# NTSB CEN24FA010: Cessna 414, N880A, Patterson, LA, October 12, 2023

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Class 3 · Field · Final report
- Date: October 12, 2023, 15:21 local (20:21 UTC)
- Place: Patterson, LA · Sugarcane field.
- Coordinates: 29.702526, -91.347746 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=29.7025&lon=-91.3477&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Defining event: [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed, report October 22, 2025
- Report: Approved by Office Director
- Investigation class: Class 3
- NTSB office: Central Region
- Parties: Hartzell Aviation, Textron Aviation, FAA Baton Rouge FSDO, Continental Aerospace Technologies
- NTSB case key (mKey): 193237
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CEN24FA010
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/193237/pdf
- NTSB docket: https://data.ntsb.gov/Docket?ProjectID=193237
- Page: https://openairdocs.org/ntsb/CEN24FA010

## Probable cause

The pilot’s failure to properly set the elevator trim before takeoff, which resulted in an exceedance of the airplane’s critical angle of attack and an aerodynamic stall during takeoff.

## Findings

NTSB's coded findings; those marked are part of the probable cause.

- [Use of equip/info: aircraft control](https://openairdocs.org/ntsb-findings/02063040): Personnel issues › Task performance · Pilot (probable cause); cases with it: [Cessna 414, 6 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md?model=2075908), [All aircraft, 9,295 cases](https://openairdocs.org/ntsb-findings/02063040/cases.md)
- [Action: incorrect action selection](https://openairdocs.org/ntsb-findings/02041010): Personnel issues › Action/decision · Pilot (probable cause); cases with it: [Cessna 414, 1 case](https://openairdocs.org/ntsb-findings/02041010/cases.md?model=2075908), [All aircraft, 397 cases](https://openairdocs.org/ntsb-findings/02041010/cases.md)
- [Attention/monitoring: task monitoring/vigilance](https://openairdocs.org/ntsb-findings/02021520): Personnel issues › Psychological · Pilot (probable cause); cases with it: [Cessna 414, 2 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md?model=2075908), [All aircraft, 330 cases](https://openairdocs.org/ntsb-findings/02021520/cases.md)
- [Flight control system: elevator control system](https://openairdocs.org/ntsb-findings/01022730): Aircraft › Aircraft systems · Incorrect use/operation (probable cause); cases with it: [Cessna 414, 3 cases](https://openairdocs.org/ntsb-findings/01022730/cases.md?model=2075908), [All aircraft, 74 cases](https://openairdocs.org/ntsb-findings/01022730/cases.md)
- [Performance/control parameters: angle of attack](https://openairdocs.org/ntsb-findings/01062042): Aircraft › Aircraft oper/perf/capability · Capability exceeded (probable cause); cases with it: [Cessna 414, 2 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md?model=2075908), [All aircraft, 990 cases](https://openairdocs.org/ntsb-findings/01062042/cases.md)

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Prior to flight: Miscellaneous/other](https://openairdocs.org/ntsb-events/900); cases with it: [Cessna 414, 3 cases](https://openairdocs.org/ntsb-events/900/sequence.md?model=2075908), [All aircraft, 1,556 cases](https://openairdocs.org/ntsb-events/900/sequence.md)
- [Takeoff: Loss of control in flight](https://openairdocs.org/ntsb-events/240) (defining event); cases with it: [Cessna 414, 4 cases](https://openairdocs.org/ntsb-events/240/sequence.md?model=2075908), [All aircraft, 5,002 cases](https://openairdocs.org/ntsb-events/240/sequence.md)
- [Takeoff: Aerodynamic stall/spin](https://openairdocs.org/ntsb-events/241); cases with it: [Cessna 414, 3 cases](https://openairdocs.org/ntsb-events/241/sequence.md?model=2075908), [All aircraft, 1,529 cases](https://openairdocs.org/ntsb-events/241/sequence.md)
- [Uncontrolled descent: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Cessna 414, 8 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=2075908), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md)
- [Post-impact: Explosion (post-impact)](https://openairdocs.org/ntsb-events/180); cases with it: [Cessna 414, 2 cases](https://openairdocs.org/ntsb-events/180/sequence.md?model=2075908), [All aircraft, 47 cases](https://openairdocs.org/ntsb-events/180/sequence.md)
- [Post-impact: Fire/smoke (post-impact)](https://openairdocs.org/ntsb-events/170); cases with it: [Cessna 414, 2 cases](https://openairdocs.org/ntsb-events/170/sequence.md?model=2075908), [All aircraft, 354 cases](https://openairdocs.org/ntsb-events/170/sequence.md)

