# Pratt & Whitney PW4052

- Type: Engine model (FAA registry)
- Registry code: 51664
- Manufacturer (registry): P & W
- Model: PW4052
- Engine type: Turbo-fan
- Power: 52,200 lb thrust
- Data sheet: [TCDS E24NE](https://openairdocs.org/tcds/E24NE) (OpenAirDocs)
- Holder: Pratt & Whitney Division
- Installed in: 1 registered aircraft
- Page: https://openairdocs.org/engine/pratt-whitney-pw4052

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 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 (1)

- [N670UA](https://openairdocs.org/aircraft/N670UA): [United Airlines Inc](https://openairdocs.org/faa-owner/UNITED%20AIRLINES%20INC), [Chicago, IL](https://openairdocs.org/faa-place/IL/Chicago), built 1999, S/N 29240

## 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 ENG22WA018](https://openairdocs.org/ntsb/ENG22WA018), Apr 8, 2022: Boeing 767-322 (N670UA), Shannon, Irelan, Ireland, incident, minor damage

## FAA accident and incident reports

None matched to aircraft with this engine model.

## Service difficulty reports (1,128, newest 50)

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

- [SDR CALA2025073107128](https://openairdocs.org/sdr/CALA2025073107128), Jul 27, 2025: CHECK VALVE. FAULTED. STARTING ENGINE NR 2 WAS 2 1/2 MINS TO STARTER CUTOUT WITH STRONG EXHAUST ODOR IN CABIN. NR 2 ENGINE OPERATED IAW AMM 71-00-00-712-021-N00. DURING ENGINE OPS, I
- [SDR CALA2022041100937](https://openairdocs.org/sdr/CALA2022041100937), Apr 9, 2022: MAGNETIC PLUG. SEPARATED. LEFT ENGINE LOW OIL PRES SURE AIRBORNE. SECURED ENGINE IAW FLT M AN. SINGLE ENG LANDING. PER VERBAL FROM CREW WINDMILL TIME WAS APPROX 25 MINUTES WITH NO NOTED 
- [SDR IPXA2021013165105](https://openairdocs.org/sdr/IPXA2021013165105), Jan 12, 2021: CASE. CRACKED. INSPECTION TYPE: 2 C NR 1 ENGINE FAN CASE IS CRACKED AT 5 O'CLOCK POSITION JUST AFT OF NOSE COWL ANTI-ICE VALVE. REPAIRED CRACKED NR 1 ENGINE FAN CASE AT 5 O'CL
- [SDR CALA2019122102255](https://openairdocs.org/sdr/CALA2019122102255), Dec 20, 2019: ACTUATOR. MALFUNCTIONED. TURB CASE COOL HPT R EICAS STATUS RIGHT ENGINE HIGH PRESSURE TURBINE (HPT) CASE COOLING ACTUATOR I S STUCK OR REVERTED TO ITS FAIL-SAFE POSITION. FIM TASK REF :
- [SDR CALA2017060201653](https://openairdocs.org/sdr/CALA2017060201653), Jun 1, 2017: WIRE HARNESS. CHAFED. LEFT ENGINE WIRE BUNDLE CHAFED AT PNEUMATIC LINE AFT & INBD OF FWD MOUNT. REMOVED & REPLACED WIRES W002-725/726-YR, & W002-727/725-YR IAW WDN 71-51-14 PG 1.B, B
- [SDR IPXA2017020313658](https://openairdocs.org/sdr/IPXA2017020313658), Jan 10, 2017: INLET. GOUGED. INSPECTION TYPE: 3C, NR 2 ENGINE INLET INNER SKIN HAS GOUGES AT THE 10:30 POSITION. REPAIRED IAW EA 011-5430-01-A6610 REV. I/R AND EO MD11-7110-63154-A.
