# Service difficulty reports: Pratt & Whitney JT9D-20J A list on [Pratt & Whitney JT9D-20J](https://openairdocs.org/engine/pratt-whitney-jt9d-20j.md). Newest first. General aviation reporting is voluntary. Page 1 of 2 · 76 reports - [SDR 0101331147](https://openairdocs.org/sdr/0101331147.md): Clamp · failed · Apr 4, 2001 · N147US · Doug DC1040 · Pneumatic Distribution System > WHILE IN CRUISE AT FL260, THE NR 2 ENGINE FIRE WARNING ACTIVATED. THE ENGINE WAS SECURED PER COM AND ONE FIRE BOTTLE WAS DISCHARGED. AN EMERGENCY WAS DECLARED WITH THE FLIGHT LANDING WITHOUT INCIDENT. MAINTENANCE REPLACED THE TWO PNEUMATIC DUCT CLAMPS WHICH - [SDR 0100571158](https://openairdocs.org/sdr/0100571158.md): Engine · leaking · Feb 16, 2001 · N158US · Doug DC1040 · Turbine Engine Oil System > DURING CLIMB AFTER TAKEOFF, THE CREW REPORTED SMOKE ENTERING THE CABIN FROM A PNEUMATIC SOURCE. THE FLIGHT RETURNED TO LAX AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND DETERMINED THE NR 1 ENGINE TO BE LEAKING OIL AND CONTAMINATING THE - [SDR 9905091156](https://openairdocs.org/sdr/9905091156.md): Engine · malfunctioned · Nov 26, 1999 · N156US · Doug DC1040 · Engine (Turbine/Turboprop) > DURING DESCENT AT 12,000 FEET WHILE IN TURBULENCE, THE NR 2 ENGINE FLAMED OUT. THE RESTART ATTEMPT WAS SUCCESSFUL WITH ENGINE OPERATION NORMAL FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE INSPECTED THE ENGINE PER THE TAFI MANUAL WITH NO DEFECTS NOTED. ADDITI - [SDR 9903391158](https://openairdocs.org/sdr/9903391158.md): Power Lever · out of adjust · Aug 9, 1999 · N158US · Doug DC1040 · Power Lever > AFTER TOUCHDOWN WHEN REVERSE THRUST WAS APPLIED, THE NR 3 ENGINE DID NOT ACCELERATE. THE NR 2 ENGINE DEVELOPED MAXIMUM REVERSE THRUST WHILE THE NR 1 THRUST REVERSER WAS INOPERATIVE ON MEL. MAXIMUM BRAKING WAS APPLIED BUT THE AIRCRAFT DID NOT STOP UNTIL APPRO - [SDR 9900501149](https://openairdocs.org/sdr/9900501149.md): Duct · failed · Feb 11, 1999 · N149US · Doug DC1040 · Pneumatic Distribution System > DURING INITIAL CLIMB AFTER TAKEOFF AT APPROXIMATELY 2000 FT MSL, THE NR 2 ENGINE FIRE WARNING ANNUNCIATED. THE ENGINE WAS SHUT DOWN PER THE FIRE WARNING CHECK LIST AND THE NR 1 FIRE BOTTLE WAS DISCHARGED. THE FIRE WARNING CEASED AFTER THE BOTTLE WAS DISCHARG - [SDR 9809561141](https://openairdocs.org/sdr/9809561141.md): Fuel Line · cracked · Jun 16, 1998 · N141US · Doug DC1040 · Engine Fuel Distribution > WHILE AT CRUISE FL330, THE NR 2 ENGINE COMPRESSOR STALLED. ALL NR 2 PARAMETERS ROLLED BACK TO FLIGHT IDLE. THE ENGINE DID NOT RESPOND TO POWER LEVER INPUTS AND WAS SHUT DOWN. THE AIRCRAFT RETURNED TO BOS AND LANDED WITHOUT INCIDENT. THE CREW DID ATTEMPT ON - [SDR 9809131149](https://openairdocs.org/sdr/9809131149.md): Engine · flamed out · May 11, 1998 · N149US · Doug DC1040 · Engine (Turbine/Turboprop) > WHILE IN CRUISE FLIGHT AT FL340, THE AIRCRAFT ENCOUNTERED MODERATE TURBULENCE, POSSIBLY