# Service difficulty reports: Pratt & Whitney JT9D-7AH

A list on [Pratt & Whitney JT9D-7AH](https://openairdocs.org/engine/pratt-whitney-jt9d-7ah.md).

Newest first. General aviation reporting is voluntary.

- [SDR UPS03440259](https://openairdocs.org/sdr/UPS03440259.md): Compressor · stalled · Mar 6, 2003 · N682UP · Boeing 747121 · Powerplant System
  > AIR TURNBACK NR 3 ENG COMPRESSOR STALL IN CLIMB AT FL190 PAX REPORTED GLOW IN N1 SECTION. EGT RISING, ENG SHUTDOWN. REMOVED AND REPLACED NR ENGINE S/N OFF P685985CN, INSTALLED S/N P662942 PER TC 5000, 5001, 5016 & MM 71-00-00 OPS & LEAK CHECK GOOD. OK FOR C
- [SDR UPS01437264](https://openairdocs.org/sdr/UPS01437264.md): Engine · failed · Nov 10, 2001 · N681UP · Boeing 747121 · Engine (Turbine/Turboprop)
  > INSPECTION TYPE:N/A DURING CLIMBOUT, THE NR 4 ENG SURGED LOUDLY AND VIOLENTLY MULTIPLY TIMES WITH VISIBLE FLAMES SHOOTING OUT OF THE INLET. YAW ASSOCIATED WITH SURGES. OIL TEMP READ OVER 135 EGT 946 OIL QUANTITY 5.3, N2, 18 PERCENT. RAN CHECKLISTS AT TOD, H
- [SDR EIAA2000049](https://openairdocs.org/sdr/EIAA2000049.md): O-Ring · damaged · Sep 20, 2000 · N477EV · Boeing 747SR46 · Turbine Engine Oil System
  > KOAK - FLT EIA 2955 - NR 3 ENGINE OIL QUANTITY DROPPED TO 1.5 GALLONS, PRESSURE AT 38 PSI. SHUT DOWN ENGINE AND RETURNED TO OAK. THERMAL DISCHARGE OF 6 TIRES AFTER APPROXIMATELY 30 MINUTES. FOUND NR 3 ENGINE OIL CAP SECURE, BUT PORTION OF O-RING SEPARATED.
- [SDR UPS00432918](https://openairdocs.org/sdr/UPS00432918.md): Oil Filter · contaminated · Jun 19, 2000 · N676UP · Boeing 747123F · Turbine Engine Oil System
  > INSPECTION TYPE:SP, NR 2 OIL FILTER BYPASS LIGHT ILLUMINATED IN FLIGHT. SHUTDOWN NR 2 ENGINE IAW CHECKLIST. OIL PRESSURE REMAINED ABOVE 5 PSI. ENTIRE TIME ENGINE WINDMILLED FOR 40 MINUTES AFTER SHUTDOWN. CHECKED CHIP DETECTORS, NO DEFECT. DRAINED OIL FROM
- [SDR UPS00432931](https://openairdocs.org/sdr/UPS00432931.md): Engine · malfunctioned · Jun 19, 2000 · N676UP · Boeing 747123F · Engine (Turbine/Turboprop)
  > INSPECTION TYPE:N/A, DURING DESCENT WITH NR 4 ENGINE AT IDLE THRUST EPR 1.17, NO-88.0 AND FUEL FLOW WAS 10,000. ACCOMPLISHED INFLIGHT ENGINE SHUTDOWN CHECKLIST. REMOVED AND REPLACED NR 4 ENGINE IAW TASK CARD 5000, OPS AND LEAK CHECK GOOD.