- [SDR IPXA2017012913391](https://openairdocs.org/sdr/IPXA2017012913391), Jan 9, 2017: THRUST REVERSER. CRACKED. INSPECTION TYPE:3C, NR 1 ENGINE INBD THRUST REVERSER CORE COWL EXTERIOR SKIN IS CRACKED ABOVE AFT UPPER LATCH. REPAIRED THRUST REVERSER COWL IAW SRM 54-00-00 RE
- [SDR CALA2016100700730](https://openairdocs.org/sdr/CALA2016100700730), Oct 7, 2016: COMPRESSOR. DAMAGED. LOW SPEED ABORT DURING TAKEOFF (80 KTS) DUE TO LOUD NOISE ON NR 1 ENGINE. NO VISIBLE EXTERNAL DAMAGE TO FUSELAGE. ALL TIRES, WHEELS AND BRAKES OK. SURGE MESSAGE
- [SDR CALA2015111794838](https://openairdocs.org/sdr/CALA2015111794838), Nov 13, 2015: LIGHT. CORRODED. AS PER CUSTOMER REQUEST, INBOUND EMER LIGHT CHECK. PERFORMED EMER LIGHT CHECK, FOUND EXTERIOR EMER LIGHT L391 INOPERATIVE, LIGHT BASE ASSEMBLY CORRODED. CLEANED
- [SDR CALA2014111092674](https://openairdocs.org/sdr/CALA2014111092674), Nov 8, 2014: COOLING FAN. FAILED. ELEC FUMES IN COCKPIT DIVERTED. ACFT INSPECTIONS HAVE BEEN ACCOMPLISHED IAW REQUIREMENTS OF AMM 05 51 56 FORM 46.6020. INFORMED ODOR LIMITED TO COCKPIT ONLY, TH
- [SDR CALA2014102492560](https://openairdocs.org/sdr/CALA2014102492560), Oct 24, 2014: SKIN. DENTED. SMALL DENT AFT OF RT AFT CARGO DOOR, FWD OF LIGHT. DAMAGED AREA CUT OUT BETWEEN BS 1351 & 1373, STRINGER 28R TO 29R. FABRICATED A REPAIR DOUBLER & TRIPLER & INS
- [SDR CALA2014102492559](https://openairdocs.org/sdr/CALA2014102492559), Oct 22, 2014: ACTUATOR. MALFUNCTIONED. CABIN TEMPS STARTED CLIMBING UP 85, 83, 87 & MUCH HOTTER IN BACK FROM ROW 30. TURNED OFF MASTER TRIM VLV, STILL TEMP HIGH ON ECS PAGE. LT PACK 188 TO 189 DEGREE
- [SDR CALA2014080691760](https://openairdocs.org/sdr/CALA2014080691760), Aug 5, 2014: STRINGER. CRACKED. BULK CARGO PIT BS 1540, STRINGER 39L IS CRACKED AT FASTENER LOCATION. REMOVED DAMAGED STRINGER, FABRICATED A NEW STRINGER SECTION & STRINGER SPLICES INSTALLED I
- [SDR CALA2014031990644](https://openairdocs.org/sdr/CALA2014031990644), Mar 18, 2014: UNKNOWN. MALFUNCTIONED. ON LANDING LT THRUST REVERSER WOULD NOT DEPLOY, LEVER WOULD NOT GO INTO REVERSE. CYCLED SYS. REVERSER LEVER OPERATED NORMALLY. NO FAULTS OR MESSAGES FOUND, CHAN
- [SDR CALA2014031090570](https://openairdocs.org/sdr/CALA2014031090570), Mar 9, 2014: UNKNOWN. MALFUNCTIONED. DIVERSION DUE TO PACK INOPERATIVE.
- [SDR CALA2014030790552](https://openairdocs.org/sdr/CALA2014030790552), Mar 6, 2014: OIL SYSTEM. OVERTEMP. AIR RETURN DUE TO HIGH OIL TEMPERATURE ON LT ENG.
- [SDR CALA2014022790497](https://openairdocs.org/sdr/CALA2014022790497), Feb 25, 2014: ISOLATION VALVE. FAULTED. LT REVERSER DID NOT DEPLOY ON LANDING. LT REVERSER ISOLATION VLV EICAS SHOWED WHEN REVERSE ATTEMPTED.
