# CFM International CFM56-7B20 series - Type: Engine model (FAA registry) - Registry code: 13042 - Manufacturer (registry): CFM INTL - Model: CFM56-7B20 - Engine type: Turbo-fan - Power: 20,600 lb thrust - Installed in: 2 registered aircraft - Page: https://openairdocs.org/engine/cfm-international-cfm56-7b20-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 2022-02-03](https://openairdocs.org/ad/2022-02-03): Turbine Engine Accessory Drive · CFM International CFM56-3, CFM56-3B, CFM56-3C and 34 more. Effective Mar 22, 2022 - [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 2018-26-01](https://openairdocs.org/ad/2018-26-01): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jan 10, 2019 - [AD 2018-09-51](https://openairdocs.org/ad/2018-09-51): Engine · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 7, 2018 - [AD 2015-18-04](https://openairdocs.org/ad/2015-18-04): 73-tooth gearshaft located in the engine accessory gearbox (AGB) · CFM International CFM56-3, CFM56-7B20, CFM56-7B20/2 and 47 more. Effective Oct 20, 2015 - [AD 2015-04-02](https://openairdocs.org/ad/2015-04-02): Dual engine thrust instability event · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Mar 31, 2015 - [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 2010-01-05](https://openairdocs.org/ad/2010-01-05): LP turbine rear frames · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 25 more. Effective Feb 18, 2010 - [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 2008-03-09](https://openairdocs.org/ad/2008-03-09): Low pressure turbine rear frames (TRFs) · CFM International CFM56-7B18, CFM56-7B20, CFM56-7B22 and 10 more. Effective Mar 10, 2008 - [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 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 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 2001-02-12](https://openairdocs.org/ad/2001-02-12): On-Wing Torque Inspection · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 11 more. Effective Feb 14, 2001 - [AD 98-21-23](https://openairdocs.org/ad/98-21-23): Electronic Engine Control · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Nov 2, 1998 - [AD 98-19-20](https://openairdocs.org/ad/98-19-20): Hydromechanical Unit · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 7 more. Effective Oct 7, 1998 - [AD 98-14-51](https://openairdocs.org/ad/98-14-51): Accessory Gearbox · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B22 and 10 more. Effective Oct 1, 1998 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 2018-18-01](https://openairdocs.org/ad/2018-18-01) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Oct 16, 2018 - [AD 2018-10-11](https://openairdocs.org/ad/2018-10-11) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective Jun 1, 2018 - [AD 2018-09-10](https://openairdocs.org/ad/2018-09-10) (historical): Turbine Engine Compressor Section · CFM International CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3 and 46 more. Effective May 14, 2018 - [AD 2013-26-01](https://openairdocs.org/ad/2013-26-01) (historical): Oil dynamic seal assembly · CFM International CFM56-3, CFM56-3B, CFM56-3C and 52 more. Effective Feb 3, 2014 - [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) (4) - [SAIB NE-08-17R3](https://openairdocs.org/saib/NE-08-17R3): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued May 28, 2014 - [SAIB