WAKE TURBULENCE, AND THE NR 1 ENGINE FLAMED OUT. THE ENGINE WAS SECURED PER ENGINE FAILURE CHECKLIST AND A DESCENT FROM FL340 WAS STARTED. AT FL300, A RESTART WAS ACCOMPL - [SDR 9808921141](https://openairdocs.org/sdr/9808921141.md): Compressor · stalled · May 7, 1998 · N141US · Doug DC1040 · Turbine Engine Compressor Section > DURING THE LANDING ROLLOUT, THE NR 3 ENGINE COMPRESSOR STALLED WHILE IN REVERSE THRUST. THE EGT REACHED 970C BEFORE THE ENGINE WAS SHUT DOWN. MAINTENANCE PERFORMED A BORESCOPE INSPECTION AND FOUND DAMAGE TO THE HIGH PRESSURE COMPRESSOR. THE AIRCRAFT WAS REMO - [SDR 9807741160](https://openairdocs.org/sdr/9807741160.md): Engine · flamed out · Apr 29, 1998 · N160US · Doug DC1040 · Engine (Turbine/Turboprop) > AT TOP OF DESCENT FL330, THE NR 3 ENGINE FLAMED OUT. THE ENGINE WAS SUCCESSFULLY RESTARTED ON THE SECOND ATTEMPT. THE DESCENT AND LANDING WAS WITHOUT INCIDENT. MAINTENANCE TROUBLESHOT THE ENGINE PER TAFI 71-00-00 AND PERFORMED A HIGH POWER ENGINE RUN, ALL W - [SDR 9806911148](https://openairdocs.org/sdr/9806911148.md): Tr Unit · malfunctioned · Apr 16, 1998 · N148US · Doug DC1040 · Engine Thrust Reverser > DURING TAKEOFF ROLL, THE NR 2 ENGINE REVERSER UNLOCKED LIGHT ILLUMINATED. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE PLACED THE REVERSER ON MEL 78-1A. - [SDR 9806751144](https://openairdocs.org/sdr/9806751144.md): Compressor · stalled · Apr 15, 1998 · N144JC · Doug DC1040 · Turbine Engine Compressor Section > AFTER LANDING WHILE CREW WAS ATTEMPTING TO RESTOW THE NR 3 ENGINE THRUST REVERSER, THE NR 3 ENGINE COMPRESSOR STALLED. EGT CLIMBED TO 820C AND THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE PER THE TAFI MANUAL WITH NO DEFECTS NOTED. THE ENGINE WA - [SDR 9806411148](https://openairdocs.org/sdr/9806411148.md): Tr Unit · malfunctioned · Apr 9, 1998 · N148US · Doug DC1040 · Engine Thrust Reverser > WHEN ENGINE POWER WAS ADVANCED TO THE TAKEOFF SETTING, THE NR 2 ENGINE THRUST REVERESER UNLOCK INDICATION ILLUMINATED. THE TAKEOFF WAS ABORTED AT APPROXIMATELY 30 KTS AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE PLACED THE REVERSER ON MEL 78-1A. - [SDR 9805721154](https://openairdocs.org/sdr/9805721154.md): Compressor · stalled · Mar 30, 1998 · N154US · Doug DC1040 · Turbine Engine Compressor Section > DURING LANDING ROLLOUT AT APPROXIMATELY 80 KNOTS WHILE IN REVERSE THRUST, THE NR 2 ENGINE COMPRESSOR STALLED. THE ENGINE WAS SHUT DOWN AT APPROXIMATELY 40 KNOTS. THE EGT WAS AT MAXIMUM INDICATION FOR 10 SECONDS. THE ENGINE WAS BOROSCOPED WITH NO TROUBLE FOU - [SDR 9804851148](https://openairdocs.org/sdr/9804851148.md): Compressor · stalled · Mar 20, 1998 · N148US · Doug DC1040 · Fuel Controlling System > DURING THE LANDING ROLLOUT WHILE IN REVERSE THRUST AT 85 KTS, THE NR 3 ENGINE COMPRESSOR STALLED. THE EGT ROSE TO 900C BEFORE THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE WITH NO DEFECTS