## Analysis

The airplane landed at the airport and the pilot taxied to the ramp, boarded the passenger without shutting down the airplanes’ engines, then taxied back out to the runway and the airplane departed. Video footage captured part of the accident sequence, showing the airplane descending in an extreme, nose-low attitude while rolling through inverted, consistent with uncontrolled flight, and impacting a field near the departure end of the runway. A witness, who was driving in her vehicle near an intersection just to the west of the airport, observed the airplane shortly after it departed from the runway. She observed the airplane was “tilted to the left,” turned on its side, and then entered a nosedive. She observed the airplane impact a field, explode, and both the wreckage and surrounding area caught fire. Examination of the airframe did not reveal any preimpact mechanical malfunctions or failures. During the examination, the elevator trim was found in a significant nose up position. The elevator trim was likely left at the setting from when the airplane landed at the airport just prior. While the pilot might have been distracted with getting the passenger settled in the airplane, and/or may have been in a rush, the investigation was unable to determine why the pilot did not set the elevator trim before takeoff. The takeoff checklist for the airplane included instructions to properly set the trim tabs before takeoff. The elevator trim position likely resulted in the airplane's nose-up attitude, which led to an exceedance of the airplane's critical angle of attack and an aerodynamic stall during the takeoff. While multiple valve springs from the right engine were found fractured from fatigue cracking, examination of the propellers showed the degree of damage was similar between left and right propellers, suggesting engine power symmetry at the time of impact. For example, chordwise/rotational scoring, leading edge gouging, and blade retention pocket damage indicated rotation at the time of impact. Internal impact marks indicated the propeller blade angle was in the low range of normal operation during the impact sequence. The damage signatures were consistent with forceful rotation toward low blade angle and at low to moderate power condition on both propellers at the time of impact. The pilot had a history of high blood pressure and diabetes. There is no evidence that these conditions were causing impairment at the time of the accident, although they do indicate somewhat elevated general cardiovascular risk, autopsy assessment of which was limited by injury. The pilot also had used the antidepressant medication sertraline, which was not among the medications reported at his last aviation medical examination. Whether he was experiencing any impairing effects of an underlying condition such as depression, or any adverse side effects of sertraline use, is unknown.

