# CFM International CFM56-5B6 series

- Type: Engine model (FAA registry)
- Registry code: 13017
- Manufacturer (registry): CFM INTL
- Model: CFM56-5B6
- Engine type: Turbo-fan
- Power: 23,500 lb thrust
- Installed in: 16 registered aircraft
- Page: https://openairdocs.org/engine/cfm-international-cfm56-5b6-series

The registry names only the engine series, so ADs for every model in the series are matched.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2023-05-05](https://openairdocs.org/ad/2023-05-05): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 98 more. Effective May 10, 2023
- [AD 2021-16-08](https://openairdocs.org/ad/2021-16-08): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 55 more. Effective Sep 28, 2021
- [AD 2017-05-09](https://openairdocs.org/ad/2017-05-09): Accessory Gearboxes · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 33 more. Effective Apr 13, 2017
- [AD 2016-02-04](https://openairdocs.org/ad/2016-02-04): Turbine rear frames (TRFs) · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 33 more. Effective Mar 1, 2016
- [AD 2013-14-06](https://openairdocs.org/ad/2013-14-06): Hydro-mechanical unit (HMU) fuel control · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 34 more. Effective Sep 3, 2013
- [AD 2012-02-03](https://openairdocs.org/ad/2012-02-03): Engine · CFM International CFM56-5B1/3, CFM56-5B2/3, CFM56-5B3/3 and 8 more. Effective Mar 15, 2012
- [AD 2010-13-09](https://openairdocs.org/ad/2010-13-09): Stage 3 low-pressure turbine (LPT) · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 88 more. Effective Jul 26, 2010
- [AD 2010-09-14](https://openairdocs.org/ad/2010-09-14): Exhaust gas temperature (EGT) · CFM International CFM56-5B1/2P, CFM56-5B1/P, CFM56-5B2/2P and 16 more. Effective Jun 8, 2010
- [AD 2009-18-01](https://openairdocs.org/ad/2009-18-01): LP turbine rear frames · CFM International CFM56-5B1/3, CFM56-5B1/P, CFM56-5B2/3 and 19 more. Effective Oct 1, 2009
- [AD 2009-11-02](https://openairdocs.org/ad/2009-11-02): HPC 4-9 spools · CFM International CFM56-2, CFM56-2A, CFM56-2B and 109 more. Effective Jun 23, 2009
- [AD 2007-03-15](https://openairdocs.org/ad/2007-03-15): Exhaust gas temperature (EGT) harness · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 34 more. Effective Mar 19, 2007
- [AD 2006-26-01](https://openairdocs.org/ad/2006-26-01): Fuel filters · CFM International CFM56-2, CFM56-2A, CFM56-2B and 93 more. Effective Jan 3, 2007
- [AD 2005-10-05](https://openairdocs.org/ad/2005-10-05): Air turbine starters · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 50 more. Effective Jun 14, 2005
- [AD 2002-16-18](https://openairdocs.org/ad/2002-16-18): Low pressure turbine (LPT) nozzle segments · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 33 more. Effective Sep 18, 2002
- [AD 2002-13-03](https://openairdocs.org/ad/2002-13-03): Turbofan Engines · CFM International CFM56-2, CFM56-2A, CFM56-2B and 55 more. Effective Aug 1, 2002
- [AD 2002-02-13](https://openairdocs.org/ad/2002-02-13): Magnetic Drain Plug · CFM International CFM56-5, CFM56-5-A1/F, CFM56-5A4 and 33 more. Effective Mar 21, 2002
- [AD 2001-11-05](https://openairdocs.org/ad/2001-11-05): No. 4 Bearings · CFM International CFM56-2, CFM56-2B, CFM56-3 and 45 more. Effective Jun 11, 2001
- [AD 2000-15-01](https://openairdocs.org/ad/2000-15-01): Fuel Leakage · CFM International CFM56-2, CFM56-2A, CFM56-2B and 39 more. Effective Oct 2, 2000
- [AD 98-10-11](https://openairdocs.org/ad/98-10-11): Accessory Gearbox · CFM International CFM56-3, CFM56-3B, CFM56-3C and 31 more. Effective Jun 3, 1998
- [AD 97-06-01](https://openairdocs.org/ad/97-06-01): High Pressure Compressor Rotor (HPCR) Stage 1-2 Spool · CFM International CFM56-5, CFM56-5B1, CFM56-5B1/2P and 28 more. Effective Jun 3, 1997

Historical (superseded or no longer in force):

- [AD 2021-10-09](https://openairdocs.org/ad/2021-10-09) (historical): Turbine Engine Compressor Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/3 and 82 more. Effective Jun 24, 2021
- [AD 2019-12-05](https://openairdocs.org/ad/2019-12-05) (historical): Turbine Section · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 39 more. Effective Jul 5, 2019
- [AD 2009-01-01](https://openairdocs.org/ad/2009-01-01) (historical): Exhaust gas temperature (EGT) · CFM International CFM56-5B1, CFM56-5B1/2P, CFM56-5B1/P and 22 more. Effective Dec 31, 2008
- [AD 2000-12-01](https://openairdocs.org/ad/2000-12-01) (historical): Critical Life-Limited Parts · CFM International CFM56-2, CFM56-2A, CFM56-2B and 54 more. Effective Dec 11, 2000

