# Pratt & Whitney PW4090

- Type: Engine model (FAA registry)
- Registry code: 51537
- Manufacturer (registry): P & W
- Model: PW4090
- Engine type: Turbo-fan
- Power: 91,790 lb thrust
- Data sheet: [TCDS E46NE](https://openairdocs.org/tcds/E46NE) (OpenAirDocs)
- Holder: Pratt & Whitney RTX Corporation (formerly United Technologies Corporation)
- Installed in: 2 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-pw4090

Model codes come from the FAA registry's reference file.

## 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 2026-17-08](https://openairdocs.org/ad/2026-17-08): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074D, PW4077D, PW4084D and 2 more. Effective Oct 8, 2026
- [AD 2026-09-02](https://openairdocs.org/ad/2026-09-02): Turbine Engine Compressor Section · Pratt & Whitney RTX PW4074, PW4074D, PW4077 and 4 more. Effective Jun 26, 2026
- [AD 2023-22-02](https://openairdocs.org/ad/2023-22-02): Turbine Engine Combustion Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Dec 26, 2023
- [AD 2023-19-02](https://openairdocs.org/ad/2023-19-02): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Nov 7, 2023
- [AD 2022-07-13](https://openairdocs.org/ad/2022-07-13): Engine Oil Cooler · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective May 2, 2022
- [AD 2022-06-09](https://openairdocs.org/ad/2022-06-09): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Apr 15, 2022
- [AD 2017-05-05](https://openairdocs.org/ad/2017-05-05): Failure of the HPT 1st stage hub · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Apr 13, 2017
- [AD 2014-23-01](https://openairdocs.org/ad/2014-23-01): Second-stage HPT air seal · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Dec 26, 2014
- [AD 2012-18-17](https://openairdocs.org/ad/2012-18-17): HPC drum rotor disk assembly · Pratt & Whitney Division PW4052, PW4056, PW4060 and 16 more. Effective Oct 22, 2012
- [AD 2010-24-09](https://openairdocs.org/ad/2010-24-09): No. 3 bearing oil pressure tubes · Pratt & Whitney Division PW4050, PW4052, PW4056 and 34 more. Effective Dec 28, 2010
- [AD 2009-04-02](https://openairdocs.org/ad/2009-04-02): Front turbine hub · Pratt & Whitney Division PW4090 and PW4090-3. Effective Mar 24, 2009
- [AD 2007-04-26](https://openairdocs.org/ad/2007-04-26): High pressure compressor (HPC) exit brush seal packs · Pratt & Whitney Division PW4077D, PW4084D, PW4090 and 1 more. Effective Apr 2, 2007
- [AD 2006-22-13](https://openairdocs.org/ad/2006-22-13): Anti-rotation slots · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 5 more. Effective Dec 7, 2006
- [AD 2005-25-09](https://openairdocs.org/ad/2005-25-09): Engine manufacturer's time limits section (TLS) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 26 more. Effective Jun 12, 2006
- [AD 2003-26-09](https://openairdocs.org/ad/2003-26-09): Engine High Pressure Turbine (HPT) Assembly Hardware · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 7 more. Effective Dec 3, 2003
- [AD 2003-13-11](https://openairdocs.org/ad/2003-13-11): High Pressure Compressor (HPC) Rear Case J Flange · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 3 more. Effective Jul 15, 2003
- [AD 2002-09-01](https://openairdocs.org/ad/2002-09-01): 15th Stage High Pressure Compressor (HPC) Disk · Pratt & Whitney Division PW4074D, PW4077D, PW4090 and 3 more. Effective Jun 6, 2002
- [AD 2001-20-02](https://openairdocs.org/ad/2001-20-02): 2nd Stage High Pressure Turbine Air Seal Assembly · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 7 more. Effective Nov 5, 2001

Historical (superseded or no longer in force):