- [SDR EIA990286](https://openairdocs.org/sdr/EIA990286.md): Engine · bird strike · Oct 15, 1999 · N472EV · Boeing 747131 · Engine (Turbine/Turboprop)
  > HNL - NR 1 ENGINE 'N1' INDICATOR HAD INTERMITTENT FLUCT PLUS/MINUS 5 PERCENT ON CLIMB-OUT. FLUCT AT CRUISE PEGGED OVERSPEED INDICE AT 112 PERCENT. RESET INDICE AND INDICATOR OPERATED NORMALLY FOR REMAINDER OF FLT. ON POST FLT, FOUND 'C1' DISC AND '1'STATOR'
- [SDR 99ZZZX4602](https://openairdocs.org/sdr/99ZZZX4602.md): Line · cracked · Sep 30, 1999 · N854FT · Boeing 747122 · Engine Fuel Distribution
  > ENGINE EXPERIENCED WHAT APPEARED TO BE A STALL FOLLOWED BY A FIRE WARNING. ENGINE WAS SHUT DOWN AND AN AIR TURN-BACK ACCOMPLISHED. CORE COWL DAMAGE WAS OBSERVED IMMEDIATELY AFTER LANDING. SUBSEQUENT INVESTIATION IDENTIFIED A CRACKED FUEL HYDRAULIC LINE. THE
- [SDR 99ZZZX4184](https://openairdocs.org/sdr/99ZZZX4184.md): Blade · failed · Jun 1, 1999 · Boeing 747* · Turbine Section
  > ENGINE REMOVED POS 2 AT ANCHORAGE, AK 6-1-98 DUE LOW PRESSURE TURBINE FAILURE. ENGINE RECEIVED FOR MAINTENANCE 1-11-99. DISASSEMBLY INSPECTION REVEALED AN APPARENT 5TH STAGE TURBINE BLADE FAILURE. THE FAILED BLADES WILL BE FORWARDED TO PRATT & WHITNEY FOR A
- [SDR EIA990116](https://openairdocs.org/sdr/EIA990116.md): Blade · damaged · May 7, 1999 · N478EV · Boeing 747SR46 · Turbine Engine Compressor Section
  > BIRDSTRIKE ON THE NR 3 ENGINE. UPON INSPECTION FOUND DAMAGE TO NR 33 AND NR 34 BLADES. REPLACED DAMAGED BLADES PER EIA MAINTENANCE 'F' CARD NR F7208. OPS CHECKED PER 71-00-00. (M)
- [SDR AU990420021](https://openairdocs.org/sdr/AU990420021.md): Spacer · unapproved part · Apr 5, 1999 · Boeing 747* · Turbine Engine Compressor Section
  > (AU) DURING INSPECTION A SPACER SUSPECTED OF BEING AN UNAPPROVED PART, WAS FOUND ON A JT9D ENGINE BELLCRANK. THE ENGINE HAD BEEN INDUCTED INTO THE SHOP FOR REFURBISHMENT. THIS PART IS CRITICAL TO ENGINE OPERATION BECAUSE IT IS HOLDING A ROD ATTACHED TO THE I
- [SDR EIAA990005](https://openairdocs.org/sdr/EIAA990005.md): Engine · malfunctioned · Mar 8, 1999 · N477EV · Boeing 747SR46 · Engine (Turbine/Turboprop)
  > JFK - DURING FLIGHT FROM LFPG TO KJFK, FLIGHT CREW REPORTED OIL LOSS FROM THE NR 3 ENGINE. CREW PERFORMED A PRECAUTIONARY SHUTDOWN OF THE SUBJECT ENGINE AND CONTINUED FLIGHT. (M)
- [SDR CA980720019](https://openairdocs.org/sdr/CA980720019.md): Engine · smoke · Jun 29, 1998 · Engine (Turbine/Turboprop)
  > (CAN) ON TAKEOFF, THE FLIGHT CREW INITIATED A TURNBACK DUE TO SMELL OF FUMES AND SMOKE SEEN ON THE UPPER DECK. POST-FLIGHT THE LINE CREW NOTICED OIL COMING FROM THE WEEP TUBES AND THE BLEED VALVE LOCATIONS. THE ENGINE WAS REMOVED FROM SERVICE FOR FURTHER EVA
- [SDR EIAA98055](https://openairdocs.org/sdr/EIAA98055.md): Compressor · stalled · Feb 15, 1998 · N479EV · Boeing 747132 · Turbine Engine Compressor Section