## Information bulletins (advisory) (3)

- [SAIB NE-08-17R3](https://openairdocs.org/saib/NE-08-17R3): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued May 28, 2014
- [SAIB NE-12-29](https://openairdocs.org/saib/NE-12-29): Engine Fuel Distribution  CFM56-5B LPTACC Fuel Manifold. Issued Apr 27, 2012
- [SAIB NE-08-17R2](https://openairdocs.org/saib/NE-08-17R2) (historical): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued Mar 7, 2011

## Registered aircraft (16)

- [N3014R](https://openairdocs.org/aircraft/N3014R): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5842
- [N324NV](https://openairdocs.org/aircraft/N324NV): [Sunrise Asset Management LLC](https://openairdocs.org/faa-owner/SUNRISE%20ASSET%20MANAGEMENT%20LLC), [Las Vegas, NV](https://openairdocs.org/faa-place/NV/Las%20Vegas), built 2006, S/N 2709
- [N325NV](https://openairdocs.org/aircraft/N325NV): [Sunrise Asset Management LLC](https://openairdocs.org/faa-owner/SUNRISE%20ASSET%20MANAGEMENT%20LLC), [Las Vegas, NV](https://openairdocs.org/faa-place/NV/Las%20Vegas), S/N 2729
- [N4005X](https://openairdocs.org/aircraft/N4005X): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5753
- [N527VA](https://openairdocs.org/aircraft/N527VA): [Umb Bank Na Trustee](https://openairdocs.org/faa-owner/UMB%20BANK%20NA%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2008, S/N 3417
- [N778XF](https://openairdocs.org/aircraft/N778XF): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2009, S/N 4127
- [N8001N](https://openairdocs.org/aircraft/N8001N): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5678
- [N8009T](https://openairdocs.org/aircraft/N8009T): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5788
- [N9002U](https://openairdocs.org/aircraft/N9002U): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5698
- [N9004F](https://openairdocs.org/aircraft/N9004F): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5745
- [N9008U](https://openairdocs.org/aircraft/N9008U): [Umb Bank Na Trustee](https://openairdocs.org/faa-owner/UMB%20BANK%20NA%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2013, S/N 5786
- [N9010R](https://openairdocs.org/aircraft/N9010R): [Umb Bank Na Trustee](https://openairdocs.org/faa-owner/UMB%20BANK%20NA%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2013, S/N 5789
- [N9011P](https://openairdocs.org/aircraft/N9011P): [Wilmington Trust Co Trustee](https://openairdocs.org/faa-owner/WILMINGTON%20TRUST%20CO%20TRUSTEE), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 2013, S/N 5798
- [N9012](https://openairdocs.org/aircraft/N9012): [American Airlines Inc](https://openairdocs.org/faa-owner/AMERICAN%20AIRLINES%20INC), [Fort Worth, TX](https://openairdocs.org/faa-place/TX/Fort%20Worth), built 2013, S/N 5810
- [N9013A](https://openairdocs.org/aircraft/N9013A): [Umb Bank Na Trustee](https://openairdocs.org/faa-owner/UMB%20BANK%20NA%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2013, S/N 5827
- [N93003](https://openairdocs.org/aircraft/N93003): [Umb Bank Na Trustee](https://openairdocs.org/faa-owner/UMB%20BANK%20NA%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2013, S/N 5704

## NTSB investigations (5)

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.

- [NTSB ENG26LA018](https://openairdocs.org/ntsb/ENG26LA018), Feb 11, 2026: Airbus A319 (N9010R), Charlotte, NC, incident, investigation ongoing
- [NTSB DCA23WA087](https://openairdocs.org/ntsb/DCA23WA087), Dec 2, 2022: Airbus A319-115 (N3014R), Barranquilla, Colombia, incident, no damage
- [NTSB DCA18CA043](https://openairdocs.org/ntsb/DCA18CA043), Dec 3, 2017: Airbus A319 115 (N9011P), Miami, FL, minor damage. Probable cause: The failure of the flight crew of N9011P to maintain an appropriate clearance from N344PP, which was stopped on the taxiway.
- [NTSB DCA16CA209](https://openairdocs.org/ntsb/DCA16CA209), Aug 3, 2016: Airbus A319 115 (N9010R), Grand Cayman Island (GCM), Cayman Islands, no damage. Probable cause: an inadvertent encounter with clear air turbulence.
- [NTSB DCA16CA030](https://openairdocs.org/ntsb/DCA16CA030), Dec 10, 2015: Airbus A319 115 (N3014R), Great Falls, MT, no damage. Probable cause: an encounter with turbulence during initial descent.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Incident 20250802009859I](https://openairdocs.org/incident/20250802009859I), Aug 2, 2025: Airbus A319-112 (N325NV), St. Petersburg, FL, Minor damage. Just prior to takeoff roll, airport operations had bird dispersal vehicle on runway 36. During takeoff, just after rotation, aircraft ingested bird, or birds,…