- [AD 2021-05-51](https://openairdocs.org/ad/2021-05-51) (historical): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Mar 24, 2021
- [AD 2019-03-01](https://openairdocs.org/ad/2019-03-01) (historical): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Mar 22, 2019
- [AD 2018-21-11](https://openairdocs.org/ad/2018-21-11) (historical): Turbine Engine Compressor Section · Pratt & Whitney Division PW4074D, PW4077D, PW4084D and 2 more. Effective Dec 5, 2018
- [AD 2018-02-10](https://openairdocs.org/ad/2018-02-10) (historical): Turbine Engine Combustion Section · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Feb 26, 2018
- [AD 2013-15-09](https://openairdocs.org/ad/2013-15-09) (historical): HPT air seals · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 4 more. Effective Sep 17, 2013
- [AD 2010-18-13](https://openairdocs.org/ad/2010-18-13) (historical): Blade · Pratt & Whitney Division PW4052, PW4056, PW4060 and 16 more. Effective Oct 18, 2010
- [AD 2006-17-08](https://openairdocs.org/ad/2006-17-08) (historical): HPC exit inner and outer brush seal assembly · Pratt & Whitney Division PW4077D, PW4084D, PW4090 and 1 more. Effective Sep 27, 2006
- [AD 2003-22-09](https://openairdocs.org/ad/2003-22-09) (historical): Turbine exhaust case (TEC) · Pratt & Whitney Division PW4074, PW4074D, PW4077 and 7 more. Effective Dec 3, 2003
- [AD 2002-03-08](https://openairdocs.org/ad/2002-03-08) (historical): Time Limits Section of Engine Manuals (EM's) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 25 more. Effective Apr 16, 2002
- [AD 2000-12-02](https://openairdocs.org/ad/2000-12-02) (historical): Critical Life-Limited Part · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Sep 13, 2000
- [AD 99-08-15](https://openairdocs.org/ad/99-08-15) (historical): Pratt & Whitney Division PW4050, PW4052, PW4056 and 20 more. Effective May 13, 1999

## Information bulletins (advisory) (3)

- [SAIB NE-16-01R1](https://openairdocs.org/saib/NE-16-01R1): Turbine Section. Issued Jan 14, 2016
- [SAIB NE-16-01](https://openairdocs.org/saib/NE-16-01) (historical): Turbine Section. Issued Oct 5, 2015
- [SAIB NE-13-31](https://openairdocs.org/saib/NE-13-31): Turbine Engine Oil System  Scavenge Oil Tube Coking and Proper Cleaning at Overhaul. Issued May 9, 2013

## Registered aircraft (2)

- [N772ET](https://openairdocs.org/aircraft/N772ET): [Alta 777 LLC](https://openairdocs.org/faa-owner/ALTA%20777%20LLC), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 2001, S/N 29747
- [N794UA](https://openairdocs.org/aircraft/N794UA): [United Airlines Inc](https://openairdocs.org/faa-owner/UNITED%20AIRLINES%20INC), [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago), built 1997, S/N 26953

## NTSB investigations (1)

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 DCA10FA064](https://openairdocs.org/ntsb/DCA10FA064), May 25, 2010: Boeing 777 (N794UA), Southern Tip of Greenland, Denmark, no damage. Probable cause: An inadvertent encounter with unforecast turbulence in cruise flight.

## 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.

- [Accident 20100525034839A](https://openairdocs.org/incident/20100525034839A), May 25, 2010: Boeing 777-222 (N794UA), No damage. UA935 operated lhr to lax on 05/25/2010. Dispatcher's comments on the flight plan release indicated "forecast moderate enroute turbulence from 69W - 77W…