NE-08-17R2](https://openairdocs.org/saib/NE-08-17R2) (historical): Turbine Section - Propulsion Technology LLC Unapproved Repair. Issued Mar 7, 2011 - [SAIB NE-08-17R1](https://openairdocs.org/saib/NE-08-17R1) (historical): Propulsion Technology LLC Unapproved Repair. Issued May 22, 2008 - [SAIB NE-08-17](https://openairdocs.org/saib/NE-08-17) (historical): Propulsion Technologies International Unapproved Repair. Issued May 14, 2008 ## Registered aircraft (2) - [N737KA](https://openairdocs.org/aircraft/N737KA): [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 2001, S/N 30740 - [N7737E](https://openairdocs.org/aircraft/N7737E): [Southwest Airlines Co](https://openairdocs.org/faa-owner/SOUTHWEST%20AIRLINES%20CO), [Dallas, TX](https://openairdocs.org/faa-place/TX/Dallas), built 2006, S/N 33929 ## NTSB investigations None matched to aircraft with this engine model. ## FAA accident and incident reports (3) 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 20181019020379I](https://openairdocs.org/incident/20181019020379I), Oct 19, 2018: Boeing 737-7BD (N7737E), Chicago, IL, Minor damage. Review of the security footage indicated that the tug driver started turning the aircraft to the left too soon after pushback. This caused the aircraft to be… - [Incident 20130418006529I](https://openairdocs.org/incident/20130418006529I), Apr 18, 2013: Boeing 737-73V (N710SY), Lansing, MI, Minor damage. On April 18, 2013 scna flight 266 enroute from dca to lan encountered moderate continuous turbulence while on approach to rwy 28L. Winds were reported by the… - [Incident 20120328029199I](https://openairdocs.org/incident/20120328029199I), Mar 28, 2012: Boeing 737-73V (N711SY), Arlington, VA, Minor damage. On March 28, 2012, at 1011 EDT, sun country airlines flight scx 265, a Boeing 737-700 N711SY, was involved in an incident at ronald reagan Washington national… ## Service difficulty reports (188, newest 50) As reported by operators and repair stations, by the model named in the report. - [SDR 2026FA0000777](https://openairdocs.org/sdr/2026FA0000777), Sep 19, 2026: BELLCRANK. CRACKED. RETURN TO BLOCKS DUE TO ENGINE CONTROL WARNING, NR 2 ENGINE FRM 730 010 52. REPLACED BELLCRANK ASSY AT LT VSV ACTUATOR IN ENGINE 2 IAW AMM 73-31-01-800-005-F00 - [SDR AALA202609044092](https://openairdocs.org/sdr/AALA202609044092), Sep 2, 2026: PACKING. WORN. AIRCRAFT WAS GROUNDED: WHILE PERFORMING TROUBLESHOOTING WORK CARD 08L00021001(SMOKE ODOR FUMES INITIAL) FOUND #2 ENGINE OIL LEAK BETWEEN FAN SPINNER AND BOOSTER - [SDR 2026FA0000679](https://openairdocs.org/sdr/2026FA0000679), Aug 31, 2026: ENGINE. DAMAGED. SEVERE DAMAGE NR 1 ENGINE, DURING CLIMB. FLIGHT 739 GRU/VVI. QRF TO DEPARTURE AIRPORT. TURBINE DAMAGES UNDER EVALUATION - [SDR AALA202603240681](https://openairdocs.org/sdr/AALA202603240681), Mar 23, 2026: ENGINE. POWER LOSS. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LEVELING OFF AT FL310 NR 1 ENGINE N1 DIPPED AND SURGED AT LEAST 3 TIMES. THIS WAS ACCOMPANIED BY A BANG - [SDR AALA202603270681](https://openairdocs.org/sdr/AALA202603270681), Mar 23, 2026: ENGINE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: LEVELING OFF AT FL310 NUMBER 1 ENGINE N1 DIPPED AND SURGED AT LEAST 3 TIMES. THIS WAS ACCOMPANIED BY A - [SDR AALA202603202254](https://openairdocs.org/sdr/AALA202603202254), Mar 19, 2026: ENGINE. VIBRATION. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMBOUT NUMBER 1 ENGINE VIBRATIONS FLUCTUATED WILDLY OSCILLATING BETWEEN 2.0 AND 3.5, ENGIN - [SDR AALA202603252254](https://openairdocs.org/sdr/AALA202603252254), Mar 19, 2026: ENGINE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: DURING CLIMBOUT NUMBER 1 ENGINE VIBRATIONS FLUCTUATED WILDLY OSCILLATING BETWEEN 2.0 AND 3.5, ENGIN - [SDR AALA202603060469](https://openairdocs.org/sdr/AALA202603060469), Mar 5, 2026: COMPRESSOR. STALLED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT APPROXIMATELY FL 310 IN CLIMB, ENGINE NR 2 FAILED AFTER SEVERE VIBRATIONS AND COMPRESSORS STALL. AIR - [SDR AALA202603060177](https://openairdocs.org/sdr/AALA202603060177), Mar 5, 2026: ENGINE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT APPROXIMATELY FL 310 IN CLIMB, ENGINE NR 2 FAILED AFTER SEVERE VIBRATIONS AND COMPRESSORS STALL. AIR - [SDR AALA202603100469](https://openairdocs.org/sdr/AALA202603100469), Mar 5, 2026: HMU. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT APPROXIMATELY FL 310 IN CLIMB, ENGINE NUMBER 2 FAILED AFTER SEVERE VIBRATIONS AND COMPRESSORS STALL. - [SDR AALA202603041151](https://openairdocs.org/sdr/AALA202603041151), Feb 28, 2026: ENGINE. OVERTEMP. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NR 2 ENGINE FAILURE AT APPROXIMATELY 28,000 FEET, EGT RED LINE WITH TEMP 987 AND ENGINE FAILURE ANNUNCI - [SDR AALA202603042392](https://openairdocs.org/sdr/AALA202603042392), Feb 21, 2026: OIL SYSTEM. LEAKING. AIRCRAFT WAS GROUNDED: THE FLIGHT ATTENDANTS REPORTED ODOR IN THE AFT CABIN DURING TAKEOFF AND LASTED ABOUT 5 MINUTES. ODOR DESCRIBED TO SMELL LIKE DIRTY SOCKS. - [SDR AALA202601122535](https://openairdocs.org/sdr/AALA202601122535), Jan 9, 2026: DUCT. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ON CLIMB OUT THE ENGINE ANTI-ICE COWL VALVE LIGHT ILLUMINATED AND REMAINED BRIGHT BLUE AND THE AMBER LI - [SDR AALA202512293268](https://openairdocs.org/sdr/AALA202512293268), Dec 23, 2025: OIL SYSTEM. LEAKING. AIRCRAFT WAS GROUNDED: STRONG ODOR REPORTED BY NR 2 FLIGHT ATTENDANT DESCENDING THROUGH 8,000 FEET. NO ODOR IN THE FLIGHT DECK. ALL FLIGHT ATTENDANTS MENTIONED - [SDR AALA202512196384](https://openairdocs.org/sdr/AALA202512196384), Dec 18, 2025: WARNING MESSAGE. ILLUMINATED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CRUISE NEAR TOP OF DECENT AT FL210, #1 ENGINE OIL QUANTITY INDICATED 0, SHUTDOWN NUMBER 1 ENGINE - [SDR AALA202510301497](https://openairdocs.org/sdr/AALA202510301497), Oct 28, 2025: ENGINE. CONTAMINATED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ODOR THROUGHOUT THE WHOLE CABIN. AIRCRAFT AIR INTERRUPTED BACK TO AND LANDED SAFELY AT MIA. ACCOMPLISHE - [SDR AALA202510304348](https://openairdocs.org/sdr/AALA202510304348), Oct 26, 2025: ENGINE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 2 ENGINE SHUT DOWN IN FLIGHT DUE TO LOSS OF OIL QUANTITY THEN LOSS OF OIL PRESSURE. AIRCRAFT EME - [SDR AALA202509304096](https://openairdocs.org/sdr/AALA202509304096), Sep 29, 2025: ENGINE. VIBRATION. AIRCRAFT WAS GROUNDED: AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: UPON THROTTLE REDUCTION AT TOP OF DESCENT, ENGINE NUMBER 2 DEVELOPED STRONG VIBR - [SDR AALA202510021275](https://openairdocs.org/sdr/AALA202510021275), Sep 28, 2025: PUMP. INOPERATIVE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF N1 HAD A 7 PERCENT SPLIT AND ENGINE SHUTDOWN ON ITSELF. AIRCRAFT