## Service difficulty reports (280, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR AALA202609064238](https://openairdocs.org/sdr/AALA202609064238), Sep 1, 2026: DUCT. DISCONNECTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY DECLARED & ACFT RETURNED TO PHL DUE THE FLT CREW REPORTING ON TAKEOFF ENG 2 HAD A VERY SLOW SPOOL UP MORE SO THAN NORMAL & O
- [SDR AALA202607066305](https://openairdocs.org/sdr/AALA202607066305), Jul 1, 2026: DUCT. BLOWN. AIRCRAFT GROUNDED: AN EMERGENCY DECLARED & ACFT RETURNED TO MIA DUE TO FLT CREW REPORTED THAT AT V1, LT ENG FIRE FAULT CAME ON TWICE. FLT CREW ACCOMP CHKLST & S
- [SDR AALA202601107690](https://openairdocs.org/sdr/AALA202601107690), Jan 6, 2026: SEAL. LEAKING. AIRCRAFT WAS GROUNDED: FAIRLY RAPID DECREASE NUMBER 1 ENGINE OIL QUANTITY IN CRUISE FLIGHT LEVEL 360. REDUCED THRUST ON NUMBER 1 WHEN OIL QUANTITY REACHED 4QTS 
- [SDR QEMY20250905001](https://openairdocs.org/sdr/QEMY20250905001), Sep 3, 2025: HUB. CRACKED. DURING INCOMING INSPECTION AT GE WALES, DEFECTS ON THE FAN FRAME HAVE BEEN NOTED. INNER HUB OF FAN FRAME FOUND CRACKED ON SURFACE L FLANGE IN 2 OFF LOCATIONS. I
- [SDR AALA202410244078](https://openairdocs.org/sdr/AALA202410244078), Oct 23, 2024: ENGINE. STALLED. AIRCRAFT WAS GROUNDED: DURING DESCENT INTO PIT, GOT ENG 2 COMPRESSOR VANE ECAM. CLEARED ON ITS OWN THEN CAME BACK ABOUT 30 SECS LATER. SHORTLY AFTERWHILE DESCEN
- [SDR AALA202410284078](https://openairdocs.org/sdr/AALA202410284078), Oct 23, 2024: MOTOR. INOPERATIVE. AIRCRAFT WAS GROUNDED: DURING DESCENT INTO PIT, GOT ENG 2 COMPRESSOR VANE ECAM. CLEARED ON ITS OWN THEN CAME BACK ABOUT 30 SECS LATER. SHORTLY AFTERWHILE DESCEN
- [SDR AALA202401180715](https://openairdocs.org/sdr/AALA202401180715), Jan 17, 2024: ENGINE. STALLED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED COMMING INTO ORD. IN LEVEL CRUISE AT FL 370 ENGINE 1 AND ENGINE 2 STALL. OAT -64C, CLEAN AIR. FLIGHT CREW FOLLO
- [SDR AALA202106299013](https://openairdocs.org/sdr/AALA202106299013), Jun 27, 2021: ENGINE. STALLED. AIRCRAFT WAS GROUNDED: ENGINE #2 HAD TWO COMPRESSOR STALLS. VACATING FL 360 TO DESCEND TO FL 350, SMOOTH AIR, AUTO THRUST ON , ECAM ENGINE 2 STALL, SELF RECOVER
- [SDR AALA202102239012](https://openairdocs.org/sdr/AALA202102239012), Feb 19, 2021: FUEL FILTER. CLOGGED. AIRCRAFT WAS GROUNDED: ENGINE 2 FUEL FILTER CLOG ECAM MESSAGE. REPLACED NR 2 ENGINE FUEL FILTER ELEMENT PER AMM 73-11-10-400-004-A (AALA202102239012) AND THE NR
- [SDR AALA202102239013](https://openairdocs.org/sdr/AALA202102239013), Feb 19, 2021: PRESSURE SWITCH. FAULTED. AIRCRAFT WAS GROUNDED: ENGINE 2 FUEL FILTER CLOG ECAM MESSAGE. REPLACED NR 2 ENGINE FUEL FILTER ELEMENT PER AMM 73-11-10-400-004-A (AALA202102239012) AND THE NR
- [SDR AALA202012249009](https://openairdocs.org/sdr/AALA202012249009), Dec 23, 2020: VALVE. LEAKING. AIRCRAFT WAS GROUNDED. ON TAKEOFF TOWER AND ANOTHER AIRCRAFT REPORTED LEFT ENGINE LEAKING FUEL (NO LEAK INDICATED IN THE AIR). AN EMERGENCY WAS DECLARED AND RET
- [SDR AALA202011169003](https://openairdocs.org/sdr/AALA202011169003), Nov 15, 2020: WARNING MESSAGE. FALSE ACTIVATION. AIRCRAFT WAS GROUNDED. REJECTED TAKEOFF AT APPROXIMATELY 40 KNOTS, ENGINE NR 1 THRUST REVERSER LOCK ELECTRONIC CENTRALIZED AIRCRAFT MONITOR FAULT. ACCOMPLISHED 