- [SDR CALA2014021790402](https://openairdocs.org/sdr/CALA2014021790402), Feb 16, 2014: STRUT. LEAKING. RT MAIN STRUT LEAKING IN FLIGHT, FLUID COVERING TIRES & RUNNING OUT OF THE RIMS PUDDLING BELOW TIRES, STRUT IS FLAT.
- [SDR CALA2014010290042](https://openairdocs.org/sdr/CALA2014010290042), Dec 30, 2013: FAIRING. DAMAGED. NR 2 ENG COMPRESSOR INTERMEDIATE CASE FAIRING AT 3 O'CLOCK POS HAS HOLE IN FAIRING. R & R 2 ENG COMPRESSOR CASE FAIRING IAW AMM. NO FURTHER DEFECTS NOTED AT THI
- [SDR CALA2013122793974](https://openairdocs.org/sdr/CALA2013122793974), Dec 26, 2013: EEC. FAULTY. RT ENGINE EGT DROPPED TO ZERO APPROXIMATELY 12 MIN INTO FLT. EGT RETURNED TO NORMAL WITHIN 5 SEC. CONT NXT MR SAMC TEXT STBY EGT ALSO ZERO. ENG OPERATIONS NORMA
- [SDR CALA2013121393677](https://openairdocs.org/sdr/CALA2013121393677), Dec 12, 2013: HYDRAULIC LINE. LEAKING. HYD LEAK FOUND AFT OF NR 2 ENG DRIPPING FROM PYLON. FOUND FROM THRUST REVERSER ISOLATION VLV ASSEMBLY ONE LINE LEAKING IAW 272T0242-100, IPC 78-34-07-01, FIGURE
- [SDR CALA2013120993544](https://openairdocs.org/sdr/CALA2013120993544), Dec 9, 2013: FSEU. FAULTY. TE FLAP DISAGREE TROUBLESHOOT DUE TO RECENT REPORTS OF TE FLAP DISAGREE EICAS MESSAGE. REPLACED FSEU WITH A 285T0049-63 IAW AMM 27-51-01.
- [SDR CALA2013120393424](https://openairdocs.org/sdr/CALA2013120393424), Dec 3, 2013: IDG. CONTAMINATED. IAW CALLOUT LM7758, FOUND LT IDG OIL CONTAMINATED WITH HYD FLUID. REMOVED IDG, FLUSHED SYS IAW. INSTALLED & TESTED NEW IDG IAW 24-11-0. NO OTHER DEFECTS NOTED.
- [SDR CALA2013120393425](https://openairdocs.org/sdr/CALA2013120393425), Dec 3, 2013: SEALANT. MISSING. AT 350 AFTER 2HRS GOT A LOUD SQUEAL FOLLOWED BY A CHOO CHOO SOUND. CABIN ALT 5200 DIFF 8.3 CONTINUED UNTIL CABIN ALT 4000, DIFF 7.3 & NOISE STOP AT 3500, 6.8. N
- [SDR CALA2013120593476](https://openairdocs.org/sdr/CALA2013120593476), Dec 3, 2013: BLADE. NICKED. NR 2 ENG FAN BLADE NICKED. REPAIR BLADE BLEND NR 2 ENG FAN BLADE AMM. BLENDED ADDITIONAL .020.
- [SDR CALA2013120393423](https://openairdocs.org/sdr/CALA2013120393423), Dec 2, 2013: SHUTOFF VALVE. FAULTY. ON TOUCHDOWN RT ENG HPSOV EICAS ILLUMINATED. R & R NR 2 ENG HPSOV, OPERATIONS CHECKED & LEAK CHECKED GOOD.
- [SDR CALA2013120293385](https://openairdocs.org/sdr/CALA2013120293385), Nov 28, 2013: UNKNOWN. MALFUNCTIONED. FWD EQUIPMENT VLV LIGHT ON AFTER LANDING. DEFERRED FWD OVERBOARD VLV IAW MEL 2164W. REMOVED RELAY K1325 & K1326, STORED IN COCKPIT, PLACARD INSTALLED. REPLACED 
- [SDR CALA2013120293365](https://openairdocs.org/sdr/CALA2013120293365), Nov 27, 2013: OXYGEN MASK. LEAKING. CAPTAIN`S O2 MASK DEFECTIVE LEAKS. REPLACED MASK.
- [SDR CALA2013112693273](https://openairdocs.org/sdr/CALA2013112693273), Nov 25, 2013: PANEL. UNSECURE. OVERHEAD O2 PANEL FELL AT ROW 21DEF. SECURED PANEL.