  > NR 2 ENGINE HAD COMPRESSOR STALLED AT FL 390. CHECKED ENGINE PARAMETERS, SHUTDOWN ENGINE. DECLARED AN EMERGENCY TO GET DESCENT CLEARANCE TO FL 310. LANDED YSSY NO PROBLEMS. (M)
- [SDR TWAA9801304](https://openairdocs.org/sdr/TWAA9801304.md): Oil Pump · failed · Jan 22, 1998 · N93108 · Boeing 747131 · Turbine Engine Oil System
  > SNN - FLT 883 - ON DESCENT 33,000 FT, OIL PRESS IND FLUX DOWN TO ZERO PSI WITH THROTTLE AT IDLE. WITH ENG AT IDLE ON FINAL OIL PRESS LIGHT ON. ENGINE SHUT DOWN AFTER LANDING. NR 1 ENGINE, REPLACED OIL PUMP. (M)
- [SDR TWAA9800901](https://openairdocs.org/sdr/TWAA9800901.md): Gear Box · failed · Jan 17, 1998 · N53110 · Boeing 747131 · Turbine Engine Accessory Drive
  > FCO - FLT 883 - DURING CRUISE, NR 2 ENGINE OIL PRESS SLOWLY WENT TO ZERO. SHUT DOWN THE ENGINE. REPLACED OIL PUMP MGR P/N 804659-1 AND GEAR BOX MFG P/N 746450-001. (M)
- [SDR TWAA9714904](https://openairdocs.org/sdr/TWAA9714904.md): Seal · worn · Dec 17, 1997 · N53110 · Boeing 747131 · Turbine Engine Compressor Section
  > LAX - FLT 1 - DURING CRUISE, EXPERIENCED A LOSS OF OIL IN NR 2 ENGINE. REPLACED NR 3 BEARING SEAL MFG P/N 635496CL4 AND COUPLING MFG P/N 735138. (M)
- [SDR UPS97425271](https://openairdocs.org/sdr/UPS97425271.md): Gauge · malfunctioned · Nov 26, 1997 · N673UP · Boeing 747123F · Engine Oil Quantity
  > NR 3 ENG OIL QTY 5.3 PRIOR TO START. 4.3 GAL ON POWER PUSH FOR T/O; DURING CLIMB TO A 26000 LEVEL OFF OIL QTY OBSERVED TO SLOWLY DROP TO 2.6. WHEN POWER REDUCED OIL STOPPED AT 2.6 UNTIL SHUT DOWN. OIL QTY THEN CLIMBED TO 4.5 AFTER SHUTDOWN 2 MIN. RESET C/
- [SDR P5CA9701815](https://openairdocs.org/sdr/P5CA9701815.md): Seal · misinstalled · Nov 3, 1997 · N857FT · Boeing 747132 · Turbine Engine Oil System
  > ENGINE SHUT DOWN AT 21,000 FEET DUE TO LOSS OF NR 1 ENGINE OIL QUANTITY AND LOSS OF OIL PRESSURE WITH INCREASE IN OIL TEMPERATURE OF APPROXIMATELY 25 DEGREES. FOUND NR 1 ENGINE DRIVEN PUMP DEACTIVATED WITH KIT. DRIVE SEAL LINE IN CASE NOT PROPERLY REMOVED AN
- [SDR P5CA9701559](https://openairdocs.org/sdr/P5CA9701559.md): Compressor · stalled · Sep 14, 1997 · N859FT · Boeing 747123 · Turbine Engine Compressor Section
  > ENGINE COMPRESSOR STALL OCCURED DURING TAKEOFF WITH MOMENTARY DIRECTIONAL INSTABILITY, NO UNUSUAL ENGINE INDICATIONS OBSERVED. ABORTED TAKEOFF AND RETURNED TO BLOCKS. PERFORMED VISUAL INSPECTION PER BAC MM 71-00-43 AND BORESCOPE INSPECTION OF ENGINE COMPRESS
- [SDR P5CA9701453](https://openairdocs.org/sdr/P5CA9701453.md): Turbine Case · cracked · Aug 26, 1997 · N855FT · Boeing 747124 · Turbine Section
  > CRACKED R RAIL NR 4 ENGINE AT 300Ý POSITION, RADIUS CRACK TRAVELING TO OUTSIDE DIAMETER. REPAIRED PER PW M/M 72-53-01 REPAIR NR 14.