- [SDR AALA202010209016](https://openairdocs.org/sdr/AALA202010209016), Oct 18, 2020: CHECK VALVE. OUT OF TOLERANCE. AIRCRAFT WAS GROUNDED. AT CRUISE, FL 280, WITH REDUCTION OF POWER, RECEIVED MULTIPLE (2) COMPRESSOR/ENGINE STALLS WITH SELF RECOVERY. MOMENTARY ECAM (LEFT ENGIN
- [SDR AALA202003169004](https://openairdocs.org/sdr/AALA202003169004), Mar 11, 2020: FUEL. CLOGGED. AIRCRAFT GROUNDED - ENG NO.2 FUEL FILTER CLOG, MSG ON FINAL APPROACH. REMOVED AND REPLACED NO. 2 ENGINE FUEL PUMP PER AMM 73-11-10 AND MCM 73-94-11, OPERATIONAL
- [SDR AALA2020022099016](https://openairdocs.org/sdr/AALA2020022099016), Feb 18, 2020: SENSOR. FAULTY. AIRCRAFT WAS GROUNDED: ON ENGINE RUNUP FOR TAKEOFF WITH BOTH ENGINES AT 50% N1, THRUST LEVERS PLACED IN TOGA LEFT ENGINE EXTREMELY SLOW TO RUNUP. ASSYMETRIC THR
- [SDR AALA202002109043](https://openairdocs.org/sdr/AALA202002109043), Feb 6, 2020: WARNING MESSAGE. FALSE ACTIVATION. AIRCRAFT NOT GROUNDED: COMPRESSOR STALL / ENG 1 STALL MSG DURING REV THRUST OK AFTER POWER REDUCTION. ACCOMPLISHED TSM 73-00-00-810-865-A ENG 1 STALL. AFTER THA
- [SDR ASAA2020010231741](https://openairdocs.org/sdr/ASAA2020010231741), Dec 29, 2019: ENGINE. FAILED. PRIOR TO TOP OF DESCENT, N1 ROLL BACK AND ENG 2 STALL ECAM. ENGINE RECOVERED TO CRUISE POWER BUT N@ VIBE INCREASED TO ABOUT 4.5 AS WE WERE IN QRH FOR ENG 2 STAL
- [SDR AALA201910189013](https://openairdocs.org/sdr/AALA201910189013), Oct 17, 2019: BLADE. DAMAGED. AIRCRAFT WAS GROUNDED: PILOT REPORTS AT CRUISE ECAM ENG 1 E10 FAULT ANNUNCIATED WITH ENGINE 1 FIRE LIGHT FLASHING, FAULT LIGHT ASSOCIATED AUTOTHURST ECAM MESSAG
- [SDR CA190809013](https://openairdocs.org/sdr/CA190809013), Aug 8, 2019: O-RING. LEAKING. (CAN) HYDRAULIC LEAK SUSPECTED BY CREW INFLIGHT. LEAK CONFIRMED AFTER ARRIVAL. RESOLUTION O RING ON PTU MFLD. (YELLOW) HYD. RETURN LINE FOUND LEAKING. O RING RE
- [SDR AALA201901059002](https://openairdocs.org/sdr/AALA201901059002), Jan 4, 2019: ENGINE. MALFUNCTIONED. AIRCRAFT WAS GROUNDED: CLIMBING THROUGH 30,000, 2 BANGS HEARD AND ECAM MESSAGE DISPLAYED COMPRESSOR STALL NR 2 ENGINE. EMERGENCY DECLARED AND FLIGHT LANDED WITH
- [SDR ASAA2018052024715](https://openairdocs.org/sdr/ASAA2018052024715), May 20, 2018: APU. OVERSERVICED. STRONG ODOR RETURNED ON DESCENT. SMELLED LIKE OIL DROPPING ON SOMETHING HOT. MOST NOTICEABLE IN CENTER CABIN. ACFT GROUNDED. TROUBLESHOT AND FOUND A APU BLEED F
- [SDR CA180423013](https://openairdocs.org/sdr/CA180423013), Apr 22, 2018: SOFTWARE. FAILED. (CAN) WHILE POSITIONING INTO TAKE-OFF POSITION NR 2 ENGINE FLAMED OUT. FLIGHT RETURNED TO GATE FOR INVESTIGATION. RESOLUTION, AS PER AMM 72-00-00-200-026A NR 2 
- [SDR CA180314007](https://openairdocs.org/sdr/CA180314007), Mar 12, 2018: FAN. FAILED. (CAN) SMOKE IN COCKPIT. FLIGHT DIVERTED. RESOLUTION EXTRACT FAN 18HQ REPLACED, IAW AMM 21-26-51 PB401. OPERATIONAL TEST, AS PER AMM 21-26-00-710-001-A. (TC# 201
- [SDR AALA201802089026](https://openairdocs.org/sdr/AALA201802089026), Feb 7, 2018: ENGINE. MALFUNCTIONED. REJECTED TAKE OFF FOR ASYMETRIC THRUST. LEFT ENGINE SPOOLED UP. RIGHT ENGINE LAGGED, MINOR SKID RESULTED. INSPECTED THE LEFT AND RIGHT MLG WHEEL AND BRAKES IAW 
