JASC 7712
Service difficulty reports · 1,239
Reports filed under 7712 · Engine BMEP/Torque Indicating, newest first.
Query with SQL
duckdb -csv -c "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 jasc_code = '7712' ORDER BY difficulty_date DESC"
Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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 jasc_code = '7712' ORDER BY difficulty_date DESC
Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
SDR CA110722001Tscu · failedDURING CLIMB, FLIGHT CREW NOTICED THAT THE AUTOFEATHER ARM LIGHT DIDN`T EXTINGUISH AFTER IT WAS DESELECTED. DECISION WAS TAKEN TO RETURN TO THE DEPARTURE STATION. MX ON SITE REPLACED THE NR2 TORQUE SIGNAL CONDITIONER UNIT (TSCU). ENGINE RUNS WERE COMPLETESDR 2011FA0000436Indicator · failedLOSS OF ENGINE TORQUE INDICATION.SDR TRBA2011073Indicator · inoperativeTHE CREW REPORTED THE NR 1 TORGUE GAUGE BLANK AND A STRONG ELECTRICAL ODOR AND THE ENGINE INDCIATOR CTL TORQUE, ENGINE 1 CIRCUIT BREAKER POPPED. THE AIRCRAFT WAS REMOVED FROM SERVICE. R & R THE TORQUE INDICATOR IAW JIC 77-13-81. THE OPS CHECK WAS GOOD, NO DESDR QMLA2011060411062Indicator · fluctuatesMADE THE FIRST LEG FROM BASE TO HOSPITAL, LANDED FINE, KEPT BOTH ENGINE RUNNING AT IDLE, PATIENT LOADED, READY TO GO, HOVER CHECK WITH BOTH ENG NR 1 & NR 2 TORQUE NEEDLE MATCH AT 60 PERCENT, MAX PERFORMANCE TAKEOFF TO ABOUT 150FT OGE, ENG NR2 TORQUE GAUGE DROPSDR CA110406012Control Unit · malfunctioned(CAN) SHORTLY AFTER ENTERING CRUISE FLIGHT THE PF NOTED A 5% TORQUE SPLIT. THE PF WAS ABLE TO SUCCESSFULLY MATCH THE TORQUES WITH THE COLLECTIVE TRIM SWITCH. A FEW MOMENTS LATER AFTER COMPLETING A CRUISE CHECK, THE PILOTS NOTED A LARGE TORQUE SPLIT IN EXCESSSDR AALA20110321DFW01Tach Generator · inoperativeDFW - CREW REPORTED DURING TAKEOFF RIGHT N3 GAUGE BECAME ERRATIC WITH ALL OTHER RIGHT ENGINE GAUGES NORMAL. ALSO HAD RIGHT ENGINE BLEED "OFF" LIGHT, RIGHT CENTER FUEL PUMP PRESS LIGHT AND RIGHT ENGINE SPEED CARD STATUS MESSAGE DISPLAYED. EMERGENCY DECLARED FSDR GLBA20110223AIndicator · reads lowRIGHT ENGINE TORQUE GAUGE WENT DOWN ON CLIMB OUT. ALL OTHER ENGINE INDICATIONS WERE NORMAL,NOTICED ON TAXI IN TORQUE GAUGE WAS BELOW ZERO. MAINTENANCE PERFORMED PARAMETER RUNUP OF LT & RT ENGINES. ALL CHECKS GOOD COULD NOT DUPLICATE DISCREPANCY.SDR CA110222003Signal Cond Unit · malfunctioned(CAN) THE FLIGHT CREW REJECTED TAKEOFF WHEN THE RT ENGINE TORQUE INDICATION WAS LOST. LINE MAINTENANCE DETERMINED THAT THE LOST OF INDICATION WAS THE RESULT OF A FAULTY TORQUE SENSOR CONDITIONER