- [SDR CALA2013112793290](https://openairdocs.org/sdr/CALA2013112793290), Nov 25, 2013: UNKNOWN. MALFUNCTIONED. REPEAT IDLE DISAGREE MESSAGE DURING DESCENT. EPR .85L .82R FF 1.5-1.0 N1 43.7-35.2. ACCOMPLISHED FIM 73-21-00 FIG 111. REPLACED AIR GROUND RELAY SYS 1 K141, LT 
- [SDR CALA2013112293196](https://openairdocs.org/sdr/CALA2013112293196), Nov 21, 2013: TRANSCEIVER. FAULTY. WXR SYS STATUS MSG DISPLAYED. REPLACED RT IAW AMM, OPERATIONS CHECKED NORMAL.
- [SDR CALA2013111993031](https://openairdocs.org/sdr/CALA2013111993031), Nov 19, 2013: CIRCUIT CARD. FAULTY. APU BLEED PRESSURE. ACCOMPLISH ITEMS 1,3 & 4 ON CH8365. REPLACED LT N2 SPEED CARD IAW AMM.
- [SDR CALA2013111993055](https://openairdocs.org/sdr/CALA2013111993055), Nov 17, 2013: PRESSURE SWITCH. INOPERATIVE. LEFT AFT FUEL PUMP PRESSURE LIGHT WON'T ILLUMINATE. FUEL PUMP INOPERATIVE. REPLACED PRESSURE SWITCH, OPS CHECKED GOOD.
- [SDR CALA2013111893027](https://openairdocs.org/sdr/CALA2013111893027), Nov 16, 2013: FAN. INOPERATIVE. RT RECIRCULATING FAN INOPERATIVE. ATTEMPTED RESET, NO HELP.
- [SDR CALA2013111893029](https://openairdocs.org/sdr/CALA2013111893029), Nov 16, 2013: UNKNOWN. MALFUNCTIONED. NR 2 ENG START VLV LIGHT REMAINED ILLUMINATED DURING START WHEN START SELECTOR RETURNED TO AUTO. START CONTROL VLV CROSSED WITH ACFT 6668 ENG 2 IAW AMM.
- [SDR CALA2013112093104](https://openairdocs.org/sdr/CALA2013112093104), Nov 16, 2013: GUIDE VANE. OBSTRUCTED. NR 2 ENG SN 717695 WHILE PERFORMING BORESCOPE INSPECTION EC6281-21, WHEN SCOPE INSERTED IN AP 10 PORT DISCOVERED A PIECE OF DEBRIS CAUGHT ON THE GUIDE VANES FWD
- [SDR CALA2013111592965](https://openairdocs.org/sdr/CALA2013111592965), Nov 15, 2013: GUIDE VANE. OBSTRUCTED. NR 2 ENG SN 717695 WHILE PERFORMING BORESCOPE INSPECTION EC6281-21 WHEN I INSERTED SCOPE IN AP-10 PORT I FOUND A PIECE OF DEBRIS CAUGHT ON THE GUIDE VANES FWD O
- [SDR CALA2013112093132](https://openairdocs.org/sdr/CALA2013112093132), Nov 15, 2013: TUBE. CHAFED. FOUND TUBE CHAFFING ON PROX SENSOR BRACKET BETWEEN NR 2 & NR 3 LATCHES FOR RT OFF WING DOOR SLIDE PCN 160-1065. R & R THE TUBE IN BETWEEN THE NR 2 & NR 3 LATCHE
- [SDR CALA2013111893006](https://openairdocs.org/sdr/CALA2013111893006), Nov 14, 2013: TURBINE. OBSTRUCTED. NR 2 ENG SN 717695 WHILE PERFORMING BORESCOPE INSPECTION EC6281-21 WHEN INSERTED SCOPE IN AP-10 PORT FOUND A PIECE OF DEBRIS CAUGHT ON THE GUIDE VANES FWD OF TU
- [SDR CALA2013111292841](https://openairdocs.org/sdr/CALA2013111292841), Nov 11, 2013: FITTING. LEAKING. FUEL LEAKING OUT OF LOWER PF FITTING ON FMU ON NR 2 ENG, WET MOTORED ENG. WHEN SHUT OFF FUEL, FUEL WAS FOUND ON PARTING SURFACE BETWEEN FMU & FUEL PUMP, RUNNING