- [SDR TWAA9798003](https://openairdocs.org/sdr/TWAA9798003.md): Engine · failed · Aug 22, 1997 · N93108 · Boeing 747131 · Engine (Turbine/Turboprop)
  > STL - FLT 1 - DURING CLIMB, THE NR 3 ENGINE LOST BOTH OIL QTY AND PRESSURE. SHUT DOWN ENGINE IN FLIGHT. CHANGED ENGINE. (M)
- [SDR P5CA9701420](https://openairdocs.org/sdr/P5CA9701420.md): R-Rail · cracked · Aug 9, 1997 · N859FT · Boeing 747123 · Turbine Section
  > NR 3 ENGINE 'R' RAIL CRACKED AT 9 O'CLOCK BEHIND LWR PRECOOLER EXHAUST PORT SKIRT. WELDED AND STRESS RELIEVED IAW PWA 72-53-01.
- [SDR CA970624020](https://openairdocs.org/sdr/CA970624020.md): Hp Comp Disc · cracked · Jun 4, 1997 · Turbine Engine Compressor Section
  > (CAN) DURING DISASSEMBLY AND INSPECTION OF THE HIGH PRESSURE COMPRESSOR A CRACK, BEYOND ACCEPTABLE LIMITS, WAS FOUND IN THE BLADE SLOT AREA OF THE 9TH STAGE DISC. THE 9TH STAGE DISC WAS SCRAPPED AND SENT TO THE MATERIAL REVIEW DEPARTMENT FOR EVALUATION.
- [SDR CA970624021](https://openairdocs.org/sdr/CA970624021.md): Gasket Assembly · pinched · Jun 4, 1997 · Turbine Engine Combustion Section
  > (CAN) DURING REMOVAL AND INSPECTION OF THE DIFFUSER CASE, IN THE #3 BEARING COMPARTMENT, A GASKET ASSEMBLY OF SPIRAL WOUND WAS FOUND PINCHED ALLOWING HOT AIR TO ENTER THE COMPARTMENT. ACCUMULATION OF SOFT COKING ON THE RIGHT HAND SIDE OF THE FRONT SUPPORT RESU
- [SDR P5CA9700468](https://openairdocs.org/sdr/P5CA9700468.md): Flange · cracked · Mar 28, 1997 · N859FT · Boeing 747123 · Turbine Section
  > CRACK IN 'R' FLANGE AT 9 O'CLOCK POSITION NR 3 ENG. WELDED IAW P/W 72-53-01 USING GREEK ASCOLOY TIG ROD AND DYE CHECK WELD PER SOPM 20-20-02, NO CRACK. ALSO, STRESS RELIEVED IAW 72-53-01.
- [SDR EIAA9682](https://openairdocs.org/sdr/EIAA9682.md): O-Ring · cut · Nov 2, 1996 · N479EV · Boeing 747132 · Turbine Engine Oil System
  > SBGR - DURING CLIMB, NR 2 ENGINE OIL QTY SLOWLY DECREASED TO ZERO, ACCOMPANIED WITH FLUCTUATING OIL PRESSURE. IN FLIGHT ENGINE FAILURE AND SHUTDOWN CHECKLIST COMPLETED TOTAL WINDMILLING TIME 3 PLUS 10, MINIMUM OIL PRESSURE WAS 16 PSI STEADY. IN FLIGHT SHUTDO
- [SDR P5CA9600848](https://openairdocs.org/sdr/P5CA9600848.md): Turbine Case · cracked · Oct 25, 1996 · N858FT · Boeing 747123 · Turbine Section
  > CRACKED S-RAIL NR 2 ENGINE, TWO PLACES 5 O'CLOCK AND 7 O'CLOCK. WELDED, STRESS RELIEVED AND FLAP PEENED PER PRATT AND WHITNEY MAINTENANCE MANUAL 72-53-01.