- [SDR AALA201712159044](https://openairdocs.org/sdr/AALA201712159044), Dec 14, 2017: FUEL FILTER. CLOGGED. AIRCRAFT WAS GROUNDED. FLIGHT RETURNED TO MIA ON ACCOUNT OF A #2 ENGINE FUEL FILTER CLOG MESSAGE ON ECAM. EMERGENCY WAS DECLARED AND FLIGHT LANDED SAFELY WITHOU
- [SDR AALA20171214013](https://openairdocs.org/sdr/AALA20171214013), Dec 14, 2017: FILTER. CLOGGED. AIRCRAFT WAS GROUNDED. DURING CRUISE, ECAM MESSAGE FOR THE NR 2 ENGINE FUEL FILTER CLOG MESSAGE ILLUMINATED. AIR RETURN BACK TO DEPARTURE. MAINTENANCE REPLACED 
- [SDR AALA201707119003](https://openairdocs.org/sdr/AALA201707119003), Jul 6, 2017: ENGINE. MALFUNCTIONED. ABRUPT YAW ON TAKEOFF PRIOR TO 80 KNOTS. SYMMETRIC ENGINE INDICATIONS. REJECTED TAKEOFF AND RETURNED TO GATE. ACCOMPLISHED FURTHER RESEARCH AND FOUND NO ADDITIO
- [SDR AALA20161211003](https://openairdocs.org/sdr/AALA20161211003), Dec 11, 2016: FADEC. MALFUNCTIONED. AIRCRAFT WAS GROUNDED. DEN, AIR INTERRUPT, DFW-EGE. EMERGENCY DECLARED. LANDING UNEVENTFUL. DURING CRUISE ECAM ALERTED "ENG NR 1 FUEL CTL FAULT". MAINTENANCE AC
- [SDR VQIA2017081000044](https://openairdocs.org/sdr/VQIA2017081000044), Sep 23, 2016: HMU. FAILED. NR 1 ENGINE N1 VERY SLOW TO RESPOND, 70% SPLIT IN FLIGHT AT 3000 FT. IN FLIGHT LEFT N1 DROPPED FROM 70% TO IDLE, RIGHT N1 REMAINED AT 70%. R & R NR 1 ENGINE HMU
- [SDR VQI2016F00030](https://openairdocs.org/sdr/VQI2016F00030), Aug 3, 2016: WIRE. CHAFED. DURING PREFLIGHT, HAD THE FOLLOWING WRITEUP: ENGINE 1 FIRE BOTTLE SQUIB, NR 1 NOT TESTING. R & R ENGINE 1 BOTTLE 1 SQUIB IAW AMM 26-21-41. OPS CHECK NO GOOD. IT
- [SDR AALA201604099010](https://openairdocs.org/sdr/AALA201604099010), Apr 8, 2016: CONTROL UNIT. DEFECTIVE. AIRCRAFT WAS GNDED. ENG 1 THRUST LEVER DISAGREEMENT. ENG 1 STUCK AT IDLE THRUST. REPLACED NR 1 ENG THROTTLE CONTROL UNIT IAW AMM 76-11-19-400-042-A.
- [SDR AALA201603219006](https://openairdocs.org/sdr/AALA201603219006), Mar 20, 2016: STARTER. DEFECTIVE. AIRCRAFT WAS NOT GNDED. APU AUTO SHUTDOWN IN FLIGHT, FOLLOWED BY SMELL IN THE CABIN. REPLACED APU STARTER IAW AMM 49-42-51-400-0065-A. ACCOMPLISHED A SATISFACTO
- [SDR CA160321002](https://openairdocs.org/sdr/CA160321002), Mar 20, 2016: WARNING MESSAGE. FALSE ACTIVATION. (CAN) GPWS WARNING 15NM NW YDF VOR AT 3800 FT/250 KTS. TERRAIN, TERRAIN, THEN 10 SECONDS LATER TERRAIN,TERRAIN, PULL-UP. ASR TO FOLLOW. RESOLUTION FOCA CARD RET
- [SDR AALA201603159016](https://openairdocs.org/sdr/AALA201603159016), Mar 11, 2016: ENGINE. ODOR. AIRCRAFT WAS GNDED. INBD FLIGHT ATTENDANT REPORTED NOXIOUS CHEMICAL ODOR THROUGHOUT CABIN ON LANDING. REPLACED NR 2 ENG IAW JC 26L40071001.
- [SDR CA160128003](https://openairdocs.org/sdr/CA160128003), Jan 27, 2016: SAFETY VALVE. FAILED. (CAN) APPROXIMATELY 1HR INTO FLIGHT CREW REPORTED CABIN PRESSURE VALVE NOT CLOSING. CABIN PRESSURE ABOVE NORMAL. CREW PATCHED TO MOC VIA DISPATCH AND DECISION M
- [SDR AALA201512299001](https://openairdocs.org/sdr/AALA201512299001), Dec 28, 2015: ENGINE. FAILED. AIRCRAFT WAS GNDED. ENG NR 1 STALL ECAM 2 TIMES. NO FLUCTUATIONS N1, N2, EGT NORMAL. FLIGHT LEVEL 370 WITH THRUST REDUCTION. NR 1 ENG FAILED BORESCOPE & WAS REP
- [SDR CA151224004](https://openairdocs.org/sdr/CA151224004), Dec 24, 2015: IDG. FAILED. (CAN) CREW RECEIVED AN IDG LOW OIL PRESSURE MESSAGE. MOC WAS CONSULTED AND RECOMMENDED CONTINUING TO DESTINATION WHERE THE GENERATOR COULD BE LOOKED AT FOR A PO
