 2 FAA accident package (item 25, PDF, 53 pages, 4.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980280&FileExtension=pdf&FileName=ATC%203-Attachment%202%20FAA%20Accident%20Package-Master.pdf - ATC 3-attachment 3 hma 185 accident notification (item 26, PDF, 1 page, 157 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980184&FileExtension=pdf&FileName=ATC%203-Attachment%203%20HMA%20185%20Accident%20Notification-Master.pdf - ATC 3-attachment 4 cvg diagram (item 27, PDF, 1 page, 235 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980186&FileExtension=pdf&FileName=ATC%203-Attachment%204%20%20CVG%20Diagram-Master.pdf - ATC 3-attachment 5 radar data (item 28, EXE, 27 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980188&FileExtension=exe&FileName=ATC%203-Attachment%205%20Radar%20Data-Master.exe - Structures 7 - factual report of group chairman (item 29, PDF, 14 pages, 1.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16786888&FileExtension=pdf&FileName=Structures%207-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf - Powerplants 8-factual report of group chairman (item 30, PDF, 11 pages, 158 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980250&FileExtension=pdf&FileName=Powerplants%208-Factual%20Report%20of%20Group%20Chairman-Master.pdf - Systems 9-factual report of group chairman (item 31, PDF, 27 pages, 912 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16784351&FileExtension=pdf&FileName=Systems%209-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf - Systems 9-attachment 1-emergency handle on-site observations (item 32, PDF, 2 pages, 84 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980214&FileExtension=pdf&FileName=Systems%209-Attachment%201-Emergency%20Handle%20On-Site%20Observations-Master.pdf - Systems 9-attachment 2-AIR tahoma CV-580 fuel system diagram (item 33, PDF, 2 pages, 166 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980216&FileExtension=pdf&FileName=Systems%209-Attachment%202-Air%20Tahoma%20CV-580%20Fuel%20System%20Diagram-Master.pdf - Systems 9-attachment 3-photograph of overhead fuel control panel (item 34, PDF, 2 pages, 204 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980218&FileExtension=pdf&FileName=Systems%209-Attachment%203-Photograph%20of%20Overhead%20Fuel%20Control%20Panel-Master.pdf - Systems 9-attachment 4-results of airplane boost pump tests (item 35, PDF, 3 pages, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980220&FileExtension=pdf&FileName=Systems%209-Attachment%204-Results%20of%20Airplane%20Boost%20Pump%20Tests-Master.pdf - Systems 9-attachment 5-allison prop-jet convair service bulletin pjcb 10-21 (item 36, PDF, 4 pages, 1.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980222&FileExtension=pdf&FileName=Systems%209-Attachment%205-Allison%20Prop-Jet%20Convair%20Service%20Bulletin%20PJCB%2010-21-Master.pdf - Systems 9-attachment 6-convair 580 flight deck panel layout (item 37, PDF, 2 pages, 110 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980224&FileExtension=pdf&FileName=Systems%209-Attachment%206-Convair%20580%20Flight%20Deck%20Panel%20Layout-Master.pdf - Systems 9-attachment 7-convair 580 center pedestal annunciator panel (item 38, PDF, 2 pages, 248 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980226&FileExtension=pdf&FileName=Systems%209-Attachment%207-Convair%20580%20Center%20Pedestal%20Annunciator%20Panel-Master.pdf - Systems 9-attachment 8-results of center annunciator panel light bulb examination (item 39, PDF, 4 pages, 142 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980228&FileExtension=pdf&FileName=Systems%209-Attachment%208-Results%20of%20Center%20Annunciator%20Panel%20Light%20Bulb%20Examination-Master.pdf - Systems 9-factual report of group chairman-addendum 1 (item 40, PDF, 4 pages, 189 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980274&FileExtension=pdf&FileName=Systems%209-Factual%20Report%20of%20Group%20Chairman-Addendum%201-Master.pdf - Systems 9-factual report of group chairman-addendum 2 (item 41, PDF, 13 pages, 857 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980276&FileExtension=pdf&FileName=Systems%209-Factual%20Report%20of%20Group%20Chairman-Addendum%202-Master.pdf - Systems 9-factual report of group chairman-addendum 3 (item 42, PDF, 5 pages, 113 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980288&FileExtension=pdf&FileName=Systems%209-Factual%20Report%20of%20Group%20Chairman-Addendum%203-Master.pdf - Systems 9-factual report of group chairman-addendum 3-attachment 1 (item 43, PDF, 15 pages, 612 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980290&FileExtension=pdf&FileName=Systems%209-Factual%20Report%20of%20Group%20Chairman-Addendum%203-Attachment%201-Master.pdf - Flight data recorder 10-FDR specialist's factual report (item 44, PDF, 7 pages, 283 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980206&FileExtension=pdf&FileName=Flight%20Data%20Recorder%2010-FDR%20Specialist%27s%20Factual%20Report-Master.pdf - Flight data recorder 10-FDR specialist's factual report attachment i-csv file of FDR data (item 45, CSV, 2.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=7494189&FileExtension=csv&FileName=Flight%20Data%20Recorder%2010-FDR%20Specialist%27s%20Factual%20Report%20Attachment%20I-CSV%20File%20of%20FDR%20Data-Master-Rel - Maintenance records 11 - factual report of group chairman (item 46, PDF, 5 pages, 90 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16786588&FileExtension=pdf&FileName=Maintenance%20Records%2011-Factual%20Report%20of%20Group%20Chairman-Master-Rel.pdf - Maintenance records 11 - attachment 1 - conformity check and acceptance manual (item 47, PDF, 42 pages, 2.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16786491&FileExtension=pdf&FileName=Maintenance%20Records%2011-Attachment%201-Conformity%20Check%20and%20Acceptance%20Manual-Master-Rel.pdf - Maintenance records 11-attachment 2-serial number verification (item 48, PDF, 10 pages, 962 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16607735&FileExtension=pdf&FileName=Maintenance%20Records%2011-Attachment%202-Serial%20Number%20Verification-Master-Rel.pdf - Maintenance records 11-attachment 3-C check (item 49, PDF, 24 pages, 3.0 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16787645&FileExtension=pdf&FileName=Maintenance%20Records%2011-Attachment%203-C%20Check-Master-Rel.pdf - Maintenance records 11 - attachment 4 - fuel filler cap inspection (item 50, PDF, 5 pages, 1.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16598233&FileExtension=pdf&FileName=Maintenance%20Records%2011-Attachment%204-Fuel%20Filler%20Cap%20Inspection-Master-Rel.pdf - Cockpit voice recorder 12-factual report of group chairman (item 51, PDF, 31 pages, 339 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980262&FileExtension=pdf&FileName=Cockpit%20Voice%20Recorder%2012-Factual%20Report%20of%20Group%20Chairman-Master.pdf - Aircraft performance 13-study of group chairman (item 52, PDF, 23 pages, 1.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=980210&FileExtension=pdf&FileName=Aircraft%20Performance%2013-Study%20of%20Group%20Chairman-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.