- [SDR EIAA9646](https://openairdocs.org/sdr/EIAA9646.md): Evc · malfunctioned · Oct 21, 1996 · N480EV · Boeing 747121 · Compressor Bleed Control
  > DURING APPROACH, NR 1 ENGINE FAILED TO RESPOND TO THRUST LEVER MOVEMENTS. OIL PRESSURE LIGHT CAME ON. ACCOMPLISHED ENGINE SHUTDOWN PROCEDURE. ENGINE RUN UP, HUNG AT 24 PERCENT. CHECKED EVC AND FOUND ACTUATOR EXTENDED. REPLACED EVC CONTROL PER MM 75-31-01.
- [SDR 96ZZZM1218](https://openairdocs.org/sdr/96ZZZM1218.md): Engine · failed · Jul 7, 1996 · N134TW · Boeing 747156 · Engine (Turbine/Turboprop)
  > HNL - DURING CLIMB NR 2 ENGINE, S/N 4115, FIRE WARNING ILLUMINATED. ENGINE WAS SHUTDOWN IN FLIGHT AND AIRCRAFT RETURNED TO HNL WHERE ENGINE WAS CHANGED. ENGINE TOTAL TIME 78,187, CYCLES 14,251.
- [SDR TWRA9626](https://openairdocs.org/sdr/TWRA9626.md): Turbine · failed · May 10, 1996 · N604FF · Boeing 747121 · Turbine Section
  > AT 13,000 FEET AFTER TAKEOFF LOUD BOOM WAS HEARD AND CONFIRMED ENGINE ON NR 3 ENGINE. AFTER RETURN TO JED INITIAL INSPECTION FOUND METAL IN TAILPIPE. BORESCOPE INSPECTION FOUND SECOND STAGE TURBINE FAILURE. ENGINE TO BE REPLACED. (M)
- [SDR 95ZZZM749](https://openairdocs.org/sdr/95ZZZM749.md): Turbine Blades · damaged · Nov 10, 1995 · N93104 · Boeing 747131 · Turbine Section
  > HNL - DURING CLIMB, SHUT DOWN NR 1 ENGINE, S/N 4165, DUE TO COMPRESSOR STALL AND RISING EGT. FOUND METAL PARTICLES IN TAILPIPE AND TURBINE BLADE DAMAGE. REPLACED ENGINE AND ENGINE OPERATION CHECKED NORMAL.
- [SDR 95ZZZM673](https://openairdocs.org/sdr/95ZZZM673.md): Engine · oil leak · Oct 30, 1995 · N53110 · Boeing 747131 · Turbine Engine Oil System
  > JFK - DURING CRUISE SHUT DOWN NR 4 ENGINE, S/N 4199, DUE TO DECREASING OIL QUANTITY. FOUND OIL LEAKING IN ENGINE CORE. REPLACED NR 4 ENGINE AND ENGINE OPERATION CHECKED NORMAL.
- [SDR 97ZZZM86](https://openairdocs.org/sdr/97ZZZM86.md): Breather · oil leak · Oct 30, 1995 · N53110 · Boeing 747131 · Turbine Engine Oil System
  > JFK - DURING CRUISE SHUT DOWN NR 4 ENGINE, S/N 4199, DUE TO DECREASING OIL QTY. FOUND OIL LEAKING IN ENGINE CORE. REPLACED NR 4 ENGINE AND ENGINE OPERATION CHECKED NORMAL. INVESTIGATION REVEALED NR 1 AND NR 2 BEARING BREATHER MANIFOLD BELLOWS PROTECTIVE SHI
- [SDR TWRA9557](https://openairdocs.org/sdr/TWRA9557.md): Eng Vane Control · failed · Oct 29, 1995 · N604FF · Boeing 747121 · Compressor Bleed Control
  > NR 1 ENGINE STALLED AT TOP OF DESCENT. EGT MAX 778 DEGREES, ENGINE SHUT-DOWN. RE-LIT NORMAL IN DESCENT AT FLIGHT LEVEL 280. ENGINE OPS NORMAL REMAINDER OF FLIGHT. REMOVED AND REPLACED EVC. OPS CHECK OK. (X)
- [SDR 95ZZZM678](https://openairdocs.org/sdr/95ZZZM678.md): Fuel Pump · malfunctioned · Oct 22, 1995 · N53116 · Boeing 747131 · Engine Fuel Pump
  > CDG - DURING CLIMB NR 2 ENGINE, S/N 4159, SPOOLED DOWN. SHUTDOWN ENGINE PER STANDARD PROCEDURES. FOUND ENGINE FUEL PUMP, MFG P/N 705301-32, MALFUNCTIONING. REPLACED ENGINE FUEL PUMP. ENGINE OPERATION CHECK NORMAL.