- [SDR CA151208004](https://openairdocs.org/sdr/CA151208004), Dec 4, 2015: HOSE. LEAKING. (CAN) APPROXIMATELY 1 HR AFTER DEPARTURE THE CREW REPORTED A GREEN HYDRAULIC SYSTEM LOW PRESSURE INDICATION AND RETURNED TO AIRPORT. NO EMERGENCY WAS DECLARED A
- [SDR CA151202003](https://openairdocs.org/sdr/CA151202003), Dec 1, 2015: HOSE. LEAKING. (CAN) CREW REPORTED LOSING ALL YELLOW HYD SYS FLUID ABOUT 1 HR OUT OF FLL. AN EMERGENCY WAS NOT DECLARED AND A NORMAL LANDING WAS CARRIED OUT. MAINTENANCE CONTR
- [SDR CA151204010](https://openairdocs.org/sdr/CA151204010), Nov 28, 2015: SPOOL. FAILED. (CAN) ON SEPTEMBER 25, 2015 A CFM56 ENGINE WAS REMOVED FROM SERVICE DUE TO HPT DISK CYCLE LIMIT. AFTER INDUCTION INTO THE ENGINE SHOP THE ENGINE WAS DISASSEMBLE
- [SDR CA151026004](https://openairdocs.org/sdr/CA151026004), Oct 25, 2015: FILTER. DIRTY. (CAN) THE CAPTAIN REPORTED A FUMED EVENT THAT WAS APPARENTLY NOTICEABLE BY THE PASSENGERS AND CABIN CREW. THE EVENT OCCURRED IN THE LATTER STAGES OF THE FINAL A
- [SDR CA151013005](https://openairdocs.org/sdr/CA151013005), Oct 12, 2015: HYDRAULIC LINE. LEAKING. (CAN) GREEN HYDRAULIC SYS FAILURE ENROUTE. DIVERTED FOR MAINTENANCE. RESOLUTION FOUND LT ENGINE T/R ISOLATION VALVE HYD LINE LEAKING IN THE PYLON REPLACED HYD L
- [SDR CA150922001](https://openairdocs.org/sdr/CA150922001), Sep 21, 2015: FAN. FAILED. (CAN) ON THE CLIMB OUT AT FL330, AN ELECTRICAL ODOR BEGAN EMANATING IN THE CABIN FOLLOWED BY AN ECAM MESSAGE IN THE FLIGHT DECK, VENT EXTRACT FAULT. THE CREW DE
- [SDR CA150915003](https://openairdocs.org/sdr/CA150915003), Sep 13, 2015: COMPUTER. MALFUNCTIONED. (CAN) ELECTRIC DC ESS BUS FAULT ON ECAM IN FLT. RESOLUTION: FOUND C/B "F05" FIN "12WV" " SDAC 1&2 28VDC ESS. BUS" AT 49VU TRIPPED. T/S C/O WITH REF. TO WD 31-54
- [SDR CA150825012](https://openairdocs.org/sdr/CA150825012), Aug 24, 2015: CONTROLLER. FAILED. (CAN) PRESSURIZATION ISSUES, DIVERTING TO LAND, DESCENDED TO F100. NO FURTHER INFORMATION AT THIS TIME. RESOLUTION R & R CPC NR 2 IAW AMM 21-31-34-000-001. REPL
- [SDR CA150623001](https://openairdocs.org/sdr/CA150623001), Jun 22, 2015: VALVE. FAILED. (CAN) APPROX 45 MINUTES AFTER DEPARTURE THE CREW REPORTED A FUEL FLOW PROBLEM & NR 2 ENG STALL. FLIGHT RETURNED TO DEPARTURE AIRPORT & LANDED AT MAXIMUM LANDING
- [SDR CA150605006](https://openairdocs.org/sdr/CA150605006), Jun 5, 2015: STARTER. FAILED. (CAN) AFTER PUSH, DURING START UP, SMOKE EMANATED FROM THE NR 2 ENGINE. THE START WAS ABORTED AND THE ACFT RETURNED TO THE GATE. MAINTENANCE CONTROL ADVISED. RE
- [SDR CA150504002](https://openairdocs.org/sdr/CA150504002), May 3, 2015: HOSE. LEAKING. (CAN) DURING THE BOARDING PROCESS, A LEAK OCCURRED IN THE NR 2 ENGINE AREA RESULTING IN A PUDDLE 10X10 FEET. ERS RESPONDED FOR THE CLEAN UP. PASSENGERS WERE DEP
- [SDR SOKF20141125001](https://openairdocs.org/sdr/SOKF20141125001), Nov 24, 2014: ENGINE. BIRD INGESTION. DURING CLIMB FORM SJO TO SAL THE ENGINE NR 1 DAMAGED DUE BIRD STRIKE. ENGINE NR 1 WAS REMOVED AND REPLACED IAW AMM 71-00-00 AND OPERATIONAL AND LEAK TESTED IAW 
- [SDR CA141020006](https://openairdocs.org/sdr/CA141020006), Oct 20, 2014: COOLING FAN. WORN. (CAN) ON START UP A GRINDING SOUND FOLLOWED BY AN ODOR OCCURRED. SHORTLY AFTER STARTUP, SMELL DISSIPATED AND THE FLIGHT DEPARTED. APPROXIMATELY 1 HOUR INTO THE 