## Factual narrative

The FAA Airplane Flying Handbook (FAA-H-8083-3C) discusses when an elevator stall may occur and states, in part: This situation may occur during a go-around procedure from a normal landing approach or a simulated, forced-landing approach, or immediately after a takeoff, with the trim set for a normal landing approach glide at idle power. According to FAA registration records, the pilot purchased the airplane on May 23, 2018. A review of the maintenance records identified a customer invoice dated July 20, 2023, that listed multiple maintenance discrepancies with the airplane that were not resolved within that work order. One of the unresolved discrepancies included, “the right-hand tachometer is not indicating.” The maintenance records indicated that an annual inspection of the airframe, engines, and propellers was completed on April 1, 2023. The FAA-approved Cessna 414 Airplane Flight Manual lists the required before takeoff checklist, which includes “Trim Tabs – Set.” The airplane was not equipped with a crashworthy voice or data recorder, nor was it required to be. On October 12, 2023, about 1521 central daylight time, a Cessna 414 airplane, N880A, was destroyed when it was involved in an accident near Patterson, Louisiana. The commercial pilot and the pilot-certificated passenger sustained fatal injuries. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. According to the pilot’s family, the purpose of the flight was to transport the passenger to the Sugarland Regional Airport (SGR), Houston, Texas, where a family member would pick him up. According to the passenger’s family, the purpose of the flight was for the passenger to travel to Houston for a medical appointment. A review of ADS-B data showed that the airplane departed from the Gonzales Regional Airport (REG), Gonzales, Louisiana, at 1456 and landed at 1511 at the Harry P. Williams Memorial Airport (PTN), Patterson, Louisiana. According to the PTN airport manager, the airplane taxied over to the fixed-base operator and remained at idle while the passenger boarded the airplane. Video footage showed that the passenger pulled a rolling suitcase out to the airplane. Once the passenger boarded, the pilot then got out of the airplane and walked over to the left side, where he appeared to look at something on the airplane. The pilot then boarded the airplane and taxied to runway 24 for departure. The pilot announced on the airport common traffic advisory frequency that the airplane was departing runway 24, and no further radio transmissions were heard from the airplane. No ADS-B data were available for the airplane’s takeoff. Video footage captured part of the accident sequence, showing the airplane in an extreme, nose-low attitude while rolling through inverted and impacting a field near the departure end of runway 24. A witness, who was driving in her vehicle near an intersection just to the west of PTN, observed the airplane shortly after itdeparted from runway 24. She observed that the airplane was “tilted to the left,” turned on its side, and then entered a nosedive. She observed the airplane impact a field, explode, and both the wreckage and surrounding area caught fire. She could not tell if the airplane’s engines sounded abnormal before impact, as she was driving at the time, nor did she observe any smoke or flames emitting from the airplane before impact. She said that, from her position, it did not appear that the airplane was trying to turn back to the airport. At the pilot’s last aviation medical examination on March 10, 2023, he reported a history of high blood pressure, which was noted to be qualified under Conditions Aviation Medical Examiners Can Issue (CACI) criteria. He reported using the prescription blood pressure medications losartan and amlodipine. He was issued a second-class medical certificate without limitation. He also had a past history of diabetes no longer requiring medication after weight loss. Parish Forensics performed the pilot’s autopsy for St. Mary Parish. According to the pilot’s autopsy report, his cause of death was multiple blunt force injuries and his manner of death was accident. The pilot’s postmortem FAA toxicology testing detected sertraline and its metabolite desmethylsertraline, as well as amlodipine and chlorthalidone, in muscle and liver tissue. Sertraline is a prescription antidepressant medication of the selective serotonin reuptake inhibitor (SSRI) class. Desmethylsertraline is a metabolite of sertraline. Sertraline commonly is used to treat depression and may also be used to treat a variety of other conditions. Major depression can cause cognitive impairment, particularly of executive function. By contrast, sertraline has low potential to cause cognitive or psychomotor impairment and may improve such impairment in individuals with major depression. Sertraline’s side effects may include dizziness and drowsiness, and the drug typically carries a warning that users should not drive, operate heavy machinery, or do other dangerous activities until they know how the drug affects them. Amlodipine and chlorthalidone are prescription medications commonly used to help control high blood pressure. They are not generally considered impairing. The estimated density altitude for PTN was 1,397 ft. The pilot’s logbooks were not available for review. The airplane came to rest about 0.32 mile southwest from the departure end of runway 24. The wreckage was destroyed by the postimpact fire. All major structural components of the airplane were located at the accident site. Airframe Examination of the airframe revealed flight control continuity from the control surfaces (aileron, rudder, elevator, aileron trim, rudder trim, and elevator trim) to their respective attachment points in the cockpit. The cockpit and the airframe fuel system were destroyed. The elevator trim tab was deflected down about 2.3 inches, and the elevator trim actuator showed about1.3 inches of extension. According to the airframe manufacturer, this amount of elevator trim actuator extension corresponded to an elevator trim tab deflection of about 15° tab down (meaning that the airplane was trimmed nose up). The flaps and the main landing gear were found in the retracted position. Engines The crankshaft for each engine was manually rotated using a bit inserted in the rear accessory drive port, and continuity of the crankshaft to the rear gears and to the valvetrain was confirmed for both engines. Thumb compression and suction were observed for all six cylinders for both engines. The interiors of the cylinders on both engines were observed using a lighted borescope and no anomalies of concern were noted. All magnetos produced sparks from all ignition towers when the magneto drive assemblies were rotated during crankshaft rotation. Multiple valve springs on the right engine were found fractured. Metallurgical examination revealed that the valve springs fractured from fatigue cracking that initiated at corrosion pits on the exterior of the valve springs. These corrosion pits contained iron oxides and salt elements typical of those found in the pitting corrosion of steel components. Turbochargers Both turbochargers exhibited remarkable rotational scoring marks on the compressor housings with corresponding blade damage consistent with the turbochargers turning at high rpm at the time of impact. There was nothing found during examination of either turbocharger that would preclude normal operation. Propellers Both left and right propellers separated from their respective engine during the impact sequence; all propeller components were accounted for near the main wreckage. Damage to both left and right propellers was similar. Leading edge gouging and chordwise/rotational scoring were consistent with rotation. Blade bending and twisting characteristics were also consistent with the engine producing power at the time of impact. Knob and fork impact marks on the preload plates of both propellers were consistent with the propeller blade angle being in the lower range of normal operation during the impact sequence. There were no indications that either propeller was at or near the feathered position. Avionics Examination of the Shadin Digiflo-L Fuel Flow Indicator showed that 14.6 gallons of fuel was used, and 148.4 gallons of fuel remained.

