Cases › ENG10IA010 › The analyst
ATR ATR72American Airlines
What the docket says, assembled. No language model is involved, so nothing on this page can be invented — every line traces to a recorder, a report page or the Board's own record.
7
timed facts
8
precedents
10
passages to ask
Ask the docket
passages, not paraphrasesTry
Every answer is a passage of the docket with the page it came from, or the words “not in the docket”. Nothing is summarised or reasoned for you — read the source.
One timeline
7 timed factsthe recorder events from the FDR report, with the transcript's warnings, callouts, the words nearest each event and the final seconds — on one clock, as printed in each report- 19:36:38FDRTakeoffp.3Aircraft took offsee the traces at this moment ↗
- ~19:39:38FDRClimbp.3Autopilot engaged about 3 minutes after takeoffsee the traces at this moment ↗
- 19:41:13FDRIn-flight emergencyp.3Left engine fire warning started on the FDR, continuing until just after touchdown; master warning also indicated at this time and remained on for 6 secondssee the traces at this moment ↗
- 19:41:25FDRIn-flight emergencyp.3Autopilot disengagedsee the traces at this moment ↗
- ~19:41:27FDRIn-flight emergencyp.3Left engine power lever angle began to decrease, followed by left engine power decreasesee the traces at this moment ↗
- ~19:41:37FDRIn-flight emergencyp.3Left engine propeller RPM reading began registering invalid data about 10 seconds after PLA began decreasingsee the traces at this moment ↗
- 19:47:31FDRLandingp.3Aircraft touched downsee the traces at this moment ↗
Recorder events without a clock time
- unspecifiedLeft engine torque reached 0% and remained at that value for the rest of the flight
Flight Data Recorder 10 - Specialist's Factual Report · 8 events extracted by claude-sonnet-5
How the Board coded the sequence
- Takeoff: Fire/smoke (non-impact)
Precedents
8 closest casesranked by what happened, in the Board's words, and by the findings and occurrences it coded- BOEING 737-9 · United AirlinesNewark, NJ
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - EMBRAER ERJ 190-100 IGW · JetBlue AirwaysNassau, BS
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOEING 757 232 · Delta Air LinesLas Vegas, NV
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOEING 757-2Q8 · DELTA AIR LINES INCMinneapolis, MN
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOEING 757 · DELTA AIR LINES INCJamaica, NY
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOEING 757-222 · UNITED AIR LINES INCDenver, CO
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOEING 767 · American AirlinesJamaica, NY
- ●Aircraft › Aircraft power plant › Engine fuel and control
Fire/smoke (non-impact) - BOMBARDIER CL600 2C10 · ATLANTIC SOUTHEAST AIRLINES INCAtlanta, GAFire/smoke (non-impact)
What the record says
a pattern, not a findingacross the 8 closest cases · 8 carry coded findings · 8 have a probable causeFindings the Board cited in those cases
- 7 of 8Aircraft › Aircraft power plant › Engine fuel and controlcited here too
Occurrences it coded
- 8 of 8Fire/smoke (non-impact)
- 2 of 8Powerplant sys/comp malf/fail
Set against the Board’s own findings for this case
Cited here, and common in the precedents
- Aircraft power plant › Engine fuel and control
Cited here, not seen in the precedents
- Aircraft power plant › Engine (turbine/turboprop)
Common in the precedents, not cited here
- —
A teaching device, not a verdict: what the record would have looked at, next to what the Board found.
In the Board’s words — the closest cases
- ENG23LA0312023-06-28 · BOEING 737-9 · United Airlines
A No. 1 (left) engine fire due a fuel leak that originated from the fuel nozzle 17 b-nut connection that was not properly torqued in accordance with the aircraft maintenance manual procedure.
- ENG09IA0172009-09-03 · EMBRAER ERJ 190-100 IGW · JetBlue Airways
failure of the engine high pressure turbine active clearance control valve fuel rod supply tube coupling seal due to a cross-threaded B-nut as installed during original manufacture.
- ENG17IA0362017-09-06 · BOEING 757 232 · Delta Air Lines
A No. 1 (left) engine undercowl fire caused by a fuel nozzle installation error during engine overhaul at Delta TechOps. A fuel nozzle b-nut was cross threaded, which allowed fuel to leak on hot engine case surfaces and subsequently ignite.
- ENG11IA0162011-02-09 · BOEING 757-2Q8 · DELTA AIR LINES INC
the failure of the right engine's fuel control unit to operate correctly when the fuel metering valve became frozen in the full open position because of corrosion on the fuel metering valve slide and sleeve, which caused the engine to be overfueled during engine start and resulted in a tailpipe fire.
- ENG16IA0272016-07-07 · BOEING 757 · DELTA AIR LINES INC
Maintenance personnel's failure to ensure proper installation of a fuel tube O-ring, which resulted in an undercowl engine fire during initial climb.
What it recommended after them
- A-12-047TO THE FEDERAL AVIATION ADMINISTRATION: Issue an airworthiness directive to require the incorporation of General Electric Aircraft Engines Service Bulletin 73-0242, “Fuel and Control – (73-00-00) – Spray Shields and Support Bracket – Improv… · ENG12IA010Closed - Acceptable Action
This is the pattern in the NTSB’s own record across similar accidents — which findings it cited, what it coded, what it recommended. It is drawn from the record, not written about this case, and it never assigns blame: investigations exist to prevent the next accident (ICAO Annex 13).