# Pratt & Whitney PW4056

- Type: Engine model (FAA registry)
- Registry code: 51665
- Manufacturer (registry): P & W
- Model: PW4056
- Engine type: Turbo-fan
- Power: 56,750 lb thrust
- Data sheet: [TCDS E24NE](https://openairdocs.org/tcds/E24NE) (OpenAirDocs)
- Holder: Pratt & Whitney Division
- Installed in: 25 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-pw4056

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 2026-21-06](https://openairdocs.org/ad/2026-21-06): Engine Fuel and Control · Pratt & Whitney Division PW4052, PW4056, PW4060 and 10 more. Effective Nov 23, 2026
- [AD 2018-13-02](https://openairdocs.org/ad/2018-13-02): Turbine Engine Combustion Section · Pratt & Whitney Division PW4052, PW4056, PW4060 and 7 more. Effective Jul 20, 2018
- [AD 2016-08-09](https://openairdocs.org/ad/2016-08-09): HPC 10th stage disk · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Jun 1, 2016
- [AD 2015-22-03](https://openairdocs.org/ad/2015-22-03): LPT 4th stage IAS · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Dec 1, 2015
- [AD 2012-22-16](https://openairdocs.org/ad/2012-22-16): 3rd stage LPT duct segments · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Dec 19, 2012
- [AD 2012-14-09](https://openairdocs.org/ad/2012-14-09): 3rd and 4th stage vane fractures · Pratt & Whitney Division PW4050, PW4052, PW4056 and 24 more. Effective Nov 7, 2012
- [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 2012-18-03](https://openairdocs.org/ad/2012-18-03): 1st stage HPT air seal rings · Pratt & Whitney Division PW4050, PW4052, PW4056 and 18 more. Effective Oct 11, 2012
- [AD 2012-16-01](https://openairdocs.org/ad/2012-16-01): High-pressure turbine (HPT) stage 1 front hubs · Pratt & Whitney Division PW4052, PW4056, PW4060 and 14 more. Effective Sep 28, 2012
- [AD 2012-06-18](https://openairdocs.org/ad/2012-06-18): Engine · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Apr 27, 2012
- [AD 2012-04-04](https://openairdocs.org/ad/2012-04-04): fuel metering units (FMUs) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 13 more. Effective Apr 5, 2012
- [AD 2011-25-09](https://openairdocs.org/ad/2011-25-09): PW4000 turbofan engines · Pratt & Whitney Division PW4050, PW4052, PW4056 and 18 more. Effective Jan 10, 2012
- [AD 2010-24-14](https://openairdocs.org/ad/2010-24-14): HPC 10th stage disk · Pratt & Whitney Division PW4050, PW4052, PW4056 and 17 more. Effective Jan 21, 2011
- [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 2008-24-13](https://openairdocs.org/ad/2008-24-13): Electronic engine controls (EECs) · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Jan 8, 2009
- [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 2003-19-15](https://openairdocs.org/ad/2003-19-15): High-Pressure-Compressor (HPC) Surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Oct 30, 2003
- [AD 2002-12-15](https://openairdocs.org/ad/2002-12-15): Front Drum Rotors · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Jul 31, 2002
- [AD 2001-05-07](https://openairdocs.org/ad/2001-05-07): Low Pressure Turbine (LPT) 4th Stage Air Seal · Pratt & Whitney Division PW4052, PW4056, PW4060 and 11 more. Effective Mar 30, 2001
- [AD 99-15-01](https://openairdocs.org/ad/99-15-01): Low Pressure Turbine Disks · Pratt & Whitney Division PW4056, PW4152, PW4156A and 3 more. Effective Sep 14, 1999
- [AD 98-23-08](https://openairdocs.org/ad/98-23-08): High Pressure Compressor  Blade Tips · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jan 12, 1999
- [AD 98-19-03](https://openairdocs.org/ad/98-19-03): High Pressure Turbine Rotating Airseals · Pratt & Whitney Division PW4052, PW4056, PW4060 and 9 more. Effective Nov 9, 1998
- [AD 96-13-08](https://openairdocs.org/ad/96-13-08): AFT Cascade Support Frame Assembly · Pratt & Whitney assembly Part Number 221D5015, Revision A (STC SE744NE). Effective Aug 1, 1996
- [AD 93-08-16](https://openairdocs.org/ad/93-08-16): Fuel Pump · Pratt & Whitney Division PW4050, PW4052, PW4056 and 2 more. Effective Jul 12, 1993
- [AD 90-22-02](https://openairdocs.org/ad/90-22-02): Low Pressure Turbine Shaft · Pratt & Whitney Division PW4050, PW4052, PW4056 and 6 more. Effective Oct 18, 1990