- [SDR CALA2013111292842](https://openairdocs.org/sdr/CALA2013111292842), Nov 11, 2013: OXYGEN MASK. LEAKING. SELF INFLATING HARNESS ON FIRST OFFICER'S OXYGEN MASK HAS A LEAK. WILL NOT INFLATE PROPERLY. REPLACED FIRST OFFICER'S OXYGEN MASK IAW AMM, OPERATIONS CHECKED FU
- [SDR CALA2013102392309](https://openairdocs.org/sdr/CALA2013102392309), Oct 23, 2013: PROBE. OBSTRUCTED. CAPT PITOT ISSUE, RTFL CREW REPORT CAPT AIRSPEED 23 KNOT DIFFERENCE BETWEEN FIRST OFFICERS & STANDBY. CAPT SELECTED ALTN AIR DATA & AIRSPEEDS NOW AGREE. TROUBLE
- [SDR CALA2013102492369](https://openairdocs.org/sdr/CALA2013102492369), Oct 23, 2013: BLADE. NICKED. NR1 ENG BLADE 18 HAS NICK ON THE LE 20.25" FROM ROOT TO A DEPTH 1.25MM. BLADE DAMAGE BLENDED OUT IAW MM.
- [SDR CALA2013103092519](https://openairdocs.org/sdr/CALA2013103092519), Oct 23, 2013: DRIVE SHAFT. BROKEN. FWD CARGO DOOR DRIVE SHAFT BROKEN IN TWO. ACCOMPLISHED REPLACEMENT OF FWD CARGO DOOR DRIVE SHAFT MECHANISM, OPERATIONS CHECKED GOOD.
- [SDR CALA2013101592071](https://openairdocs.org/sdr/CALA2013101592071), Oct 14, 2013: CONTROLLER. FAULTY. AUTO INOPERATIVE DISPLAYED ON OVERHEAD PANEL FOR CABIN ALTITUDE CONTROL IN AUTO 1 & AUTO 2. R & R NR 2 AUTO PRESSURE CONTROLLER IAW AMM 21-31-02. INSTALLATION T
- [SDR CALA2013101692127](https://openairdocs.org/sdr/CALA2013101692127), Oct 13, 2013: MANIFOLD. LEAKING. ENG NR 2 OTBD THRUST REVERSER OPEN ACTUATOR MANIFOLD LEAKING. R & R ENG NR 2 OTBD THRUST REVERSER OPEN ACTUATOR MANIFOLD IAW UAL AMM 78-31-17. LEAK CHECKED GOOD
- [SDR CALA2013100991882](https://openairdocs.org/sdr/CALA2013100991882), Oct 8, 2013: OXYGEN SYSTEM. LOW PRESSURE. CREW OXYGEN LOW INDICATING 980 PSI. SERVICED CREW O2 TO 1800 PSI IAW AMM 12-15-08 OK TO CONTINUE, NO LEAKS NOTED.
- [SDR CALA2013100791812](https://openairdocs.org/sdr/CALA2013100791812), Oct 6, 2013: INDICATION SYS. MALFUNCTIONED. RT CRT TANK FUEL BOOST PUMP WITH SWITCH IN OFF POSITION, NO LOW PRESS LIGHT & ADVISORY EICAS MESSAGE. CONFIRMED & VERIFIED RT CRT TANK FUEL BOOST PUMP INOPERATI
- [SDR CALA2013100791798](https://openairdocs.org/sdr/CALA2013100791798), Oct 5, 2013: SHIELD. DAMAGED. DAMAGE TO LT MLG BOOGIE BEAM SHIELD. PERFORMED DETAIL INSPECTION NO FURTHER DEFECT FOUND. REMOVED BOOGIE BEAM SHIELD IAW CDL 32A. REPLACED SHIELD.
- [SDR CALA2013100791773](https://openairdocs.org/sdr/CALA2013100791773), Oct 4, 2013: DISPLAY. DIRTY. UPPER EICAS DISPLAY ALL BLUE INSTEAD OF WHITE. SUSPECT DISPLAY FAILING. UPPER EICAS DU INLET SCREENS CLEANED. DU, EICAS COMPUTERS & SYMBOL GENERATORS RERACK T. 

All 1,128: https://openairdocs.org/engine/pratt-whitney-pw4052/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 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

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