NOTED. THE REVERSER WAS PLACED ON MEL 78-1A DUE TO LACK - [SDR 9803411147](https://openairdocs.org/sdr/9803411147.md): Engine · failed · Feb 24, 1998 · N147US · Doug DC1040 · Engine (Turbine/Turboprop) > DURING LANDING ROLLOUT WHILE IN REVERSE THRUST, THE NR 1 ENGINE COMPRESSOR STALLED. THE AIRPORT TOWER REPORTED SMOKE FROM THE TAILPIPE OF THE NR 1 ENGINE. THE ENGINE WAS SHUT DOWN USING THE EMERGENCY COM PROCEDURE, EGT DID NOT EXCEED 700C. MAINTENANCE INSPE - [SDR 9803131144](https://openairdocs.org/sdr/9803131144.md): Compressor · stalled · Feb 22, 1998 · N144JC · Doug DC1040 · Turbine Engine Compressor Section > DURING CRUISE AT FL370, THE NR 2 ENGINE COMPRESSOR STALLED, EGT ROSE TO 940C AND THE ENGINE WAS SHUT DOWN. A RESTART ATTEMPT AT FL330 WAS SUCCESSFUL AND THE ENGINE OPERATION WAS NORMAL FOR THE REMAINDER OF THE FLIGHT. MAINTENANCE INSPECTED THE ENGINE PER TAF - [SDR 9802281160](https://openairdocs.org/sdr/9802281160.md): Tr Unit · malfunctioned · Feb 7, 1998 · N160US · Doug DC1040 · Engine Thrust Reverser > DURING LANDING ROLL AND WHILE COMING OUT OF REVERSE THRUST, THE NR 2 ENGINE THRUST REVERSER REMAINED DEPLOYED. THE CREW ATTEMPTED TO RECYCLE THE REVERSER AND A COMPRESSOR STALL OCCURRED. THE ENGINE WAS SHUT DOWN WITH A MAXIMUM EGT OF 800C. MAINTENANCE INSPE - [SDR 9801791156](https://openairdocs.org/sdr/9801791156.md): Actuator · out of adjust · Jan 26, 1998 · N156US · Doug DC1040 · Engine Thrust Reverser > ON TAKEOFF ROLL AT APPROXIMATELY 60 KNOTS, THE NR 3 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED THE THRUST REVERSER AND ADJUSTED A LOCK ACTUATOR. THE OPERATIONAL CHECK - [SDR 9800421154](https://openairdocs.org/sdr/9800421154.md): Bypass Switch · failed · Jan 7, 1998 · N154US · Doug DC1040 · Engine Oil Indicating System > DURING CLIMBOUT, THE NR 1 ENGINE OIL FILTER BYPASS WARNING LIGHT ILLUMINATED FOR ONE MINUTE. ALL OTHER INDICATIONS WERE NORMAL AND THE LIGHT EXTINGUISHED WITH NO ACTION. DURING DESCENT INTO MSP, THE LIGHT ILLUMINATED AGAIN AND THE CREW SHUT DOWN THE NR 1 ENG - [SDR 9724251160](https://openairdocs.org/sdr/9724251160.md): Compressor · stalled · Dec 22, 1997 · N160US · Doug DC1040 · Turbine Engine Compressor Section > DURING LANDING ROLLOUT, WHILE IN REVERSE THRUST THE NR 3 ENGINE COMPRESSOR STALLED. THE EGT ROSE TO 880C BEFORE THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE PER MM71-00-00 WITH NO DEFECTS NOTED. THE ENGINE WAS RUN WITH NORMAL INDICATIONS. THE - [SDR 9723231141](https://openairdocs.org/sdr/9723231141.md): Engine · failed · Dec 15, 1997 · N141US · Doug DC1040 · Engine (Turbine/Turboprop) > DURING CLIMB, THE CREW OBSERVED SPARKS EXITING FROM THE REAR OF THE NR 3 ENGINE EVERY 15 TO 20 SECONDS. ALL ENGINE INSTRUMENTS INDICATED NORMAL AND NO VIBRATION WAS NOTICED. THE FLIGHT RETURNED TO BOS. MAINTENANCE FOUND MOLTEN METAL ON THE BLEED SCREEN AND - [SDR 9723131161](https://openairdocs.org/sdr/9723131161.md): Start