## Service difficulty reports (1,388, newest 50)

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

- [SDR CALA2026102320548](https://openairdocs.org/sdr/CALA2026102320548), Oct 22, 2026: ENGINE. FAULTED. EHM DATA TRENDS INDICATE GAS PATH AND PERFORMANCE SHIFTS. AT NEXT CONVENIENT OPPORTUNITY PLEASE CONDUCT TCC VIS UAL & FUNCTIONAL INSPECTIONS PER AMM 75-24-00-60
- [SDR CALA2026102320532](https://openairdocs.org/sdr/CALA2026102320532), Oct 20, 2026: TUBE. DISCONNECTED. ON TAKEOFF, RETRACTED LANDING GEAR, A LOUD NOISE, DRAG & VIBRATION THRU ACFT. UPON ARRIVAL AT GATE, FOUND RT AFT NLG DOOR ACTUATING TUBE SEPARATED FROM THE DOOR
- [SDR CALA2026101620415](https://openairdocs.org/sdr/CALA2026101620415), Oct 15, 2026: CHARGER. NO TEST. L2 DOOR, EMERGENCY LIGHT BATTERY CHARGER TEST FAILED. BATTERY CHARGER REPLACED AND TESTED NORMAL IAW AMM 33-51-06.
- [SDR CALA2026101620418](https://openairdocs.org/sdr/CALA2026101620418), Oct 15, 2026: CHARGER. NO TEST. L2 DOOR, EMERGENCY LIGHT BATTERY CHARGER TEST FAILED. CHARGER REPLACED & TESTED NORMAL IAW AMM 33-51-06.
- [SDR CALA2026101620420](https://openairdocs.org/sdr/CALA2026101620420), Oct 15, 2026: CHARGER. NO TEST. L3 DOOR, EMERGENCY LIGHT BATTERY CHARGER TEST FAILED. THE CHARGER WAS REPLACED AND TESTED NORMAL IAW AMM33-51-06.
- [SDR CALA2026101620422](https://openairdocs.org/sdr/CALA2026101620422), Oct 15, 2026: BATTERY. NO TEST. SUPPORT TASK - L4 DOOR EMER LIGHT POWER SUPPLY M33407 TEST FAILED. TRANSFER NON-ROUTINE HX WO.7336103 AND ORIGINATED BY V943251 DOOR 4L M33407 EMERGENCY LIGHT B
- [SDR CALA2026101620424](https://openairdocs.org/sdr/CALA2026101620424), Oct 15, 2026: BATTERY. NO TEST. R4 DOOR EMER LIGHT POWER SUPPLY M33408 TEST FAILED. EMER LT PWR SUPPLY BATTERY REPLACED AND TESTED NORMAL IAW AMM33-51-06.
- [SDR CALA2026101620426](https://openairdocs.org/sdr/CALA2026101620426), Oct 15, 2026: CHARGER. NO TEST. DR 2R M33098 EMER LT BATTERY CHARGER TEST FAIL. EMERGENCY BATTERY CHARGER REPLACED AND TESTED NORMAL AS PER AMM 33-51-06.
- [SDR CALA2026101620428](https://openairdocs.org/sdr/CALA2026101620428), Oct 15, 2026: BATTERY. NO TEST. L1 DOOR EMER LIGHT POWER SUPPLY M33093 TEST FAILED. POWER SUPPLY BATTERY REPLACED & TESTED NORMAL IAW AMM33-51-06.
- [SDR CALA2026101620430](https://openairdocs.org/sdr/CALA2026101620430), Oct 15, 2026: BATTERY. NO TEST. DOOR 4R M33409 EMER LT BATTERY TEST FAIL. EMERGENCY LIGHT BATTERY REPLACED AND TESTED NORMAL IAW AMM33-51-06.
- [SDR CALA2026101620432](https://openairdocs.org/sdr/CALA2026101620432), Oct 15, 2026: BATTERY. NO TEST. LLAR EMERGENCY LIGHT BATTERY TEST FAILED. EMERGENCY LIGHT BATTERY REPLACED AND TESTED NORMAL IAW AMM33-51-06.