Historical (superseded or no longer in force):

- [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 2003-11-18](https://openairdocs.org/ad/2003-11-18) (historical): High-Pressure-Compressor (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jul 7, 2003
- [AD 2002-21-10](https://openairdocs.org/ad/2002-21-10) (historical): High pressure compressor (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Nov 12, 2002
- [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 2001-25-11](https://openairdocs.org/ad/2001-25-11) (historical): Compressor Surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Jan 17, 2002
- [AD 2001-20-13](https://openairdocs.org/ad/2001-20-13) (historical): High Pressure Compressor Front Drum Rotors · Pratt & Whitney Division PW4052, PW4056, PW4060 and 6 more. Effective Nov 16, 2001
- [AD 2001-15-12](https://openairdocs.org/ad/2001-15-12) (historical): High Pressure Compressors (HPC) · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective Aug 10, 2001
- [AD 2001-09-07](https://openairdocs.org/ad/2001-09-07) (historical): High Pressure Compressor (HPC) Surge · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more. Effective May 14, 2001
- [AD 2001-08-52](https://openairdocs.org/ad/2001-08-52) (historical): Multiple-engine power loss due to HPC surges · Pratt & Whitney Division PW4050, PW4052, PW4056 and 12 more
- [AD 2000-25-06](https://openairdocs.org/ad/2000-25-06) (historical): Low Pressure Turbine (LPT) 4th Stage Air Seal · Pratt & Whitney Division PW4052, PW4056, PW4060 and 11 more. Effective Dec 29, 2000
- [AD 2000-22-01](https://openairdocs.org/ad/2000-22-01) (historical): High Pressure Compressor Cutback Stator · Pratt & Whitney Division PW4050, PW4052, PW4056 and 6 more. Effective Nov 9, 2000
- [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 99-17-16](https://openairdocs.org/ad/99-17-16) (historical): Pratt & Whitney Division PW4050, PW4052, PW4056 and 11 more. Effective Sep 24, 1999
- [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) (6)

- [SAIB 2025-06](https://openairdocs.org/saib/2025-06): High Pressure Turbines. Issued Jul 22, 2025
- [SAIB NE-19-02](https://openairdocs.org/saib/NE-19-02): Turbine Engine Compressor Section -- Low-pressure turbine uncontainment. Issued Feb 19, 2019
- [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-15-19](https://openairdocs.org/saib/NE-15-19): Turbine Section. Issued Jul 14, 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 (25)