AIR INTERRUPTED BACK TO - [SDR AALA202510027020](https://openairdocs.org/sdr/AALA202510027020), Sep 28, 2025: PACKING. DETERIORATED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AFTER TAKEOFF N1 HAD A 7 PERCENT SPLIT AND ENGINE SHUTDOWN ON ITSELF. AIRCRAFT AIR INTERRUPTED BACK TO - [SDR AALA202510076932](https://openairdocs.org/sdr/AALA202510076932), Sep 25, 2025: ENGINE. ODOR. AIRCRAFT WAS GROUNDED: DURING TAKEOFF OUT OF DCA THERE WAS A VERY STRONG DIRTY, MUSTY, AND OILY SMELL THROUGH OUT THE ENTIRE AIRCRAFT. REMOVED AND REPLACED NUMB - [SDR SWAA2025091514598](https://openairdocs.org/sdr/SWAA2025091514598), Sep 11, 2025: FUEL FILTER. BYPASSING. NUMBER 2 ENGING FUEL FILTER BYPASS LIGHT ILLUMINATED, FILTER R & R AT DEFERRAL. ITEM OK TO CONTINUE PER MEL 73-4-01 SP1. REMOVED AND REPLACED FUEL FILTER IAW MM - [SDR CALA2025082708193](https://openairdocs.org/sdr/CALA2025082708193), Aug 26, 2025: TRANSDUCER. FAULTED. ELECTRONIC ENGINE CONTROL (EEC) RECENT FAULTS BITE TEST {B737-73-3-0068} - FOUND LONG TIME MAINTENANCE MESSAGE 78-11491 THE RT REVERSER SLEEVE IS OUT OF RANGE O - [SDR AALA202508222533](https://openairdocs.org/sdr/AALA202508222533), Aug 21, 2025: HMU. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT 37K FEET OVER CUBA, NUMBER 1 ENGINE ROLLED BACK TO 40-50% N1. AUTO THROTTLES DISENGAGED. AIRCRAFT AI - [SDR AALA202507176580](https://openairdocs.org/sdr/AALA202507176580), Jul 14, 2025: OIL SYSTEM. LEAKING. AIRCRAFT WAS GROUNDED: STRONG SMELL ON TAKEOFF ROLL, SIMILAR TO DIRTY SOCKS. NOTICABLE AT 40% N1, BECAME WORSE AS WE INCREASED THRUST. EVIDENCE OF OIL WAS FOUND - [SDR AALA202507149372](https://openairdocs.org/sdr/AALA202507149372), Jul 10, 2025: ENGINE. FLAMED OUT. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FLAMEOUT OF ENGINE NUMBER 1 AFTER LEVELING OFF AT FL370. THERE WAS NO OTHER INDICATIONS THAN A "ROLL BA - [SDR AALA202507179372](https://openairdocs.org/sdr/AALA202507179372), Jul 10, 2025: ENGINE. FLAMED OUT. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FLAMEOUT OF ENGINE NUMBER 1 AFTER LEVELING OFF AT FL370. THERE WAS NO OTHER INDICATIONS THAN A "ROLL BA - [SDR AALA202506306224](https://openairdocs.org/sdr/AALA202506306224), Jun 28, 2025: OIL SYSTEM. LOW PRESSURE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: INFLIGHT ENGINE SHUTDOWN DUE TO LOW OIL PRESSURE ON NUMBER 1 ENGINE. AIRCRAFT DIVERTED TO AND LANDED SA - [SDR AALA202507086224](https://openairdocs.org/sdr/AALA202507086224), Jun 28, 2025: ENGINE. SHUTDOWN. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: INFLIGHT ENGINE SHUTDOWN DUE TO LOW OIL PRESSURE ON NUMBER 1 ENGINE. AIRCRAFT DIVERTED TO AND LANDED SA - [SDR AALA202506302410](https://openairdocs.org/sdr/AALA202506302410), Jun 27, 2025: ENGINE. OVERTEMP. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: EGT OVER TEMP ON THE NUMBER 2 ENGINE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT DFW. ACCOMPLISHED AMM 7 - [SDR AALA202506246217](https://openairdocs.org/sdr/AALA202506246217), Jun 22, 2025: ENGINE. POWER LOSS. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: SHORTLY AFTER TURNING OFF THE LEFT PACK FOR BLEED, THE TRIP NUMBER 1 ENGINE ROLLED BACK WITH ACCOMPANYI - [SDR AALA202506240445](https://openairdocs.org/sdr/AALA202506240445), Jun 22, 2025: REGULATOR. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: SHORTLY AFTER TURNING OFF THE LEFT PACK FOR BLEED, THE TRIP NUMBER 1 ENGINE ROLLED BACK WITH ACCOMPANYI - [SDR AALA202506250435](https://openairdocs.org/sdr/AALA202506250435), Jun 22, 2025: ENGINE. POWER LOSS. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ENGINE NUMBER 1 INCREASED TO RED LINE ON N1 WITH THRUST LEVERS BACK, WHILE DESCENDING, THRUST LEVER WEN - [SDR AALA202505296757](https://openairdocs.org/sdr/AALA202505296757), May 26, 2025: WIRE HARNESS. FAULTED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS NOT DECLARED DUE TO: LEFT DUCT PRESSURE WENT TO ZERO AFTER TAKEOFF, N1 SPLIT UP TO 4%, REPEAT WRITE UP. AIRCRAFT AIR INT - [SDR SWAA2025052172112](https://openairdocs.org/sdr/SWAA2025052172112), May 17, 2025: ENGINE. MAKING METAL. NR 2 ENGINE OIL FILTER BYPASS LIGHT. PERFORMED FIM TASK 79-05 TASK 817. FOUND NO DISAGREE MESSAGES & NO CLOGGED STATE. PERFORMED PARAG E STEP 3 (C), INSPECTED C - [SDR AALA202505011774](https://openairdocs.org/sdr/AALA202505011774), Apr 26, 2025: OIL SYSTEM. LOW. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: OIL QUANTITY AND PRESSURE DROPPED BELOW 5 QUARTS; SHUTDOWN NUMBNER 1 ENGINE AS A PRECAUTION. AIRCRAFT A - [SDR AALA202504168827](https://openairdocs.org/sdr/AALA202504168827), Apr 15, 2025: ENGINE. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: VIOLENT ENGINE FAILURE ON NUMBER 2 ENGINE DURING CLIMB THROUGH FL240. AIRCRAFT AIR INTERRUPTED BACK TO - [SDR DALA2025041703014](https://openairdocs.org/sdr/DALA2025041703014), Apr 15, 2025: CLAMP. LOOSE. SHIP 3892 -ATB- RETURNED TO TUS DUE TO LT ENG OVERHEAT INDICATION AFTER TAKEOFF. CORRECTIVE ACTION: MTC FOUND PRSOV LOWER CLAMP LOOSE. TOURQUED CLAMP, RAN ENGIN - [SDR AALA202504018424](https://openairdocs.org/sdr/AALA202504018424), Mar 22, 2025: SEAL. LEAKING. AIRCRAFT WAS GROUNDED: ON TAKE OFF ROLL, A STRONG MUSTY SMELL NOTICED IN FLIGHT DECK ONLY. REMOVE AND REPLACED STARTER (AALA202503242799) AND DRIVE PAD SEAL (AA - [SDR AALA202504012799](https://openairdocs.org/sdr/AALA202504012799), Mar 22, 2025: STARTER. LEAKING. AIRCRAFT WAS GROUNDED: ON TAKE OFF ROLL, A STRONG MUSTY SMELL NOTICED IN FLIGHT DECK ONLY. **SUPPLEMENTAL REPORT FOR (AALA202503242799): REMOVE AND REPLACED STA - [SDR AALA202503240627](https://openairdocs.org/sdr/AALA202503240627), Mar 21, 2025: COMPRESSOR. STALLED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND - [SDR AALA202504010627](https://openairdocs.org/sdr/AALA202504010627), Mar 21, 2025: HMU. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND - [SDR AALA202504011909](https://openairdocs.org/sdr/AALA202504011909), Mar 21, 2025: HEATER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND - [SDR AALA202504010096](https://openairdocs.org/sdr/AALA202504010096), Mar 21, 2025: HEATER. FAILED. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: NUMBER 1 ENGINE FAIL (COMPRESSOR STALL), ENGINE 1 SHUTDOWN BY CREW IN DESCENT; AIRCRAFT DIVERTED TO AND - [SDR SWAA2025032007748](https://openairdocs.org/sdr/SWAA2025032007748), Mar 18, 2025: MODULE. LOW PRESSURE. AFTER FLAPS 5 HYD A SYSTEM LOOW PRESSURE LIGHTS ON BOTH ENG AND ELECTRIC PUMP SHORTLY AFTER LOW PRESSURE LIGHTS ON HYD SYSTEM A CAME ON. SYS A QTY WENT TO 0. WE - [SDR SWAA2025032007747](https://openairdocs.org/sdr/SWAA2025032007747), Mar 18, 2025: FILTER. LOW PRESSURE. AFTER FLAPS 5 HYD A SYSTEM LOW PRESSURE LIGHTS ON BOTH ENG AND ELECTRIC PUMP SHORTLY AFTER LOW PRESSURE