All 280: https://openairdocs.org/engine/cfm-international-cfm56-5b6-series/reports.md

## PMA parts (OpenAirDocs) (over 1,000, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

- [2564M19G01SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183308050320261019152741.0001): Seal - Stg 2 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M19G01 · Oct 15, 2026
- [2564M19G01SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID183308050320261019152741.0001): Seal - Stg 2 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M19G01 · Oct 15, 2026
- [2564M15G02SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182481008320261019152741.0001): Seal - Retainer Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M15G02 · Oct 15, 2026
- [2564M15G02SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID182481008320261019152741.0001): Seal - Retainer Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M15G02 · Oct 15, 2026
- [2564M19G02SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID171586083020261019152741.0001): Seal - Stg 2 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M19G02 · Oct 15, 2026
- [2564M19G02SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID171586083020261019152741.0001): Seal - Stg 2 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M19G02 · Oct 15, 2026
- [2564M15G01SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID139341463420261019152740.0001): Seal - Stg 3 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M15G01 · Oct 15, 2026
- [2564M15G01SD](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID139341463420261019152740.0001): Seal - Stg 3 Cprsr Sttr. Seal Dynamics Inc. A HEICO Aerospace Company · PMA PQ1715CE · Replaces 2564M15G01 · Oct 15, 2026
- [KT9974M10P207](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156771068620261019153205.0001): Ring, Piston. Turbine Kinetics Inc., A HEICO Aerospace Company · PMA PQ0816NE · Replaces 9974M10P207 · Oct 7, 2026
- [KT9974M10P207](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID156771068620261019153205.0001): Ring, Piston. Turbine Kinetics Inc., A HEICO Aerospace Company · PMA PQ0816NE · Replaces 9974M10P207 · Oct 7, 2026
- [337-141-601-0KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157822411420261008134816.0001): Bolt. Turbine Kinetics Inc., A HEICO Aerospace Company · PMA PQ0816NE · Replaces 337-141-601-0 · Sep 29, 2026
- [337-141-601-0KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157822411420261008134816.0001): Bolt. Turbine Kinetics Inc., A HEICO Aerospace Company · PMA PQ0816NE · Replaces 337-141-601-0 · Sep 29, 2026
- [649-788-399-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103937182820260909145920.0001): Packing-Preformed O-Ring. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 649-788-399-0 · Aug 24, 2026
- [649-788-399-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID103937182820260909145920.0001): Packing-Preformed O-Ring. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 649-788-399-0 · Aug 24, 2026
- [2002M87P02JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199317637820260806140031.0001): Gasket - Igniter Adapter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2002M87P02 · Jul 30, 2026
- [2002M87P02JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199317637820260806140031.0001): Gasket - Igniter Adapter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2002M87P02 · Jul 30, 2026
- [2002M87P01JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133871277820260806140030.0001): Gasket - Igniter Adapter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2002M87P01 · Jul 30, 2026
- [2002M87P01JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133871277820260806140030.0001): Gasket - Igniter Adapter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2002M87P01 · Jul 30, 2026
- [3051-1051KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121122166320260805155543.0001): Seal, Trapezoidal. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces 3051-1051 · Jul 21, 2026
- [3051-1051KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121122166320260805155543.0001): Seal, Trapezoidal. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces 3051-1051 · Jul 21, 2026
- [3177421JP-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144029116620260805181453.0001): Setscrew. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 3177421-1 · Jul 16, 2026
- [3177421JP-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144029116620260805181453.0001): Setscrew. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 3177421-1 · Jul 16, 2026
- [301-547-905-0JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163539788920260806140647.0001): Nut. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 301-547-905-0 · Jul 14, 2026
- [301-547-905-0JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163539788920260806140647.0001): Nut. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 301-547-905-0 · Jul 14, 2026
- [337-079-905-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162121163220260706131723.0001): Plug. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 337-079-905-0 · Jun 25, 2026