- [N197UA](https://openairdocs.org/aircraft/N197UA): [United Airlines Inc](https://openairdocs.org/faa-owner/UNITED%20AIRLINES%20INC), [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago), built 1997, S/N 26901
- [N351SL](https://openairdocs.org/aircraft/N351SL): [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 2018, S/N 001
- [N471MC](https://openairdocs.org/aircraft/N471MC): [Atlas Air Inc](https://openairdocs.org/faa-owner/ATLAS%20AIR%20INC), [White Plains, NY](https://openairdocs.org/faa-place/NY/White%20Plains), built 1997, S/N 26557
- [N489MC](https://openairdocs.org/aircraft/N489MC): [Atlas Air Inc](https://openairdocs.org/faa-owner/ATLAS%20AIR%20INC), [Purchase, NY](https://openairdocs.org/faa-place/NY/Purchase), built 1995, S/N 26553
- [N701CK](https://openairdocs.org/aircraft/N701CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2000, S/N 26416
- [N702CA](https://openairdocs.org/aircraft/N702CA): [Ac Spe 5 LLC](https://openairdocs.org/faa-owner/AC%20SPE%205%20LLC), [Orlando, FL](https://openairdocs.org/faa-place/FL/Orlando), built 1994, S/N 27217
- [N702CK](https://openairdocs.org/aircraft/N702CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2000, S/N 26411
- [N703CK](https://openairdocs.org/aircraft/N703CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1990, S/N 24226
- [N705CK](https://openairdocs.org/aircraft/N705CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2001, S/N 26413
- [N706CK](https://openairdocs.org/aircraft/N706CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2001, S/N 27073
- [N707CK](https://openairdocs.org/aircraft/N707CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1992, S/N 26395
- [N708CK](https://openairdocs.org/aircraft/N708CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1991, S/N 25275
- [N709CK](https://openairdocs.org/aircraft/N709CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1993, S/N 26396
- [N710CK](https://openairdocs.org/aircraft/N710CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1997, S/N 26406
- [N712CK](https://openairdocs.org/aircraft/N712CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2002, S/N 26414
- [N713CK](https://openairdocs.org/aircraft/N713CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2003, S/N 32808
- [N715CK](https://openairdocs.org/aircraft/N715CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 2002, S/N 32809
- [N716CK](https://openairdocs.org/aircraft/N716CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1998, S/N 26408
- [N718BA](https://openairdocs.org/aircraft/N718BA): [Boeing Aircraft Holding Co](https://openairdocs.org/faa-owner/BOEING%20AIRCRAFT%20HOLDING%20CO), [Renton, WA](https://openairdocs.org/faa-place/WA/Renton), built 1992, S/N 27042
- [N729CA](https://openairdocs.org/aircraft/N729CA): [Ac Spe 6 LLC](https://openairdocs.org/faa-owner/AC%20SPE%206%20LLC), [Orlando, FL](https://openairdocs.org/faa-place/FL/Orlando), built 1991, S/N 25068
- [N747BC](https://openairdocs.org/aircraft/N747BC): [Boeing Aircraft Holding Co](https://openairdocs.org/faa-owner/BOEING%20AIRCRAFT%20HOLDING%20CO), [Seattle, WA](https://openairdocs.org/faa-place/WA/Seattle), built 1992, S/N 25879
- [N756CA](https://openairdocs.org/aircraft/N756CA): [Ac Spe 4 LLC](https://openairdocs.org/faa-owner/AC%20SPE%204%20LLC), [Orlando, FL](https://openairdocs.org/faa-place/FL/Orlando), built 1991, S/N 26547
- [N780BA](https://openairdocs.org/aircraft/N780BA): [Boeing Aircraft Holding Co](https://openairdocs.org/faa-owner/BOEING%20AIRCRAFT%20HOLDING%20CO), [Renton, WA](https://openairdocs.org/faa-place/WA/Renton), built 1990, S/N 24310
- [N785CK](https://openairdocs.org/aircraft/N785CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1997, S/N 26404
- [N786CK](https://openairdocs.org/aircraft/N786CK): [Kalitta Air LLC](https://openairdocs.org/faa-owner/KALITTA%20AIR%20LLC), [Ypsilanti, MI](https://openairdocs.org/faa-place/MI/Ypsilanti), built 1998, S/N 26407

## NTSB investigations (3)

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 DCA22LA038](https://openairdocs.org/ntsb/DCA22LA038), Nov 29, 2021: Boeing 747-4B5F (N705CK), Miami, FL, substantial damage. Probable cause: Incorrect lubrication of the foreflap fitting assembly.
- [NTSB DCA20CA077](https://openairdocs.org/ntsb/DCA20CA077), Feb 3, 2020: Boeing 747 412 (N703CK), Los Angeles, CA, substantial damage. Probable cause: An unavoidable collision with a garbage dumpster that had blown into the path of the airplane during the takeoff roll.
- [NTSB DCA14IA016](https://openairdocs.org/ntsb/DCA14IA016), Nov 22, 2013: Boeing 747 - 409LCF (N780BA), Wichita, KS, incident, no damage. Probable cause: the flight crew's failure to properly identify the airport and runway of intended landing. Contributing to the incident was the flight crew's failure to follow company procedures for crosschecking…

## FAA accident and incident reports (5)

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 20220629012749I](https://openairdocs.org/incident/20220629012749I), Jun 29, 2022: Boeing 747-4B5 (N707CK), Anchorage, AK, Substantial damage. On 06/29/2022 aircraft [privacy data omitted]was pushed back from vhhh for flight to panc. After departure during the climb as flaps were retracted a heavy…
- [Incident 20211022022329I](https://openairdocs.org/incident/20211022022329I), Oct 22, 2021: Boeing 747-412 (N756CA), Muwaffaq Salti, Minor damage. On October 22, 2021 approximately 0835Z [privacy data omitted] aircraft [privacy data omitted](B-747-412) was damaged in a collision accident with a parked air…
- [Accident 20200203002879A](https://openairdocs.org/incident/20200203002879A), Feb 3, 2020: Boeing 747-412 (N703CK), Los Angeles, CA, Substantial damage. On Monday, February 3, 2020 approximately at 03:08 PST kalitta air, flight CKS368, aircraft N703CK during takeoff on rwy 25R at approximately 100KTS struck…
- [Incident 20070602012399I](https://openairdocs.org/incident/20070602012399I), Jun 2, 2007: Boeing 747409 (N780BA), Idaho Falls, ID, Minor damage. (-23) 6-2-07 Aircraft was conducting operations at Idaho Falls airport on Saturday, June 2, 2007. At approximately 8:28 pm during taxi for takeoff the number 4…
- [Incident 20061207027599I](https://openairdocs.org/incident/20061207027599I), Dec 7, 2006: Boeing 7474J6 (N747BC), Renton, WA. (-23) The Boeing large cargo freighter (lcf) was on departure from bfi heading to the south and had deployed a piece of test equipment called a trailing cone.…