UNIT, TSCU. THE RT ENGINE TSCU WAS REPLACED AND THE SYSTEM CHECSDR NSVA2011022Unknown · disconnectedVERIFIED CTOT DISCONECT AND MEL'D #43580 ALSO MEL'D APR 43581 DUE TO CTOT MEL.SDR QMLA201101061003Indicator · malfunctionedPILOT STATED TORQUE WENT TO 110.6 FOR (1) SECOND DURING START. CLEARED FAULT FROM GAUGE IAW MM CH 76, PROPULSION INSTRUMENT GUIDE AND EMC-35A MX GUIDE. NO FADEC FAULTS NOTED. COMPLIED WITH MM 71-14, 71-7, 71-8, TABLE 95-4 AND MM 72-00-00 PARA 1.B, PAGE 622. SDR CA101020002Torque Sensor · brokenTHE TORQUE SENSOR ASSY PN 3101726-3 FAILED. GEAR, PN 3103589-1, WAS FOUND WITH THE INTERNAL SPLINES STRIPPED. SPLINED DRIVE GEARSHAFT, PN 3103405-2, WAS ALSO FOUND STRIPPED. WHEN THESE PARTS FAILED THE INTEGRITY OF THE FCU DRIVE TRAIN WAS LOST AND THE ENGINESDR CA100921004Indicator · faultyTORQUE FLUCTUATION AFTER T/O, THE CREW NOTED INDICATED TORQUE FLUCTUATIONS AND OVERTEMP CONDITION. THE POWER WAS REDUCED, A PRECAUTIONARY SHUTDOWN PERFORMED AND THE ACFT RETURNED TO THE POINT OF DEPARTURE WHERE AN UNEVENTFUL SINGLE ENGINE LANDING WAS MADE. TSDR NSVA2010152Ctot Panel · damagedABORTED TAKEOFF DUE TO THE CTOT SWITCH BRAKING OFF. REPLACED CTOT PANEL, OPS CHECKED GOOD.SDR GUUA93377072810ATransducer · fluctuatesDURING TEST FLIGHT, LT TORQUE GAUGE WENT TO 5,000 THEN STARTED TO FLUCTUATE TO ZERO. REPLACED LT TORQUE TRANSDUCER, OPERATIONAL CHECK OK. TEST FLIGHT SATISFACTORY.SDR NSVA2010102Indication Sys · malfunctionedABORTED TAKEOFF FOR CONFIGURATION WARNING. REMOVED AND REPLACED CTOT, OPS CHECKED GOOD.SDR CA100709005Signal Cond Unit · malfunctionedCREW EXPERIENCED AN UNSCHEDULED PROP FEATHER ON ENGINE NR 1 DURING TAKEOFF. MEMORY ITEMS PERFORMED. QRH WORK CARRIED OUT. CABIN AND PASSENGERS INFORMED ACCORDINGLY, FOLLOWED BY NORMAL AND UNEVENTFUL RELANDING. AFTER NORMAL DISEMBARKATION OF PASSENGERS A/C SDR QMLA2010060510020Torque Box · malfunctionedNR 2 ENGINE TORQUE SYS FAILURE.SDR CA100608006Indicator · oscillatesLOSS OF TORQUE/IFSD DURING FLIGHT, THE PILOTS OBSERVED LT ENGINE SURGING AND TORQUE OSCILLATIONS. CREW SHUTDOWN ENGINE AND AN UNEVENTFUL SINGLE ENGINE LANDING AT THE INTENDED DESTINATION FOLLOWED. THE CONDITION OF THE ENGINE IS UNKNOWN BUT IT WILL BE REMOVED ASDR NSVA201075Unknown · malfunctionedCAPTAIN APPLIED POWER FOR TAKEOFF AND THERE WAS A TORQUE SURGE. CAPTAIN ELECTED TO ABORT TAKEOFF AND RETURNED TO GATE. COULD NOT DUPLICATE GRIPE.SDR HNAA2010042000089Tscu · malfunctionedNR 1 TORQUE INDICATOR WENT FROM 90 PERCENT TO ZERO IN CLIMBOUT, ON GROUND, TORQUE WENT FROM ZERO TO 156 PERCENT TORQUE. SHUT