- [SDR CALA2026101220273](https://openairdocs.org/sdr/CALA2026101220273), Oct 10, 2026: BATTERY PACK. NO TEST. EMERGENCY LIGHTS - OPERATIONAL TEST WITH THE CONTROL SWITCHES PROCEDURE - EMERGENCY LIGHTS FROM POWER SUPPLY M33098 (DOOR 2R) INOP. M33098 POWER SUPPLY BATTERY 
- [SDR CALA2026101320316](https://openairdocs.org/sdr/CALA2026101320316), Oct 10, 2026: LAVATORY. INOPERATIVE. ALL LAVS INOPERATIVE, AIRBORNE FOUND THREE CIRCUT BREAKERS OPEN P110 N (17). P210 N(6) AND N(7). PREFORMED GROUND LAV OPS CKS ALL LAVS OPS NORMALLY. AMM 38-32-0
- [SDR CALA2026101520372](https://openairdocs.org/sdr/CALA2026101520372), Oct 10, 2026: WINDSHIELD. FAILED. RIGHT FWD WINDOW SHATTERED 37000 FEET. WINDOW REPLACED PER EC5610-01247C IAW AMM 56-11-01/401. OPS TESTED RT WINDOW HEAT CONTROLLER IAW AMM 30-41-00-710-801. TE
- [SDR CALA2026101220261](https://openairdocs.org/sdr/CALA2026101220261), Oct 9, 2026: A/C PACK. FAULTED. PACK MODE L EICAS. COULD SMELL ACRID ODOR AND HEAT. 4 MIN LATER RECEIVED EICAS MESSGAE. APPLED MEL 2152S, CONDITIONAL INSPECTION TASK 05-51-58-800-801-C3. NO OD
- [SDR CALA2026100820235](https://openairdocs.org/sdr/CALA2026100820235), Oct 6, 2026: POWER SUPPLY. FAULTED. DURING EMERGENCY LIGHT INSPECTION FOUND DOOR 2L INSIDE AFT EXIT SIGN & DOOR 2L SLIDE LIGHT INOP. AFTER TROUBLESHOOTING FOUND FAULTY POWER SUPPLY. REPLACED DOOR 
- [SDR CALA2026100620144](https://openairdocs.org/sdr/CALA2026100620144), Oct 3, 2026: DOOR. DAMAGED. RIGHT ENGINE NACELLE DRAIN ACCESS PANEL FOUND OPEN ON ARRIVAL. R & R DOOR ASSEMBLY IAW AMM 78-31-19. DOOR ADJUSTED AND OPS CHECK CARRIED OUT, FOUND SATISFACTORY
- [SDR CALA2026092919957](https://openairdocs.org/sdr/CALA2026092919957), Sep 27, 2026: BATTERY. NO TEST. THE EMERGENCY LIGHT BATTERY PACK DEEP CYCLE CHECK FOUND BATTERY LOW ON THE DOOR 1R POWER SUPPLY M33094, REF HAECO NR L/P 9469259. REPLACED BATTERY PACK AT DOOR 
- [SDR CALA2026092319717](https://openairdocs.org/sdr/CALA2026092319717), Sep 20, 2026: LIFE VEST. OPEN. DURING LIFE VEST DETAILED CHECK PROCEDURE, SPARE INFANT LIFE VEST NR G9 UNSEALED. REMOVED UNSEALED LIVE VEST IAW DWG 2560DD15032 IT IS NOT NECESSARY.
- [SDR CALA2026092319719](https://openairdocs.org/sdr/CALA2026092319719), Sep 20, 2026: LIFE VEST. OPEN. DURING A LIFE VEST DETAILED CHECK PROCEDURE, MISSING TWO OF THE SPARE LIVE VEST POUCH NR 914, FOUND SPARE INFANT LIFE VESTS UNSEALED. REMOVED AND REPLACED SPARE
- [SDR CALA2026092319722](https://openairdocs.org/sdr/CALA2026092319722), Sep 20, 2026: MASK. MISSING. RESUSCITATOR, CPR MASKS AT R1 DOOR, OPENED AND MISSING PARTS. R & R IAW GMM 05-20-10.