## Service difficulty reports (12,594, newest 50)

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

- [SDR CALA2026073118122](https://openairdocs.org/sdr/CALA2026073118122), Jul 30, 2026: WIRE. DETACHED. DOOR 1L AND 1R EXIT THRESHOLD LIGHT STAY ON WHEN SWITCHED OFF FOUND PIN 3 OPENED BETWEEN CONNECTOR D10718 AND D6410 IAW WDM 33-51-11-2C SH2 FOUND WIRE W822-003-
- [SDR U2RA2026071600037](https://openairdocs.org/sdr/U2RA2026071600037), Jul 12, 2026: PUMP. LEAKING. EICAS -HYD QTY LOW 1- DISPLAYED DURING CRUISE. REPLACED LEAKING NR 1 AIR DRIVEN HYDRAULIC PUMP.
- [SDR KCSA20260619733](https://openairdocs.org/sdr/KCSA20260619733), Jun 17, 2026: OIL SYSTEM. LOW. ON DESCENT NOTICED STRONG ODOR OF OIL ON UPPER DECK AND MAIN DECK CREW REPORTED LOW OIL ON ENG 4, INDICATED 4 QUARTS. PERFORMED CONDITIONAL INSPECTION OF #4 ENG
- [SDR UIEA2026061200463](https://openairdocs.org/sdr/UIEA2026061200463), Jun 12, 2026: CHIP DETECTOR. UNSECURE. ENGINE 1 OIL QUANTITY LOSS IN FLIGHT, SHOWING 0 AT CRUISE STARTED AT 10 AFTER TAKEOFF. ACCOMPLISHED ENGINE OIL INSPECTION PER ECM 2026P-203 REV 0. NO LEAKS FOUN
- [SDR U2RA2026012600030](https://openairdocs.org/sdr/U2RA2026012600030), Jan 19, 2026: BATTERY. INOPERATIVE. DURING A-CHECK AT RKSI, WHILE ACCOMPLISHING T/C 33-050-01-01, FOUND 11 EACH EMERGENCY LIGHT INOPERATIVE. BATTERY ASSY P/N: 2013-1A WAS REPLACED AND DOCUMENTED O
- [SDR KCSA2025113067](https://openairdocs.org/sdr/KCSA2025113067), Nov 30, 2025: THRUST REVERSER. DELAMINATED. THRUST REVERSER INBD NR 4 ENG DELAMINATED AT 10 O'CLOCK POSITION. REMOVED AND REPLACED NR 4 INBD THRUST REVERSER IAW AMM 78-31-01.100278273: INBD THRUST REVERSE
- [SDR KCSA2025111865](https://openairdocs.org/sdr/KCSA2025111865), Nov 18, 2025: PUMP. FAULTED. 100280839: HYD QTY LOW 1 DEMAND PUMP AND ENGINE PUMP BOTH OFF BEFORE SYS FLUID 0. ACTION TAKEN: REMOVED AND REPLACED #1 EDP HYD 1. IAW B747-400 AMM 29-11-05-004
- [SDR U2RA2025060200015](https://openairdocs.org/sdr/U2RA2025060200015), May 31, 2025: SMOKE DETECTOR. FAULTED. FIRE MAIN DECK AFT EICAS MESSAGE DISPLAYED AT THE GATE - REPLACED MULTIPLE MAIN DECK CARGO COMPARTMENT AFT SMOKE DETECTORS.
- [SDR UIEA2025042400570](https://openairdocs.org/sdr/UIEA2025042400570), Apr 24, 2025: ENGINE. FAILED. ENGINE 2 FAILURE IN FLIGHT AT FLIGHT LEVEL 340.(<P>#2 ENGINE UNSCHEDULED ENGINE REMOVAL AND REPLACEMENT SN: P717652CN IAW AMM 71-00-02. NO FURTHER DEFECTS NOTED
- [SDR KCSA202504070112](https://openairdocs.org/sdr/KCSA202504070112), Apr 1, 2025: ENGINE. DAMAGED. ENGINE #2 SEVERE DAMAGE. PERFORMED N1 AND N2 LOCKOUT PER AMM 71-00-30 AND E50 #13891 FOR 3 ENGINE FERRY FLIGHT. ENGINE #2 SEVERE DAMAGE. REMOVED AND REPLACED #2
- [SDR U2RA2024120600067](https://openairdocs.org/sdr/U2RA2024120600067), Nov 28, 2024: BRACKET. BROKEN. DURING SCHEDULED A-CHECK AT HAECO (NE1Y345K), DURING INSPECTION & SERVICING OF THE APU, THE APU DOOR FIRE SENSOR FORWARD MOUNDING BRACKET WAS FOUND BROKE; REFER