## Aircraft

- Registration: [N880A](https://openairdocs.org/aircraft/N880A), registered now, S/N 414-0397, built 1973 (OpenAirDocs)
- Reported make and model: CESSNA 414 (UNDESIGNATED SERIES)
- Registry model: [Cessna 414](https://openairdocs.org/model/cessna-414) (registry code 2075908) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 414-0397
- Year built: 1973
- Airframe hours: 8787.1
- Engines: Continental Motors TSIO-520-NCNB 310 horsepower reciprocating; Continental Motors TSIO-520-NCNB 310 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: MJ Aviation LLC
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, April 1, 2023
- Departed: PTN, Patterson, LA
- Destination: SGR, Sugar Land, TX
- Airport: PTN, Harry P Williams Meml, runway 06/24, 5,399 × 150 ft, asphalt
- Equipment: Stall warning system, ADS-B, Data recorder

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 48; injuries: fatal; commercial, flight instructor, remote; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, without waivers/limitations; seat: left; toxicology performed; flight hours: 985 total
- Pilot-rated passenger; age 69; injuries: fatal; private; airplane ratings: single-engine sea, single-engine land; medical: class 3, with waivers/limitations; seat: right; toxicology performed; flight hours: 775 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 5 knots
- Visibility: 10 statute miles
- Temperature: 73 °F, dew point 63 °F
- Altimeter: 29.74 inHg
- Observed at: KPTN, 1 nm away
- METAR: KPTN 122011Z AUTO 08005KT 10SM SCT022 23/17 A2974

## 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 20231012018219A](https://openairdocs.org/incident/20231012018219A), Oct 12, 2023: Cessna 414, Patterson, LA, Destroyed, 2 fatal. Shortly after takeoff under visual flight rules [privacy data omitted]experienced an emergency event. During climb out, the aircraft crashed into a sugarcane…

## Docket (27 files)

The files NTSB released with the investigation on October 22, 2025, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=193237. 248 MB in all.