- [SDR CALA2026092119594](https://openairdocs.org/sdr/CALA2026092119594), Sep 18, 2026: TIRE TREAD. SEPARATED. NR 7 MLG TIRE TREAD LOSS CONDITION, FOUND ON ARRIVAL LT.
- [SDR CALA2026091519457](https://openairdocs.org/sdr/CALA2026091519457), Sep 11, 2026: ENGINE. OVERTEMP. MAX TO R ENG OVRTMP - PERFORMED TROUBLE SHOOTING REF FIM 71-05 TASK 833. PERFORMED EGT OVERTEMPERATURE INSP REF AMM 72-00-00-290-828-N02H(1) AND H(2) NIL DEFECT
- [SDR CALA2026090719286](https://openairdocs.org/sdr/CALA2026090719286), Sep 5, 2026: BATTERY PACK. NO TEST. R1 DOOR EMERGENCY POWER ASSIST SYSTEM (EPAS) BATTERY OPS TEST DID NOT WORK.
- [SDR CALA2026090419237](https://openairdocs.org/sdr/CALA2026090419237), Sep 3, 2026: FAIRING. MISSING. PDA 2 ENG #1 FAN BLADE FAIRING NUMBER 13 DAMAGED. NR 13 FAN EXIT FAIRING REPLACED IAW AMM 72-31-03-000-801-N00 & 72-31-03-400-801-N00. FOUND ENG 1 FAN BLADE NR 
- [SDR CALA2026090719264](https://openairdocs.org/sdr/CALA2026090719264), Sep 3, 2026: VENT. FOD. ON TAKEOFF AND APPROACH BELOW 10K AIR SMELLS LIKE DIRTY SOCKS. FOUND DEBRIS IN CAPT'S AIR CONDITIONING VENT. CLEARED DEBRIS THEN RAN AIR CONDITIONING PACKS AND 
- [SDR CALA2026090219182](https://openairdocs.org/sdr/CALA2026090219182), Sep 1, 2026: BATTERY. NO TEST. R2 DOOR EMERGENCY POWER ASSIST SYSTEM (EPAS) BATTERY OPERATIONAL TEST DO NOT WORK. EPAS BATTERY OPS TEST DID NOT TEST.
- [SDR CALA2026090219190](https://openairdocs.org/sdr/CALA2026090219190), Aug 31, 2026: WASTE TANK. FAILED. TOILET FLUSH SYS INOP. LAV 2R & LAV 4L. INDICATOR SAYS LAV TANKS FULL. OPENED AFT CARGO, CHKD LOGIC CONTROL MODULE OF WASTE TANK 3 & FOUND WASTE TANK IMPLODED. 
- [SDR CALA2026083119017](https://openairdocs.org/sdr/CALA2026083119017), Aug 29, 2026: BATTERY PACK. NO TEST. THE EMERGENCY LIGHT BATTERY PACK, DEEP CYCLE CHECK FOUND BATTERY LOW ON THE DOOR 2R POWER SUPPLY M33097. REPLACED M33097 BATTERY PACK AND INSTALLED INSPECTION I
- [SDR CALA2026083119019](https://openairdocs.org/sdr/CALA2026083119019), Aug 29, 2026: BATTERY. NO TEST. LLAR BACK UP LIGHT BATTERY LOW. REPLACED LLAR BACK UP LIGHT BATTERY PACK. . INSTALLATION TEST FOUND NORMAL IAW AMM 33-29-01-960-809, REV 107, GMM 09-10-05, REV 
- [SDR CALA2026083119021](https://openairdocs.org/sdr/CALA2026083119021), Aug 29, 2026: BATTERY PACK. FAULTED. THE EMERGENCY LIGHT BATTERY PACK, DEEP CYCLE CHECK FOUND BATTERY LOW ON R2 DOOR POWER SUPPLY M33098. REPLACED M33098 BATTERY PACK, INSTALLATION INSPECTION AND I
- [SDR CALA2026082618926](https://openairdocs.org/sdr/CALA2026082618926), Aug 23, 2026: ADIRU. FAULTED. TCAS FAIL, BOTH CHANNELS. DEBRIEF WITH CREW, TCAS FAILED AT 15000 FT, CREW PUT IN ALT, 1 & 2, NO HELP. NO MSSG AT THIS TIME. TCAS STATUS MESSAGE PRESENT, NOT AC