- [SDR U2RA2024110400063](https://openairdocs.org/sdr/U2RA2024110400063), Oct 29, 2024: SEAL. DAMAGED. "DURING A-CHECK INSPECTION, IT WAS DISCOVERED THAT THE AFT SEAL, LOCATED ON THE OUTBOARD ENGINE CORE COWL OF ENGINE 1 HAD A MISSING PORTION NEAR THE LOWER CORNE
- [SDR U2RA2024110400064](https://openairdocs.org/sdr/U2RA2024110400064), Oct 29, 2024: SKIN. GOUGED. "DURING A-CHECK INSPECTION, IT WAS DISCOVERED THAT THE SKIN, LOCATED ON THE OUTBOARD ENGINE CORE COWL OF ENGINE 2 HAD A DEEP GOUGE NEAR THE OIL ACCESS PANEL. A 
- [SDR U2RA2024110400065](https://openairdocs.org/sdr/U2RA2024110400065), Oct 29, 2024: SKIN. DAMAGED. "DURING A-CHECK INSPECTION, IT WAS DISCOVERED THAT THE SKIN, LOCATED ON THE OUTBOARD ENGINE CORE COWL OF ENGINE 3 HAD A A MISSING PIECE OF OUTER LAYER MATERIAL 
- [SDR U2RA2024090800052](https://openairdocs.org/sdr/U2RA2024090800052), Aug 28, 2024: BATTERY PACK. DISCHARGED. REF HAECO XMN (TX9Y778Y) NRC#:KUL9753 - FOUND THAT THE UPPER DECK DOOR AREA R/H SIDE M5606 EMERGENCY POWER SUPPLY BATTERY LOW CAPACTIY
- [SDR U2RA2024090800051](https://openairdocs.org/sdr/U2RA2024090800051), Aug 25, 2024: DOOR FRAME. OUT OF LIMITS. "REF HAECO XMN (TX9Y778Y) NRC#:KUL9555 - AN EXISTING OVERSIZED HOLE WAS FOUND ON FRAME STRUCTURE AT STA 2231, STR-25L DURING SB 747-53A2450 REV. 08 INSPECTION. 
- [SDR U2RA2024090800044](https://openairdocs.org/sdr/U2RA2024090800044), Aug 21, 2024: WEB. SCRATCHED. REF HAECO XMN (TX9Y778Y) NRC#: KUL9399 - FWD CARGO COMPARTMENT, STA 660-680 RBL 33-55, MULTIPLE SCRATCHES ON EXISTING REPAIR DOUBLER UPPER SURFACE OF LATERAL BE
- [SDR U2RA2024090800053](https://openairdocs.org/sdr/U2RA2024090800053), Aug 14, 2024: BATTERY. DISCHARGED. REF HAECO XMN (TX9Y778Y) NRC#:KUL8961 - FOUND THAT THE R/H UPPER DECK DOOR BATTERY M7038 IS AT LOW CAPACTIY.
- [SDR U2RA2024090800046](https://openairdocs.org/sdr/U2RA2024090800046), Aug 11, 2024: CHANNEL. CRACKED. REF HAECO XMN (TX9Y778Y) NRC#: KUL8334, KUL8342 & KUL8375 - (2 EA.) P/N G12447-3-3-1882-3 AND (1 EA.) G12447-3-3-1882-4 GANG CHANNELS CRACKED COMMON TO THE VERT
- [SDR U2RA2024090800043](https://openairdocs.org/sdr/U2RA2024090800043), Aug 8, 2024: RUB STRIP. WORN. REF HAECO XMN (TX9Y778Y) NRC#: KUL7419 THE INBOARD FIBERGLASS RUB STRIP OF RHW NO.12 SPOILER FOUND DAMAGED (BROKEN FIBERS). IN ADDITIONAL, WATER CONTAMINATION U
- [SDR U2RA2024090800045](https://openairdocs.org/sdr/U2RA2024090800045), Aug 8, 2024: WEB. DENTED. REF HAECO XMN (TX9Y778Y) NRC#: KUL6304, KUL6288 & KUL6296 TOTAL 5 EA DENTS WERE FOUND ON UPPER SURFACE OF THE AFT CGO LHS LATERAL BEAM WEB (P/N: 65B06295-7), RH