- Various statements (item 1, PDF, 6 pages, 247 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19296585&FileExtension=pdf&FileName=Various%20Statements_Redacted-Rel.pdf
- Accident video 1 (courtesy of the harry p. williams memorial airport) (item 2, MP4, 16.2 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19166124&FileExtension=mp4&FileName=PTN%20Video%20N880A%20-%201-Rel.mp4
- Accident video 2 (courtesy of the harry p. williams memorial airport) (item 3, MP4, 19.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19166403&FileExtension=mp4&FileName=PTN%20Video%20N880A%20-%202-Rel.mp4
- Accident video 3 (courtesy of the harry p. williams memorial airport) (item 4, MP4, 8.7 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19166295&FileExtension=mp4&FileName=PTN%20Video%20N880A%20-%203-Rel.mp4
- Home video 1 (courtesy of a witness) (item 5, MP4, 29.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312924&FileExtension=mp4&FileName=Witness%20Video%201-Rel.mp4
- Home video 2 (courtesy of a witness) (item 6, MP4, 29.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312630&FileExtension=mp4&FileName=Witness%20Video%202-Rel.mp4
- Investigation photographs (item 7, PDF, 13 pages, 6.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312162&FileExtension=pdf&FileName=Investigation%20Photographs-Rel.pdf
- First flight - ADS-B data (google earth file) (item 8, KMZ, 40 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19161300&FileExtension=kmz&FileName=20231012_AC1DD5_530154205-Rel.kmz
- First flight - ADS-B data (microsoft excel file) (item 9, XLSX, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19161310&FileExtension=xlsx&FileName=20231012_AC1DD5_530154205_ADSB-Rel.xlsx
- NTSB - N880A airframe and engines examination report (item 10, PDF, 12 pages, 245 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312934&FileExtension=pdf&FileName=CEN24FA010%20Examination%20Report-Rel.pdf
- Hartzell propeller - N880A propellers examination report (item 11, PDF, 25 pages, 3.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19304347&FileExtension=pdf&FileName=CEN24FA010%20Hartzell%20Propeller%20Report%20No%20231012_Redacted-Rel.pdf
- Hartzell engine technologies - N880A turbochargers examination report (item 12, PDF, 4 pages, 402 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19304629&FileExtension=pdf&FileName=CEN24FA010HET%20Turbo%20Exam%20Notes_Redacted-Rel.pdf
- N880A - glencoe aviation known issues (item 13, PDF, 3 pages, 917 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19166134&FileExtension=pdf&FileName=Glencoe%20Aviation%20-%20N880A%20Known%20Issues_Redacted-Rel.pdf
- N880A - recent airframe maintenance records (item 14, PDF, 7 pages, 16.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312427&FileExtension=pdf&FileName=Recent%20Airframe%20Maintenance%20Records_Redacted-Rel.pdf
- N880A - recent left engine maintenance records (item 15, PDF, 5 pages, 11.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312505&FileExtension=pdf&FileName=Recent%20Left%20Engine%20Maintenance%20Records_Redacted-Rel.pdf
- N880A - recent left propeller maintenance records (item 16, PDF, 4 pages, 8.9 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312471&FileExtension=pdf&FileName=Recent%20Left%20Propeller%20Maintenance%20Records_Redacted-Rel.pdf
- N880A - recent right engine maintenance records (item 17, PDF, 5 pages, 11.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312620&FileExtension=pdf&FileName=Recent%20Right%20Engine%20Maintenance%20Records_Redacted-Rel.pdf
- N880A - recent right propeller maintenance records (item 18, PDF, 4 pages, 8.8 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312481&FileExtension=pdf&FileName=Recent%20Right%20Propeller%20Maintenance%20Records_Redacted-Rel.pdf
- N880A - weight and balance documents (item 19, PDF, 2 pages, 46.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19312300&FileExtension=pdf&FileName=WB_Redacted-Rel.pdf
- N880A - recent fueling information (item 20, PDF, 8 pages, 6.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19296850&FileExtension=pdf&FileName=Recent%20Fueling%20Information_Redacted-Rel.pdf
- Cessna - 414 airplane flight manual excerpts (item 21, PDF, 5 pages, 11.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19311807&FileExtension=pdf&FileName=Cessna%20414%20AFM%20Excerpts-Rel.pdf
- Electronic device - specialist's email report (item 22, PDF, 2 pages, 2 photos, 230 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=16895564&FileExtension=pdf&FileName=CEN24FA010_fuel_flow_EmailReport-Rel.pdf
- Meteorology information (item 23, PDF, 2 pages, 205 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19167080&FileExtension=pdf&FileName=CEN24FA010%20-%20Weather%20Information_Redacted-Rel.pdf
- Materials laboratory factual report (item 24, PDF, 21 pages, 28 photos, 6.6 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=17581443&FileExtension=pdf&FileName=24-051%20-%20Materials%20Lab%20Factual%20Report%20(CEN24FA010)-Rel.pdf
- Pilot - toxicological report (item 25, PDF, 1 page, 162 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19296768&FileExtension=pdf&FileName=Pilot%20-%20FAA%20Toxicology%20Report_Redacted-Rel.pdf
- Statement of party representatives to NTSB investigation (item 26, PDF, 3 pages, 1.4 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19165772&FileExtension=pdf&FileName=NTSB%20Party%20Member%20Forms_Redacted-Rel.pdf
- Southern aircraft recovery - wreckage recovery and release information (item 27, PDF, 2 pages, 90 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=19165694&FileExtension=pdf&FileName=CEN24FA010%20Wreckage%20Recovery%20and%20Release%20MOR-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.