DOWN ENGINE. ALL OTHER PARAMETERS WERE NORMAL. SURGING ABNORMALITY, BOTH ANALOG AND DIGITAL WERE AFFECTED. REMOVED AND REPLACED TSCSDR CA100521001Connector · contaminatedIFSD DURING CRUISE, NP SPEED INCREASED SUDDENLY, WITH CORRESPONDING TORQUE DECREASE. ACFT LANDED IMMEDIATELY, UNEVENTFUL LANDING. SOME CONNECTORS WERE FOUND LOOSE AND FULL OF OIL. ON A SUBSEQUENT FLIGHT, THE SAME HAPPENED (HIGH NP, LOW TQ) BUT THIS TIME THESDR CA100216016Indicator · erratic(CAN) CREW REPORTED THAT THE NR1 TORQUE INDICATOR WAS FLUCTUATING ERRATICALLY AND THE TORQUE INDICATOR CIRCUIT BREAKER HAD TRIPPED. AN INSP OF THE NR1 ENGINES FWD WIRE LOOM FOUND SEVERAL CHAFED WIRES. THE WIRES WERE CHAFING AGAINST THE FWD LOWER ENGINE COWL. SDR CA100224001Indicator · malfunctioned(CAN) POWER ROLLBACK: DURING FLIGHT, THE ACFT ENCOUNTERED TURBULENCE AND THE PILOT REDUCED ENGINE POWER AT WHICH TIME THE RT ENG POWER WENT ALL THE WAY DOWN TO MIN FLOW, WITH TORQUE INDICATING 2700 LBS. THERE WAS NO RESPONSE TO THROTTLE MOVEMENTS. THE ACFT LASDR UALA2010020100383Circuit Card · malfunctionedIDLE DISAGREE EICAS LTN1 30 PERCENT RT 38 PERCENT N1 EQUAL W/ENG AI ON. INTEGRATED BOTH LT-RT PIMUS, IDENTIFIED LEFT ENGINE NUMEROUS FAULTS. REPLACED LT ENGINE SPEED CARD IAW MM. GRD TEST CARD OK.SDR SWIA201023531Signal Cond Unit · failedRIGHT TORQUE GAUGE FLUCTUATED ON TAKEOFF CAUSING AN AUTO FEATHER. (FLT 6549) REPLACED RIGHT TORQUE SIGNAL CONDITIONER AND RIGHT TORQUE SENSOR.SDR AALA20100120YYZ01Sensor · faultedYYZ - CREW REPORTED THAT DURING CLIMB RIGHT ENGINE HAD A SURGE THAT WAS CONFIRMED WITH ENGINE GAUGES. EMERGENCY DECLARED RETURNED YYZ LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED T12 SENSOR THAT WAS FAULTED. SYSTEM GROUND CHECKED NORMALSDR CA100125007Indicator · inoperative(CAN) WHILE PRACTICING LANDINGS AND APPROACHES, WITH THE LT ENGINE IN MANUAL MODE, THE RT ENGINE TORQUE INDICATION WENT TO ZERO. PILOT THINKING HE HAD LOST THE RT ENG, INCREASED POWER TO THE LT ENG AND AN OVERSPEED WARNING SOUNDED. PILOT MANAGED TO SAFELY LANSDR TRBA2009126Sensor · failedDURING CRUISE NR 1 ENG TORQUE FLUCTUATES INTERMITTENTLY +/- 3 PERCENT. DURING APPROACH NR 1 ENG SURGING FROM APPROX 0 PERCENT TO 30 PERCENT TO 40 PERCENT TORQUE. SHUTDOWN ENG FOR ACFT CONTROL. REMOVED AND REPLACED NR 2 TORQUE SENSOR ON LT ENG IAW AMM JIC NR SDR TRBA2009119Indicator · failedNR 2 ENG STARTED LOSING TQ ON DESCENT. ALL OTHER INDICATIONS WERE NORMAL. EMERGENCY DECLARED. REMOVED AND REPLACED NR2 TORQUE INDICATOR IAW JIC 77-13-18. PERFORMED ENGINE TRIMMING IAW JIC 73-23-61. OPS