- [SDR U2RA2024090800050](https://openairdocs.org/sdr/U2RA2024090800050), Aug 8, 2024: SKIN. DENTED. REF HAECO XMN (TX9Y778Y) NRC#:KUL6825 - EXISTING DENT AND BLEND-OUT WERE FOUND ON FUSELAGE SKIN AT STA 500, STR-38R-STR-39R. DEVIATIONS OCCUR WHEN PERFORM THE B
- [SDR U2RA2024090800041](https://openairdocs.org/sdr/U2RA2024090800041), Aug 7, 2024: WEB. DENTED. REF HAECO XMN (TX9Y778Y) NRC#: KUL5603 & KUL5561 - FWD CARGO COMPARTMENT STA 660-680 LATERAL BEAM WEB UPPER SURFACE FOUND WITH 8EA DENTS BETWEEN LBL 40.00 TO RB
- [SDR U2RA2024090800048](https://openairdocs.org/sdr/U2RA2024090800048), Aug 6, 2024: SKIN. CORRODED. REF HAECO XMN (TX9Y778Y) NRC#: KUL3384 CORROSION WAS FOUND ON RHW LOWER NO.4 SKIN PANEL NEAR WSTA 614.5.
- [SDR U2RA2024090800049](https://openairdocs.org/sdr/U2RA2024090800049), Aug 6, 2024: FITTING. CRACKED. REF HAECO XMN (TX9Y778Y) NRC#:KUL3186 (CRACK IN RH LONGERON FITTING FLANGE) A CRACK (0.40 INCH LONG) WAS FOUND IN THE RH LONGERON EXTENSION FITTING (P/N: 65B150
- [SDR U2RA2024090800042](https://openairdocs.org/sdr/U2RA2024090800042), Aug 5, 2024: SKIN. DENTED. REF HAECO XMN (TX9Y778Y) NRC#: KUL1552 - (3 EA.) DENTS AND AN EXISTING REPAIR WERE FOUND ON THE INNER SKIN OF THE LH WING INBOARD LANDING GEAR STRUT DOOR. THE D
- [SDR U2RA2024090800047](https://openairdocs.org/sdr/U2RA2024090800047), Aug 5, 2024: SKIN. CONTAMINATED. REF HAECO XMN (TX9Y778Y) NRC#: KUL1503 - WATER CONTAMINATION AND AN EXISTING REPAIR WERE FOUND IN THE FORWARD EDGE OF THE RH WING INBOARD LANDING GEAR STRUT DOO
- [SDR UIEA2024071600680](https://openairdocs.org/sdr/UIEA2024071600680), Jul 16, 2024: ACOUSTIC PANEL. DAMAGED. ENG 3 ACOUSTIC PANEL 7 O'CLOCK POSITION DAMAGED &AMP; LINEAR SEGMENT MISSING(<P>C/W&NBSP; TEMP REPAIR IAW AMM 72-34-01-206-012-N00 &AMP; C/W EA-1978A111, ISSUED
- [SDR U2RA2023101400045](https://openairdocs.org/sdr/U2RA2023101400045), Oct 9, 2023: LINER. MISSING. DURING A SCHEDULED A-CHECK VISIT, DAMAGE WAS FOUND TO THE #4 ENGINE OUTBOARD THRUST REVERSER. FURTHER INSPECTION REVEALED THE #4 OUTER FAN EXIT LINER SEGMENT HA
- [SDR U2RA2023082600042](https://openairdocs.org/sdr/U2RA2023082600042), Aug 22, 2023: CHARGER. INOPERATIVE. DURING SCHEDULED MAINTENANCE, AN OPERATIONAL CHECK OF THE EMERGENCY LIGHTS SYSTEM WAS PERFORMED WITH A FAILURE TO TEST ON LIGHTS L1854, L1853, AND L5735. FOUND 
- [SDR U2RA2023082600043](https://openairdocs.org/sdr/U2RA2023082600043), Aug 22, 2023: UNKNOWN. UNKNOWN. DURING INSPECTION, EVIDENCE OF FUEL LEAKAGE WAS DISCOVERED AT TANK NO. 3 RIGHT HAND WING REAR SPAR TO RIGHT HAND WHEEL WELL JUNCTURE, LIFTED/LOOSE SEALANT DISCO
- [SDR U2RA2023082500041](https://openairdocs.org/sdr/U2RA2023082500041), Aug 21, 2023: BATTERY. INOPERATIVE. UPPER DECK LEFT EMERGENCY EXIT DOOR ASSIST BOTTLE BATTERY WILL NOT TEST - REMOVED AND REPLACED BATTERY PER AIRCRAFT MAINTENANCE MANUAL 52-23-14.