- [337-079-905-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162121163220260706131723.0001): Plug. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 337-079-905-0 · Jun 25, 2026
- [301-808-602-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141457374720260706131723.0001): Cover-Filter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 301-808-602-0 · Jun 25, 2026
- [301-808-602-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141457374720260706131723.0001): Cover-Filter. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 301-808-602-0 · Jun 25, 2026
- [1211342-240-014JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101824618120260706131723.0001): Packing. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 1211342-240-014 · Jun 25, 2026
- [1211342-240-014JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101824618120260706131723.0001): Packing. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 1211342-240-014 · Jun 25, 2026
- [3236051-1HA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186586940920260909154537.0001): BOOT, FLEXIBLE. Hutchinson Aerospace & Industry Inc. · PMA PQ0524NM · Replaces 3236051-1 · Jun 24, 2026
- [3236051-1HA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID186586940920260909154537.0001): BOOT, FLEXIBLE. Hutchinson Aerospace & Industry Inc. · PMA PQ0524NM · Replaces 3236051-1 · Jun 24, 2026
- [1476M79P05JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID107210147820260616140659.0001): Damper - Forward Sleeve. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 1476M79P05 · May 29, 2026
- [1476M79P05JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID107210147820260616140659.0001): Damper - Forward Sleeve. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 1476M79P05 · May 29, 2026
- [AAP-3504163-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180945408320260406133714.0001): Bearing. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3504163-1 · Apr 1, 2026
- [AAP-3504163-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID180945408320260406133714.0001): Bearing. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3504163-1 · Apr 1, 2026
- [336-031-701-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144123523920260324201242.0001): Weight-Balance 2.9G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-701-0 · Feb 25, 2026
- [336-031-701-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID144123523920260324201242.0001): Weight-Balance 2.9G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-701-0 · Feb 25, 2026
- [336-031-710-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129285223420260324201243.0001): Weight-Balance 6.5G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-710-0 · Feb 25, 2026
- [336-031-710-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID129285223420260324201243.0001): Weight-Balance 6.5G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-710-0 · Feb 25, 2026
- [336-031-708-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID112259513820260324201242.0001): Weight-Balance 5.7G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-708-0 · Feb 25, 2026
- [336-031-708-0JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID112259513820260324201242.0001): Weight-Balance 5.7G. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 336-031-708-0 · Feb 25, 2026
- [2949M03P01JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165472228620260225205426.0001): Blade Lock-Compressor Stg 8,9. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2949M03P01 · Feb 4, 2026
- [2949M03P01JA](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID165472228620260225205426.0001): Blade Lock-Compressor Stg 8,9. Jet Avion Corporation A HEICO Aerospace Company · PMA PQ1015CE · Replaces 2949M03P01 · Feb 4, 2026
- [E140375-3](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181608826420251229153151.0001): Flexible Shaft Assembly. BW Elliott Manufacturing Co LLC · PMA PQ2009NE · Replaces 121762-3 · Dec 17, 2025
- [E140375-3](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID181608826420251229153151.0001): Flexible Shaft Assembly. BW Elliott Manufacturing Co LLC · PMA PQ2009NE · Replaces 121762-3 · Dec 17, 2025
- [E140375-4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149149609920251229153152.0001): Flexible Shaft Assembly. BW Elliott Manufacturing Co LLC · PMA PQ2009NE · Replaces 121762-4 · Dec 17, 2025
- [E140375-4](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149149609920251229153152.0001): Flexible Shaft Assembly. BW Elliott Manufacturing Co LLC · PMA PQ2009NE · Replaces 121762-4 · Dec 17, 2025
- [AAP-3502129-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199148521820251125143636.0001): Bearing. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3502129-1 · Nov 6, 2025
- [AAP-3502129-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199148521820251125143636.0001): Bearing. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3502129-1 · Nov 6, 2025

All of them: https://openairdocs.org/engine/cfm-international-cfm56-5b6-series/pma.md

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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.