CHECK GOOD AT THIS TIME.SDR NSVA2009068Ctot Panel · unserviceableABORTED TAKEOFF DUE TO CTOT AND APR INOP. REMOVED AND REPLACED THE CTOT PANEL, P/N 7239060-503.SDR NSVA2009067Indicator · unserviceableABORTED TAKEOFF DUE TO LEFT ENGINE TORQUE GAUGE INOP. REMOVED AND REPLACED TORQUE INDICATOR, P/N 10225N01W00.SDR HNAA121500351Indicator · malfunctionedNO RESPONSE ON NR 2 ENG TORQUE INDICATION DURING TAKEOFF. CHECKED FOR SECURITY OF CONNECTOR AT TSCU/ECU AND TORQUE PROB. NO DEFECT NOTED. REMOVED AND REINSTALLED TORQUE INDICATOR IAW AMM 77-10-00, SELF TEST GOOD. GROUND RAN ACFT TO 90 PERCNET TORQUE, NO EFSDR USAA2009111993173Indicator · faultyFLT 1171 - CLT TO IAH - SHORTLY AFTER TAKEOFF NR 2 ENGINE WAS INDICATING LOW TORQUE. THE CREW DECIDED TO RETURN TO THE FIELD. NO EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED WITHOUT FURTHER INCIDENT. REPLACED NR 2 ENGINE N1 INDICATOR 64211.SDR CA090924005Tscu · failed(CAN) AFTER TAKEOFF NR 1 ENG MANUAL CAUTION LIGHT CAME ON. THIS WAS FOLLOWED BY A POWER ROLL BACK AND LOSS OF NR 1 TQ INDICATION. CREW FEATHERED ENG AND THEN SHUT IT DOWN. NR 1 TSCU (TORQUE SIGNAL CONDITIONING UNIT) WAS REPLACED AND ENG RUNS CARRIED OUT SUCCESDR QMLA0911200909030Wheel · loosePHONOLIC WHEEL FOR TORQUE SENSING FOUND LOOSE ON ENGINE POWER SHAFT DURING TROUBLESHOOTING OF AMBER GOVERNOR LIGHT ON CAUTION PANEL. POWER SHAFT IS POST TU 81A, PRE TU 122A.SDR SWIA200922513Signal Cond Unit · faultyLEFT PROP AUTO-FEATHERED UNCOMMANDED. (FLT 6181) REPLACED LEFT ENGINE TORQUE SIGNAL CONDITIONER.SDR SWIA200922496Signal Cond Unit · faultyLEFT PROP AUTO-FEATHERED UNCOMMANDED. (FLT 6192) REPLACED TORQUE SIGNAL CONDITIONER.SDR HNAA2009072900232Tscu · failedNR 1 TORQUE GAUGE WENT TO ZERO ON T/O ROLL. REMOVED AND REPLACED NR 1 TSCU. RUN-UP CHECK GOOD IAW -8 RUN UP MANUAL. EVALUATION FLIGHT SATISFACTORY.SDR CA090721004Fitting · leaking(CAN) DURING A PREFLIGHT, FLIGHT CREW NOTED AN OIL LEAK. MX INSP THE ACFT AND FOUND THE 2 SCREWS THAT SECURES THE OIL FITTING TO TOP OF TORQUE LIMITER, LOOSE. THIS IS A SECOND OCCURENCE WITH THE TORQUE LIMITER AND LOOSE SCREWS. THESE SCREWS ARE INSTALLED ASDR CA090714008Screw · failed(CAN) DURING A MX ACTION IT WAS NOTED THAT LOCKWIRE ON TOP OF TORQUE LIMITER WAS LOOSE. THIS LOCKWIRE LOCKS 2 SCREWS WHICH HOLD OIL FITTING AND LINE THAT ATTACHES TO TORQUE TRANSDUCER. LOCKWIRE WAS REMOVED AND ONE SCREW WAS FOUND STRIPPED INTERNALLY. A SERISDR 2013FA0000081Gear · failedTORQUE SENSOR GEAR TEETH SHEARED ON CAM SET AND ALSO SHEARING OFF THE OPPOSITE GEAR ON THE HIGH SPEED PINION