- [SDR U2RA2023061600025](https://openairdocs.org/sdr/U2RA2023061600025), Jun 13, 2023: UNKNOWN. UNKNOWN. UPPER DECK EMERGENCY LIGHT AFT OF RIGHT DOOR INOPERATIVE - DEFERRED PER MINIMUM EQUIPMENT LIST 33-51-01-01.
- [SDR U2RA2023052700023](https://openairdocs.org/sdr/U2RA2023052700023), May 27, 2023: BULB. INOPERATIVE. DURING SCHEDULED A-CHECK MAINTENANCE, OPERATIONAL CHECK OF THE EMERGENCY EXIT LIGHT SYSTEM RESULTED IN FINDING OF INOPERATIVE LIGHT BULB. LIGHT BULB REPLACED IA
- [SDR U2RA2023052700024](https://openairdocs.org/sdr/U2RA2023052700024), May 27, 2023: CARTRIDGE. BURNED. DURING REINSTALLATION OF LEFT UPPER DOOR SLIDE PACK TO FACILITATE OTHER SCHEDULED MAINTENANCE, A CHECK OF THE EMERGENCY POWER RESERVOIR, PER AMM 52-23-13-406-04
- [SDR UIEA2022081200854](https://openairdocs.org/sdr/UIEA2022081200854), Aug 30, 2022: DUCT. BULGED. NO.2 ENG - RH C-DUCT INNER SURFACE BULGED & DELAMINATION REPLACEMENT
- [SDR UIEA2022053100560](https://openairdocs.org/sdr/UIEA2022053100560), May 27, 2022: TRANSMITTER. FLAMED OUT. BTB, ENG 2 TAIL PIPE FIRE OBSERVED BY GROUND OPS. ALL INSPECTIONS C/W TO INCLUDE BSI. VSV AND FUEL FLOW TRANSMITTER REPLACED. T/T HALF TIME LIMIT REPAIR ACCOMPL
- [SDR UIEA2022022000149](https://openairdocs.org/sdr/UIEA2022022000149), Feb 20, 2022: EEC. FAILED. ENGINE #2 FAILED SHORTLY AFTER TAKEOFF (CONVERSATION WITH CAPTAIN INDICATED IFSD ON TAKEOFF AT APPROXIMATELY 1000 AGL. CREW FOLLOWED THE QRH. CREW LEVELED OUT A
- [SDR U2RA2021082300050](https://openairdocs.org/sdr/U2RA2021082300050), Aug 18, 2021: DUCT. DAMAGED. REF. HAITEC W/O H1-21-06-00016/16444, NRC #0022, AND FVCI EO #21149-1: DAMAGE DISCOVERED ON THE #4 ENGINE INBOARD THRUST REVERSER INNER DUCT, OUTER ACOUSTIC PAN
- [SDR KCSA2021032208](https://openairdocs.org/sdr/KCSA2021032208), Mar 22, 2021: EEC. MALFUNCTIONED. IN CRUISE #2 ENGINE ENGINE PRESSURE RATIO, N1, N2 & FUEL FLOW FLUCTUATIONS. REMOVE AND REPLACE #2 ENGINE ELECTRONIC ENGINE CONTROL IAW B747-400 AMM 73-21-04. OP
- [SDR UIEA2021011100028](https://openairdocs.org/sdr/UIEA2021011100028), Jan 6, 2021: ENGINE. ODOR. ON CLIMBOUT & DESCENT WE OBSERVED A VERY STRONG FUME ODOR (DIRTY SOCK SMELL). CARRIED OUT CHAPTER 5 CONDITIONAL INSPECTION FOR FUMES IN THE CABIN, PER AMM 05-51
- [SDR UIEA2020102602310](https://openairdocs.org/sdr/UIEA2020102602310), Oct 26, 2020: UNKNOWN. ODOR. SMELL OF ENGINE OIL DURING ENGINE START TAXI, CLIMB, AND DESCENT. CONDUCTED INSPECTION OF OIL/LEAKS ON ALL 4 ENGINES. RAN ALL 4 ENGINES INDIVIDUALLY WITH ALL 3 
- [SDR U2RA202009200012](https://openairdocs.org/sdr/U2RA202009200012), Aug 15, 2020: SKIN. DELAMINATED. WHILE ACCOMPLISHING TASK CARD 71-830-01-02 FOUND NR 2 ENGINE INBOARD T/R EXTERNAL AND LOWER SURFACE HAVE DELAMINATION ABOUT 3". REPAIRED PER VT-SAA EA 747-5430-
- [SDR U2RA202009190005](https://openairdocs.org/sdr/U2RA202009190005), Aug 5, 2020: STOP FITTING. GOUGED. WHILE ACCOMPLISHING A VISUAL INSPECTION, FOUND NR 1 ENGINE OUTBOARD T/R INTERIOR SIDE UPPER STOP FITTING HAS GOUGES. REPAIRED PER VT-SAA EA 747-5400-56-A8502 RE