- [SDR 95ZZZX3402](https://openairdocs.org/sdr/95ZZZX3402.md): Tube · leaking · Jun 20, 1995 · N134TW · Boeing 747156 · Turbine Engine Oil System
  > LGW - FLT 721 - DURING CLIMB, SHUT DOWN NR 4 ENGINE, SN 4103, DUE TO OIL FILTER BYPASS LIGHT ILLUMINATING. FOUND OIL AND OIL FILTER HIGHLY CARBONATED. REPLACED ENGINE, SN 4103. ENGINE OPERATION CHECKED NORMAL. CHECK C-1 - 11-14-94 - JFK. SUPPLEMENTAL DATA
- [SDR 95ZZZX2351](https://openairdocs.org/sdr/95ZZZX2351.md): Fuel Pump · failed · Apr 27, 1995 · N93108 · Boeing 747131 · Engine Fuel Pump
  > LAX - FLT 841 - ON APPROACH, NR 1 ENGINE SHUT DOWN ON OWN ACCORD. REPLACED FUEL PUMP, MFG PN 373401-26 AND JFC, MFG PN 747999-5. OP CHECKS NORMAL. CHECK C-2 - 1-29-95 - MCI.
- [SDR 95ZZZX2354](https://openairdocs.org/sdr/95ZZZX2354.md): Fuel Pump · failed · Apr 27, 1995 · N93108 · Boeing 747131 · Engine Fuel Pump
  > LAX - FLT 841 - DURING APPROACH, NR 1 ENGINE, SN 4162, SPUN DOWN. SHUT DOWN ENGINE. REPLACED NR 1 ENGINE FUEL PUMP, MFG PN 373401-26, AND FUEL CONTROL, MFG PN 747999-5. ENGINE GROUND RUN UP OPERATION CHECKED NORMAL. CHECK C-2 - 1-29-95 - MCI.
- [SDR 95ZZZX2355](https://openairdocs.org/sdr/95ZZZX2355.md): Fuel Control · failed · Apr 27, 1995 · N93108 · Boeing 747131 · Fuel Control/Turbine Engines
  > LAX - FLT 841 - DURING APPROACH, NR 1 ENGINE, SN 4162, SPUN DOWN. SHUT DOWN ENGINE. REPLACED NR 1 ENGINE FUEL PUMP, MFG PN 373401-26, AND FUEL CONTROL, MFG PN 747999-5. ENGINE GROUND RUN UP OPERATION CHECKED NORMAL. CHECK C-2 - 1-29-95 - MCI.
- [SDR TWRA9516](https://openairdocs.org/sdr/TWRA9516.md): Engine · malfunctioned · Mar 12, 1995 · N604FF · Boeing 747121 · Engine (Turbine/Turboprop)
  > ABORTED TAKEOFF DUE TO NR 2 ENGINE EXPERIENCED A DROP IN EPR AND N1 ALONG WITH A INCREASE IN EGT. FOLLOWING TROUBLESHOOTING, MAINTENANCE ELECTED TO FERRY AIRCRAFT TO JFK FOR REPAIR. (W)

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
WHERE engine_model_key = 'JT9D7AH'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/engine/pratt-whitney-jt9d-7ah/reports

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