Valve · malfunctioned · Dec 4, 1997 · N161US · Doug DC1040 · Engine Start Valves/Controls > DURING CRUISE, THE NR 1 ENGINE START VALVE OPEN LIGHT ILLIMINATED. CREW FOLLOWED COM PROCEDURE AND THEN DIVERTED TO BOS FOR MAINTENANCE. START VALVE WAS FOUND IN THE CLOSED POSITION WHEN AIRCRAFT ARRIVED BUT WAS CHANGED PRECAUTIONARY. START VALVE INDICATION - [SDR 9722511146](https://openairdocs.org/sdr/9722511146.md): Tr Unit · malfunctioned · Dec 3, 1997 · N146US · Doug DC1040 · Engine Thrust Reverser > ON TAKEOFF ROLL AS POWER WAS APPLIED, THE NR 1 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. TAKEOFF WAS ABORTED AT APPROXIMATELY 30 KTS AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE PLACED THE REVERSER ON MEL 78-1A. - [SDR 9722411160](https://openairdocs.org/sdr/9722411160.md): Compressor · stalled · Dec 2, 1997 · N160US · Doug DC1040 · Turbine Engine Compressor Section > DURING LANDING ROLLOUT, THE NR 3 ENGINE COMPRESSOR STALLED, EGT REACHED 1000C FOR 1 TO 2 SECONDS BEFORE THE ENGINE WAS SHUT DOWN. MAINTENANCE DEACTIVATED THE THRUST REVERSER PER MEL AND INSPECTED THE INLET AND EXHAUST WITH NO DAMAGE FOUND. THE BORESCOPE INSP - [SDR 9722521144](https://openairdocs.org/sdr/9722521144.md): Tr Unit · malfunctioned · Dec 1, 1997 · N144JC · Doug DC1040 · Engine Thrust Reverser > DURING TAKEOFF ROLL, THE NR 3 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. THE TAKEOFF WAS ABORTED AT 70 KTS WITH THE INDICATION EXTINGUISHING WITH POWER REDUCTION. MAINTENANCE PLACED THE REVERSER ON MEL 78-1A AND THE AIRCRAFT RETURNED TO SERVICE. - [SDR 9722201146](https://openairdocs.org/sdr/9722201146.md): Thrust Reverser · malfunctioned · Nov 26, 1997 · N146US · Doug DC1040 · Engine Thrust Reverser > DURING LANDING ROLLOUT, THE NR 1 ENGINE THRUST REVERSER FAILED TO STOW. THE CREW RECYCLED THE REVERSER AND A COMPRESSOR STALL OCCURRED. MAX EGT WAS 650C. THE ENGINE WAS SHUT DOWN. THE OUTBOARD REVERSER SLEEVE DEPARTED THE AIRCRAFT. MAINTENANCE LOCKED OUT - [SDR 9720491149](https://openairdocs.org/sdr/9720491149.md): Compressor · stalled · Nov 1, 1997 · N149US · Doug DC1040 · Turbine Engine Compressor Section > DURING TAKEOFF ROLL AND WHILE INCREASING POWER, THE NR 3 ENGINE EXPERIENCED A COMPRESSOR STALL. N2 WAS AT 70 PERCENT AND EPR WAS 1.35 WITH NO ABNORMAL ENGINE INDICATIONS. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED T - [SDR 9718111141](https://openairdocs.org/sdr/9718111141.md): Tach Ind · failed · Sep 28, 1997 · N141US · Doug DC1040 · Engine RPM Indicating System > ON TAKEOFF ROLL, THE NR 3 ENGINE N1 INDICATION SPIKED WHILE AT MAXIMUM POWER. THE TAKEOFF WAS ABORTED AT APPROXIMATELY 40 KNOTS. ALL OTHER PARAMETERS WERE NORMAL. THE AIRCRAFT RETURNED TO THE GATE WHERE MAINTENANCE DEFERRED THE N1 INDICATION UNDER MEL 77-1B - [SDR 9716251144](https://openairdocs.org/sdr/9716251144.md): Tr Light · illuminated · Aug 25, 1997 · N144JC · Doug DC1040 · Engine Thrust Reverser > ON TAKEOFF ROLL, THE NR 3 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. THE TAKEOFF WAS ABORTED AT 100 KNOTS AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE DEFERRED THE REVERSER INDICATION SYSTEM UNDER MEL 78-2A WITH THE REVERSER STOWED AND LOCKED. E - [SDR 9716051148](https://openairdocs.org/sdr/9716051148.md): Tr Cable · out of adjust · Aug 21, 1997 · N148US · Doug DC1040 · Engine Thrust Reverser > WHILE ADVANCING THROTTLES TO TAKEOFF POWER, THE NR 2 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. THE TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE LOCKED OUT THE NR 2 THRUST REVERSER AND PLACED IT ON MEL 78-1A. AIRCRAFT THEN DE - [SDR 9715581149](https://openairdocs.org/sdr/9715581149.md): Tr Unit · malfunctioned · Aug 13, 1997 · N149US · Doug DC1040 · Engine Thrust Reverser > DURING LANDING ROLLOUT, THE NR 3 ENGINE THRUST REVERSER DID NOT STOW. THE NR 3 ENGINE EGT CLIMBED TO 920C AND THE ENGINE WAS SHUT DOWN. MAINTENANCE INSPECTED THE ENGINE PER MM 70-00-00. EGT WAS WITHIN LIMITS AND NO DEFECTS WERE NOTED. GROUND RUN OF ENGINE - [SDR 09712131148](https://openairdocs.org/sdr/09712131148.md): Engine · malfunctioned · Jun 22, 1997 · N148US · Doug DC1040 · Engine (Turbine/Turboprop) > CREW ABORTED TAKEOFF AT 110 KNOTS WHEN THE NR 1 ENGINE WOULD NOT REACH TAKEOFF EPR. TAKEOFF EPR WAS SET TO 1.51, BUT NR 1 ENGINE ONLY REACHED 1.45. ALL OTHER ENGINE INDICATIONS WERE NORMAL. CREW RAN ENGINE TO TAKEOFF EPR OF 1.51 AND PERFORMED BLEED CHECK PE - [SDR 9711421146](https://openairdocs.org/sdr/9711421146.md): Tr Unit · locked out · Jun 14, 1997 · N146US · Doug DC1040 · Engine Thrust Reverser > DURING TAKEOFF ROLL, NR 2 ENGINE THRUST REVERSER UNLOCK LIGHT ILLUMINATED. TAKEOFF WAS ABORTED AT 90 KNOTS. MAINTENANCE VERIFIED THAT THE THRUST REVERSER WAS LOCKED OUT AND CHANGED THE MEL TO 78-2A. - [SDR 9711121160](https://openairdocs.org/sdr/9711121160.md): Duct · loose · Jun 6, 1997 · N160US · Doug DC1040 · Pneumatic Distribution System > AT APPROXIMATELY V1 SPEED, THE NR 1 ENGINE FIRE WARNING LIGHT AND BELL ACTIVATED AND AT 800 FT AGL THE NR 1 REVERSER UNLOCK LIGHT ILLUMINATED. THE NR 1 ENGINE WAS SHUT DOWN PER IAW COM PROCEDURES AND FUEL WAS DUMPED. AIRCRAFT RETURNED TO MSP AND LANDED WITHO - [SDR 9710721156](https://openairdocs.org/sdr/9710721156.md): Compressor · stalled · Jun 4, 1997 · N156US · Doug DC1040 · Turbine Engine Compressor Section > DURING TAKEOFF ROLL, PASSENGERS REPORTED A FLASH AND FLAME BALL FROM LEFT WING. ALSO, TOWER REPORTED HEARING A LOUD NOISE. TAKEOFF WAS ABORTED AT 80 KNOTS. CREW SUSPECTED NR 1 ENGINE COMPRESSOR STALL BUT REPORTED NO ABNORMAL INDICAITONS. MAINTENANCE INSPEC - [SDR 9710311147](https://openairdocs.org/sdr/9710311147.md): Engine · overtemp · May 27, 1997 · N147US · Doug DC1040 · Engine (Turbine/Turboprop) > ON LANDING WITH ALL ENGINES IN REVERSE THRUST, NR 1 ENGINE OVERTEMPED