GEAR SHAFT.SDR GLBA200906011Indicator · malfunctionedNR 2 TORQUE GAUGE DROPPED TO 0 ON TAKEOFF ROLL. THE NR 2 TORQUE GAUGE DROPPED TO ZERO. MX REMOVED AND REPLACED THE NR 2 TORQUE GAUGE IAW MM 31-10-00. OPS CHECK WAS GOOD.SDR GLBA20090528ASwitch · intermittentPILOTS REPORTED THAT WHILE CLIMBING THROUGH 13000 FT. THE TORQUE DROPPED TO 0% ON THE NR 2 ENGINE AND EEC AURAL AND ANNUNCIATOR WARNINGS WERE PRESENT WHEN THEY REACHED APPROXIMATELY 13,500 FT. ALL INDICATIONS FULLY RECOVERED 20 SECONDS LATER. MAINTENANCE REMOSDR GLBA20090527ASwitch · malfunctionedPILOTS REPORTED THAT WHILE CLIMBING THROUGH 13000 FT. THE TORQUE DROPPED TO 0% ON THE NR 2 ENGINE AND EEC AURAL AND ANNUNCIATOR WARNINGS WERE PRESENT WHEN THEY REACHED APPROXIMATELY 13,500 FT. ALL INDICATIONS FULLY RECOVERED 20 SECONDS. THE REST OF THE FLIGHTSDR VOX2009F00002Torque Sensor · failedPILOT REPROTED AFTER TAKEOFF, EXPERIENCED RT ENGINE SPOOLED DOWN. SECURED ENGINE AND RETURNED TO DEPARTURE. FOLLOW UP: TORQUE SENSOR FAILED IN RT ENGINE. (K)SDR GLBA20090410BIndicator · fluctuatesDURING FLIGHT NOTICED 2 PERCENT FLUCTUATION ON NR 1 N 1 GAUGE AND FLUCTUATIONS ON NR 1 TORQUE GAUGE CONTINUED UNTIL SHUTDOWN. MAINTENANCE R & R LT BETA BLOCK AND RIGGED BETA VALVE LOW PITCH STOP PER MM 76-10-00. MAINTENANCE ADDITIONALLY R & R TACH GENERATOR ISDR AALA2009011800170Stator · failedJFK INFLIGHT ORD TO MAN - CREW REPORTED NR 1 ENGINE HIGH PRESSURE ROTOR SPEED INDICATION FAILURE ACCOMPANIED BY LEFT CENTER FUEL PUMP PRESSURE LIGHT. IN DESCENT AT IDLE THRUST LEFT OIL PRESSURE INDICATION TURNED AMBER WITH 33 PSI. LANDED JFK WITHOUT INCIDENTSDR HNAA2009010300374Indicator · inoperativeWHILE ADVANCING POWER LEVERS FOR TAKEOFF, THE NR 1 ENGINE TORQUE GAUGE WAS FOUND TO BE INOPERATIVE. THE CIRCUIT BREAKER FOR THE GAUGE WAS FOUND TO BE POPPED. THE TAKEOFF WAS ABORTED AND THE ACFT WAS RETURNED TO THE GATE. MX CHANGED THE NR 1 ENGINE TORQUE INSDR ZESA2008014Sensor · out of limitsCREW IDENTIFIED DURING TAKEOFF THAT THE THROTTLE POSITION WHEN MATCHED SHOWED THE LT ENGINE AT 88 PERCENT AND THE RT ENGINE AT 37 PERCENT. RT ENGINE TOOK APPX 4-5 SECONDS TO CATCH UP TO THE LT. MAINT TROUBLESHOT AND REPLACED THE RT ENGINE T1 SENSOR. OPS CHESDR SIMA200824604Unknown · unknownON FLIGHT 3248 CREW REPORTED ON ABORTED TAKE OFF DUE TO NO TORQUE INDICATING ON NR 2 ENGINE, NO BOTTOM GOVERNING AND PROP RPM WILL NOT COME ABOVE 1000 RPM. ACFT REMOVED FROM SERVICE. PERFORMED GROUND RUN IAW SAAB AND GE MM NO FAULTS FOUND ACFT RETURNED TO SER
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