LIGHTS ON HYD SYSTEM A CAME ON. SYS A QTY WENT TO 0. WE - [SDR SWAA2025032007746](https://openairdocs.org/sdr/SWAA2025032007746), Mar 18, 2025: PUMP. LOW PRESSURE. AFTER FLAPS 5 HYD A SYSTEM LOOW PRESSURE LIGHTS ON BOTH ENG AND ELECTRIC PUMP SHORTLY AFTER LOW PRESSURE LIGHTS ON HYD SYSTEM A CAME ON. SYS A QTY WENT TO 0. WE - [SDR AALA202505290407](https://openairdocs.org/sdr/AALA202505290407), Mar 13, 2025: ENGINE. FIRE. AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: SHORTLY AFTER TAKEOFF, THE RIGHT EGT WAS OBSERVEDTO ILLUMINATE RED WITH A TEMP OF 930 AND AN ENGINE VIB - [SDR ASAA2025020955820](https://openairdocs.org/sdr/ASAA2025020955820), Feb 9, 2025: POWER SUPPLY. NO TEST. EMERGENCY LIGHT AT L1 AND L2 FAIL TEST ON T/C 78233001. GROUNDED - YES. REMOVED AND REPLACED POWER SUPPLY W/ BATTERY ASSYS M1673 AND M1675 REF AMM 33-51-06, WDM - [SDR SWAA2025020491670](https://openairdocs.org/sdr/SWAA2025020491670), Jan 31, 2025: ANGLE. CRACKED. RIGHT ENGINE; LPT COOLING TUBE SUPPORT ANGLE BRACKET CRACKED 4OCLOCK POSITION <[01]. REMOVED AND REPLACED CRACKED LPT COOLING TUBE SUPPORT ANGLE BRACKET AT 4 O? All 188: https://openairdocs.org/engine/cfm-international-cfm56-7b20-series/reports.md ## STCs that may be installed (OpenAirDocs) (2) Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has. - [STC SE04840NY](https://openairdocs.org/stc/SE04840NY): Installation of HarcoSemco Exhaust Gas Temperature (EGT) Electrical Harnesses in CFM56-7 engine. Kilroy Aviation LLC - [STC SE03036CH](https://openairdocs.org/stc/SE03036CH): Application of a deep compressive stress layer using a Low Plasticity Burnishing (LPB) process on CFM56-7 Series Engines Stage 1 High Pressure Compressor (HPC) Blade Dovetails in accordance with Delta Air Lines Inc. Drawing No. 72-0396, Revision B, dated November 3, 2011, or later FAA Approved revision. Delta Air Lines Inc ## 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 - [AAP-3179410-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161769751220261022213314.0001): SETSCREW. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3179410-1 · Oct 14, 2026 - [AAP-3179410-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID161769751220261022213314.0001): SETSCREW. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3179410-1 · Oct 14, 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 - [9057M50P01WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132297149820261008195557.0001): Seal. Wencor, LLC · PMA PQ1370NM · Replaces 9057M50P01 · Oct 1, 2026 - [9057M50P01WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID132297149820261008195557.0001): Seal. Wencor, LLC · PMA PQ1370NM · Replaces 9057M50P01 · Oct 1, 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 - [AAP-3181263-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134991105620260923165754.0001): SPRING. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3181263-1 · Aug 5, 2026 - [AAP-3181263-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134991105620260923165754.0001): SPRING. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3181263-1 · Aug 5, 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 - [J206P0051AKT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195149956720260806140944.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0051A · Jul 28, 2026 - [J206P0051AKT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195149956720260806140944.