REACHING MAX EGT 980 CELSIUS. THE NR 1 ENGINE WAS SHUTDOWN WITH REVERSER UNLOCK LIGHT STILL ILLUMINATED. MAINTENANCE INSPECTED INLET AND EXHAUST, RAN ENGINE AT IDLE, AND CYCLED REVERSER SE - [SDR 9710111158](https://openairdocs.org/sdr/9710111158.md): Compressor · stalled · May 21, 1997 · N158US · Doug DC1040 · Turbine Engine Compressor Section > AT 1,400 FEET DURING TAKEOFF, THE NR 2 ENGINE COMPRESSOR STALLED TWICE WITH EGT MOMENTARILY REACHING 900C ON BOTH OCCASIONS. NO OTHER ABNORMAL INDICATIONS. MAINTENANCE CONTROL RECOMMENDED DIVERSION TO BOS FOR MAINTENANCE. INSPECTION FOUND COMPRESSOR BLADE P - [SDR 9709171148](https://openairdocs.org/sdr/9709171148.md): Compressor · stalled · May 7, 1997 · N148US · Doug DC1040 · Turbine Engine Compressor Section > DURING TAKEOFF ROLL WITH POWER APPLICATION, THE NR 3 ENGINE COMPRESSOR STALLED. TAKEOFF WAS ABORTED WITH NO ENGINE LIMITS EXCEEDED. SECOND TAKEOFF WITH SLOWER POWER APPLICATION WAS NORMAL. MAINTENANCE VISUALLY INSPECTED ENGINE PER MM 71-00-00. NO DEFECTS W - [SDR 9708341160](https://openairdocs.org/sdr/9708341160.md): Tr Light · illuminated · Apr 27, 1997 · N160US · Doug DC1040 · Engine Thrust Reverser > DURING TAKEOFF ROLL, THE NR 2 ENGINE AMBER REVERSER UNLOCK LIGHT ILLUMINATED AND TAKEOFF WAS ABORTED. MAINTENANCE VERIFIED REVERSER WAS STOWED AND ALL LOCKPLATES INSTALLED. MEL 78-2A WAS ADDED. SPECIFIC PART CAUSING PROBLEM TO BE DETERMINED. - [SDR 9707431160](https://openairdocs.org/sdr/9707431160.md): Erp Indicator · malfunctioned · Apr 13, 1997 · N160US · Doug DC1040 · Engine Pressure Ratio (EPR) > DURING TAKEOFF, NR 1 ENGINE EPR LOW. TAKEOFF WAS ABORTED AT 100 KNOTS. MAINTENANCE REPLACED EPR INDICATOR. ENGINE GROUND RUN AND EPR INDICATION AT IDLE AND TAKEOFF POWER WAS NORMAL. - [SDR 9704011160](https://openairdocs.org/sdr/9704011160.md): Compressor · stalled · Feb 26, 1997 · N160US · Doug DC1040 · Turbine Engine Compressor Section > SHORTLY AFTER TAKEOFF, THE NR 2 ENGINE EXPERIENCED A COMPRESSOR STALL AT 300 FEET. ENGINE EGT BRIEFLY REACHED 985 AND THEN ALL INDICATIONS RETURNED TO NORMAL. FLIGHT CREW DECIDED TO RETURN TO DEPARTURE AIRPORT. PRIOR TO AN UNEVENTFUL LANDING, 110,000 LBS OF - [SDR 9703731149](https://openairdocs.org/sdr/9703731149.md): Oil Quantity · low · Feb 22, 1997 · N149US · Doug DC1040 · Turbine Engine Oil System > DURING CRUISE FLIGHT, THE NR 3 ENGINE LOW OIL QUANTITY AND OIL PRESSURE DEVELOPED. THE NR 3 ENGINE WAS SHUT DOWN AND THE AIRCRAFT DIVERTED TO YMX. AN UNEVENTFUL LANDING WAS PERFORMED. MAINTENANCE CHECKED FOR OIL LEAKS, INSPECTED CHIP DETECTORS, ADDED ENGINE - [SDR 9703081146](https://openairdocs.org/sdr/9703081146.md): Compressor · stalled · Feb 12, 1997 · N146US · Doug DC1040 · Turbine Engine Compressor Section > DURING LANDING, THE NR 3 ENGINE COMPRESSOR STALLED WHILE IN REVERSE. ENGINE WAS SHUT DOWN WHILE STILL IN REVERSE. PERFORMED INSPECTION WITH NO FAULTS FOUND, OPERATIONAL