- [SDR CALA2026090119169](https://openairdocs.org/sdr/CALA2026090119169), Aug 23, 2026: UNKNOWN. SMOKE. CREW REPORTED SMOKE IN COCKPIT AND CABIN. SMOKE IN COCKPIT AND CABIN FROM P-300 PANEL HEAT DAMAGE. REF LOG PAGE 3078470 WORK COMPLETED AND SIGN OFFS.
- [SDR CALA2026081418634](https://openairdocs.org/sdr/CALA2026081418634), Aug 13, 2026: BATTERY PACK. NO TEST. EMERGENCY LIGHTS OPERATIONAL TEST, WITH THE TEST SWITCHES PROCEDURE. PACK BATTERY EMERGENCY POWER M33407, M33408 AND M33409 INOP. EMERGENCY POWER BATTERY PACKS 
- [SDR CALA2026071217689](https://openairdocs.org/sdr/CALA2026071217689), Jul 10, 2026: ENGINE. FAULTED. ACFT RETURN TO FIELD. PER CAPTAIN. APROX. FL 31K FELT SLIGHT BUMP. IMMEDATLY HAD HIGH EGT NR 2 FOLLOWED BY AUTO SD. ON INSPECTION AT MAINTENCE FOUND METAL DEBRI
- [SDR CALA2026051116107](https://openairdocs.org/sdr/CALA2026051116107), May 6, 2026: FMU. FAULTY. LEFT ENG FUEL VALVE MESSAGE. LEFT ENGINE: MESSAGE NOT LATCH RESET AND RAN ENG BLOW OUT FUMES, STARTED ENG NORMAL PARAMETERS NORMAL START, AT SHUT DOWN SMOKE ON 
- [SDR CALA2026031814638](https://openairdocs.org/sdr/CALA2026031814638), Mar 12, 2026: ENGINE. ABNORMAL. LEFT ENGINE EGT EXCEEDANCE ON TAKE OFF. MAX EGT 700 CONFIRMED IAW AMM 72-00-00-290-828-N02, ENGINE EGT EXCEEDANCE TO 700C FALLS IN ZONE C PER FIGURE 603 SHEET 2
- [SDR CALA2026021113700](https://openairdocs.org/sdr/CALA2026021113700), Jan 30, 2026: ENGINE. FAILED. RIGHT ENGINE COMPRESSOR STALL ON APPROACH. IAW AMM 72-00-00, REV 106. ON ARRIVAL FOUND NR 2 ENGINE WITH THE LOW PRESSURE COMPRESSOR EXIT FAIRING COMPLETELY DETA
- [SDR CALA2025122212311](https://openairdocs.org/sdr/CALA2025122212311), Dec 18, 2025: ENGINE. MAKING METAL. RIGHT ENG FAILED. OIL PRESSURE ZERO. LOUD BANG & SURGE. DEBRIEFED CREW, ENG WINDMILLED FOR 2.5HRS, SHUTDOWN AFTER A COMPRESSOR STALL AS PRECAUTION DUE TO FLUCTU
- [SDR CALA2025112711506](https://openairdocs.org/sdr/CALA2025112711506), Nov 25, 2025: BLADE. DAMAGED. NUMBER 1 ENGINE FAN BLADE FAIRING N6 HAD PART OF THE TRAILING EDGE OF THE FAIRING THAT DEPART THE AIRPLANE. THE PART MISSING IS 8 BY 6 INCHES, (24 SQ INCHES) PE
- [SDR CALA2025111211167](https://openairdocs.org/sdr/CALA2025111211167), Nov 10, 2025: EEC. FAULTED. REJECTED TAKE OFF FOR ENG FAILURE INDICATION FOLLOWD BY ENG FAIL AND EEC FAIL IAW FIM 77-11 TASK 805 P2 AND P5 ON EPCS PAGE. CHECKED SIMILAR LEAKAGE CHECK FOR B
- [SDR CALA2025102010273](https://openairdocs.org/sdr/CALA2025102010273), Oct 20, 2025: ENGINE. BIRD INGESTION. BIRD STRIKE FOUND ON ENG #2. ACCOMPLISH BIRDSTRIKE INSPECTION AS PER AMM 72-00-00-210-808-N02 (601) AND CONDITIONAL INSPECTION AS PER AMM 05-51-18-210-801 (201)