- [SDR U2RA202009190006](https://openairdocs.org/sdr/U2RA202009190006), Aug 5, 2020: STOP FITTING. GOUGED. WHILE ACCOMPLISHING A VISUAL INSPECTION FOUND NR 3 ENGINE OUTBOARD T/R INTERIOR SIDE UPPER, FWD STOP FITTING IS GOUGED AND HAS DAMAGED HI-LOCK FASTENER. REPAIRE
- [SDR U2RA202009190003](https://openairdocs.org/sdr/U2RA202009190003), Jul 28, 2020: SKIN. DENTED. WHILE ACCOMPLISHING TASK CARD 71-211-04-02 FOUND NR 2 ENGINE OUTBOARD CORE COWL INTERIOR AFT RIB LOWER SIDE HAS A DENT. REPAIRED PER VT-SAA EA 747-5440-56-A8477
- [SDR UIEA2020021700260](https://openairdocs.org/sdr/UIEA2020021700260), Feb 16, 2020: FEEDER CABLE. CHAFED. FOUND #4 ENG FEEDER CABLE (W282-143-110) CHAFING.(<P>IAW SWPM 20-10-11, 20-10-12, 20-30-13, 20-30-11 REV. 72 AND WDM 24-21-41 REV. 22, REPLACED ENG FEEDER CABLE
- [SDR UIEA2019110105829](https://openairdocs.org/sdr/UIEA2019110105829), Nov 2, 2019: SPLICE PLATE. CORRODED. CORROSION - PLATE, L/H WING L/E TO FRONT SPAR CAVITY AT OLES 1545.50.(<P>REMOVED DAMAGED PART IAW SRM 51-40-02 REV. 43. FABRICATED NEW PART IAW EI NO T2019P57M-
- [SDR UIEA2018121002813](https://openairdocs.org/sdr/UIEA2018121002813), Dec 8, 2018: COMPRESSOR. STALLED. NR 3 ENGINE COMPRESSOR STALLED 2X AFTER TAKE OFF+ WOULD TEMP OUT AT NORMAL THRUST SETTING. AT IDLE WOULD RUN IN NORMAL PARAMETERS. R&R ENG NR 3.
- [SDR DALA2017061204677](https://openairdocs.org/sdr/DALA2017061204677), Jun 9, 2017: ENGINE. FAILED. AIR TURNBACK DURING FLIGHT, THE NUMBER 1 ENGINE STALLED WITH EGT RISE, ENGINE WAS SHUTDOWN. AIRCRAFT RETURNED SAFELY TO DEPARTURE. MAINTENANCE FOUND METAL IN TH

All 12,594: https://openairdocs.org/engine/pratt-whitney-pw4056/reports.md

## STCs that may be installed (OpenAirDocs) (3)

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 SE01543CH](https://openairdocs.org/stc/SE01543CH): Replace Hamilton Sundstrand P/N 778839-13, 778839-14, 778839-19, 778839-20, 778839-37, 778839-38, 816682-1, 840618-2, 880724 carbon bushings with Cook Airtomic P/N AIR22947 Slotted Entry Busing in the High Pressure Shutoff Valve. Cook Airtomic
- [STC SE00053AT-D](https://openairdocs.org/stc/SE00053AT-D): Modification of fan exit guide vane, to line replaceable unit configuration. Chromalloy Gas Turbine Corp
- [STC SE00131LA](https://openairdocs.org/stc/SE00131LA): Modification of the subject engines to incorporate an oil tank reservoir insulation blanket in accordance with Hi Temp Insulation Inc. Drawing List 46M1024-301, Revision N/C, dated December 5, 1995, or later FAA approved revision as an acceptable alternate to Pratt & Whitney part number 50R280-01 or 51R059-01 insulation blankets. Hi Temp Insulation Inc

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