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0051A · Jul 28, 2026 - [J206P0131KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194943631120260806140945.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0131 · Jul 28, 2026 - [J206P0131KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID194943631120260806140945.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0131 · Jul 28, 2026 - [J206P0143KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192477703120260806140946.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0143 · Jul 28, 2026 - [J206P0143KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID192477703120260806140946.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0143 · Jul 28, 2026 - [J206P0137KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID105344866320260806140945.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0137 · Jul 28, 2026 - [J206P0137KT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID105344866320260806140945.0001): Ring Retaining, Internal-Medium Duty, A286. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J206P0137 · Jul 28, 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 - [AAP-3181264-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID110152260220260804212133.0001): LINK ASSEMBLY. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3181264-1 · Jun 29, 2026 - [AAP-3181264-1](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID110152260220260804212133.0001): LINK ASSEMBLY. Approved Air Parts, LLC · PMA PQ4173NE · Replaces Honeywell 3181264-1 · Jun 29, 2026 - [J952P27AKT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101972840720260716151439.0001): Screw, Machine-Flush Head. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J952P27A · Jun 29, 2026 - [J952P27AKT](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID101972840720260716151439.0001): Screw, Machine-Flush Head. Turbine Kinetics Inc, A HEICO Aerospace Company · PMA PQ0816NE · Replaces J952P27A · Jun 29, 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 - [9523M35G03JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191057781220260806140516.0001): Arm Assembly. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 9523M35G03 · Jun 8, 2026 - [9523M35G03JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191057781220260806140516.0001): Arm Assembly. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 9523M35G03 · Jun 8, 2026 - [1385M33G03JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141058667820260806140515.0001): Arm Assembly. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 1385M33G03 · Jun 8, 2026 - [1385M33G03JP](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID141058667820260806140515.0001): Arm Assembly. Jet Parts Engineering Inc · PMA PQ1739CE · Replaces 1385M33G03 · Jun 8, 2026 - [3504845-3WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176108130520260618160615.0001): Gear-Pinion. Wencor, LLC · PMA PQ1370NM · Replaces 3504845-3 · Jun 4, 2026 - [3504845-3WE](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176108130520260618160615.0001): Gear-Pinion. Wencor, LLC · PMA PQ1370NM · Replaces 3504845-3 · Jun 4, 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 All of them: https://openairdocs.org/engine/cfm-international-cfm56-7b20-series/pma.md --- 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.