- [SDR CALA2025072806954](https://openairdocs.org/sdr/CALA2025072806954), Jul 23, 2025: TRANSMITTER. FAULTED. CREW REPORTED LOW OIL QTY & LOW OIL PRESSURE JUST BEFORE TOP OF DESCENT WITH ENG 2. CREW SHUT DOWN #2 ENG FOR THE REMAINING FLIGHT. OIL QUANTITY RECOVERED BEFOR
- [SDR CALA2025072506910](https://openairdocs.org/sdr/CALA2025072506910), Jul 22, 2025: BLADE. DAMAGED. REF L/P 5642792, DUE TO BLADE DAMAGE ON #1 ENGINE, PLEASE COMPLETE FOD INGESTION INSPECTION PER AMM 72-00-00-210-807-N02 ACP'D INSPECTION OF #1 ENG DUE TO #7 FA
- [SDR CALA2025062706005](https://openairdocs.org/sdr/CALA2025062706005), Jun 23, 2025: THERMOCOUPLE. FAULTED. ADVISORY MSG ENG ELC C1 R REP FAULT CODE 75-61062 ITEM DEFERRED AS PER MEL 7321D. FOUND PROBE M75019 OPEN BETWEEN CR STUD AND AL STUD. FOUND PROBE M75008 WITH H
- [SDR CALA2025062305792](https://openairdocs.org/sdr/CALA2025062305792), Jun 21, 2025: ENGINE. NO DISCREPANCY. RIGHT ENG OVERHEAT REF LP 5281291. INTERROGATED #2 ENG EXCEEDANCE PAGE, FOUND EGT OVERTEMPERATURE CONDITION TO BE WITHIN LIMITS REF AMM TASK 72-00-00-290-828-N0
- [SDR CALA2025061605568](https://openairdocs.org/sdr/CALA2025061605568), Jun 13, 2025: ENGINE. FAULTED. RIGHT ENGINE EGT EXC. 706. ON CLB OUT RET W/IN LIMITS. CREW REPORTS ON CLIMB OUT EST. 1000FT - AUTO THROTTLE ENGAGED, ENG 2 EGT REDLINED. CREW PROCEEDED TO REDU
- [SDR CALA2025060305220](https://openairdocs.org/sdr/CALA2025060305220), May 31, 2025: THERMOCOUPLE. FAULTY. EGT EXCEEDENCE ENG R DURING INITIAL CLIMB. RE DUCED THRUST EGT N ORML FAULT MESSAGE 75-50802 WAS SHOWN ON MAT. TCA THERMOCOUPLE PROBE TEMPERATURE RANGE CH B HAS
- [SDR CALA2025060405270](https://openairdocs.org/sdr/CALA2025060405270), May 31, 2025: ENGINE. MAKING METAL. CREW REPORTS - #1 ENG FAILED CREW REPORTS- #1 ENG FAILED 400FT AGL 10 SEC AFTER ROTATION, EGT SPIKED (RED LINED) TO 785, SHOWED 605 AFTER ENGINE SHUTDOWN. A/ C 
- [SDR CALA2025053005133](https://openairdocs.org/sdr/CALA2025053005133), May 26, 2025: BLADE. BROKEN. RIGHT ENGINE, EGT LIMIT EXCEEDED, MAINT MSG 77-62122, VISUAL CHECKED RIGHT ENGINE EXHAUST LAST STAGE TURBINE BLADE BROKEN.

All 1,388: https://openairdocs.org/engine/pratt-whitney-pw4090/reports.md

## STCs that may be installed (OpenAirDocs) (1)

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 SE00053AT-D](https://openairdocs.org/stc/SE00053AT-D): Modification of fan exit guide vane, to line replaceable unit configuration. Chromalloy Gas Turbine Corp

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