CHECK OK. - [SDR 9702811152](https://openairdocs.org/sdr/9702811152.md): Fire Warning · illuminated · Feb 9, 1997 · N152US · Doug DC1040 · Fire Detection > DURING CLIMB, THE NR 3 ENIGNE FIRE INDICATION ILLUMINATED. SHUT DOWN ENGINE AND FIRE BOTTLE DISCHARGED. DUMPED 16,800 LBS AND RETURNED TO LAX. AIRCRAFT TO BE FERRIED TO MSP. - [SDR 9702491146](https://openairdocs.org/sdr/9702491146.md): Tt2 Sensor · failed · Feb 7, 1997 · N146US · Doug DC1040 · Engine BMEP/Torque Indicating > DURING TAKEOFF, THE NR 1 ENGINE FAILED TO ACCELERATE. TAKEOFF WAS ABORTED AT 70 KNOTS. MAINTENANCE REPLACED THE TT2 SENSOR AND RETURNED TO SERVICE. - [SDR 9700861141](https://openairdocs.org/sdr/9700861141.md): Epr Indicator · malfunctioned · Jan 19, 1997 · N141US · Doug DC1040 · Engine Pressure Ratio (EPR) > DURING TAKEOFF ROLL, THE NR 3 ENGINE EPR WAS LOW. TAKEOFF WAS ABORTED AT 50 KNOTS. MAINTENANCE FOUND EPR INDICATOR FAULTY. REPLACED THE EPR INDICATOR. - [SDR 9625751147](https://openairdocs.org/sdr/9625751147.md): Pt 7 Line · broken · Dec 2, 1996 · N147US · Doug DC1040 · Engine Pressure Ratio (EPR) > DURING TAKEOFF ROLLOUT, THE NR 3 ENGINE EXHIBITED LOWER POWER. THE TAKEOFF WAS ABORTED AND A/C RETURNED TO GATE. MAINTENANCE FOUND A BROKEN PT7 LINE BETWEEN 6 AND 8 O'CLOCK POSITION. REPAIR WAS DEFERRED PER MEL 77-3. - [SDR 9624451146](https://openairdocs.org/sdr/9624451146.md): Compressor · stalled · Nov 14, 1996 · N146US · Doug DC1040 · Turbine Engine Compressor Section > DURING POWER REDUCTION AT FL210, THE NR 1 ENGINE EXPERIENCED A COMPRESSOR STALL. AS EGT CLIMBED TO 750 DEGREES, THE ENGINE WAS SHUT DOWN AND RESTARTED. CREW FOLLOWED COCKPIT OPERATING PROCEDURE AND CONTINUED FLIGHT TO PHL WITHOUT FURTHER INCIDENT. VISUAL AN - [SDR 9624011158](https://openairdocs.org/sdr/9624011158.md): Compressor · stalled · Nov 10, 1996 · N158US · Doug DC1040 · Turbine Engine Compressor Section > AT FL310 WHEN POWER WAS REDUCTED FOR DESCENT, THE NR 2 ENGINE EXPERIENCED A COMPRESSOR STALL. THERE WAS A SUBSEQUENT VIBRATION UNTIL THE ENGINE WAS SHUT DOWN. NO ABNORMAL EGT OR FUEL FLOW INDICATION AT THE TIME OF INCIDENT. FLIGHT CONTINUED TO DTW WITHOUT F - [SDR 9621781150](https://openairdocs.org/sdr/9621781150.md): Compressor Blade · damaged · Oct 12, 1996 · N150US · Doug DC1040 · Turbine Engine Compressor Section > DURING CRUISE AT FL350, THE NR 1 ENGINE EXPERIENCED A COMPRESSOR STALL AND RECOVERED. EPR INCREASED AND N1 FLUCTUATED. CREW FOLLOWED COM PROCEDURES AND CONTINUED FLIGHT TO SEA WITHOUT FURTHER INCIDENT. BORESCOPE INSPECTION REVEALED DAMAGE TO THE 8TH STAGE H Next page: https://openairdocs.org/engine/pratt-whitney-jt9d-20j/reports.md?page=2 ## 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 = 'JT9D20J' ORDER BY difficulty_date DESC ``` This list as a web page: https://openairdocs.org/engine/pratt-whitney-jt9d-20j/reports --- 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.