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 CA140729008Indication Sys · malfunctioned(CAN) AT START OF TAKE OFF ROLL WITH TRQ LESS THAN 50% AND AUTOFEATHER WAS SELECTED BUT HAD NOT ARMED, THE #2 ALT FEATHER PUMP CAME ON AND PROP STARTED TO FEATHER. FLT CREW IMMEDIATELY REDUCE PWR LEVERS TO IDLE. CREW STATE THAT THEY DID NOT OVER TORQUE THE ENGSDR TXHA20140630001Transmitter · false indicationPILOT REPORTED FAULTY TORQUE INDICATION ON RT ENG.SDR CA140818002Transducer · erratic(CAN) ERRATIC TORQUE INDICATION DURING FLIGHT.SDR CA140522006Indicator · stuck(CAN) TORQUE INDICATOR WOULD NOT INDICATE DUE TO NEEDLE "FROZEN" NOT MOVING. REMOVED SN 302 AND INSTALLED PN 206-075-185-003, TSI 0.0.SDR CA140402010Circuit Card · failed(CAN) A ARNIC FAULT CODE WAS NOTED ON SHUTDOWN BUT NO OCCURRENCE ON SUBSEQUENT FLIGHT OR FAULT COULD BE FOUND, THOUGHT TO BE A SOFTWARE GLITCH AS THESE PHANTOM CODES SOMETIMES HAPPEN. SUBSEQUENTLY A OUT RANGE NR CODE STARTED TO APPEAR ON EVERY SHUTDOWN. THISSDR CA140123002Indicator · inoperative(CAN) WHEN POWER WAS ADVANCED FOR TAKEOFF THE NR 1 ENGINE TORQUE INDICATOR NEEDLE DID NOT INCREASE AND WAS READING APPROXIMATELY 5 PERCENT.SDR CA140123001Torque Sensor · fluctuates(CAN) NR 1 ENGINE TORQUE NEEDLE FLUCTUATED VERY SLIGHTLY BUT CONTINUOUSLY DURING CLIMB AND CRUISE. FLUCTUATION OCCURRED WHEN POWER LEVER WAS BOTH IN AND OUT OF THE NOTCH POSITION.SDR CA131009012Tscu · failed(CAN) DURING CLIMB, FLIGHT CREW REPORTED THAT THE NR 1 ENGINE TORQUE INDICATOR SURGED TO 152 PERCENT. AS THE FLIGHT CREW WAS EVALUATING THE SITUATION, THE NR 2 TORQUE STARTED TO FLUCTUATE. DECISION WAS TAKEN TO RETURN AND LAND. AN EMERGENCY WAS DECLARED AND TSDR AC2A201309170001Torque Sensor · damagedENGINE TORQUE MISCOMPARE CAS MESSAGE ILLUMINATED DURING GROUND RUN. FOUND TORQUE SENSORS DAMAGED FROM CONTACT WITH ROTATING COMPONENT.SDR CHIR20131609001Inverter · out of adjustOPERATOR HAS EXPERIENCED ISSUES WITH MALADJUSTED TORQUE INVERTER, SIGNAL CONDITIONERS, ALSO KNOWN AS RATIO DETECTOR POWER SUPPLY, RDPS, ASSOCIATED WITH THE ENGINE TORQUE INDICATING SYSTEM. THE FAULT IS ASSOCIATED WITH THE IMPROPER VOLTAGE OUTPUT FROM THE RDPS SDR ERAA201307080048Indicator · stuckLEFT TORQUE INDICATOR STUCK. R & R LT TORQUE INDICATOR, CALIBRATED INDICATOR IAW B1900D, MM 77-10-00. OPS CHECKED GOOD. OK FOR SERVICE.SDR CA140707002Transducer · malfunctioned(CAN) WRONG INDICATION WHEN THE TORQUE TRANSDUCER GETS WARM.SDR JJBA20130510009Indicator · false indicationDURING CRUISE FLIGHT, THE CREW REPORTED THAT THE NR1 TORQUE GAUGE INDICATED 17 PERCENT IN FLIGHT IDLE. MX REPLACED THE NR 1 ECU AND TRIMMED THE ENGINE AS A PRECAUTION.SDR SWIA201333223Signal Cond Unit · failedTAKEOFF AUTO FEATHER AURAL WARNING. AUTO FEATHER SWITCH WAS IN THE ON POSITION. (FLT 5473) REPLACED LEFT ENGINE TORQUE SIGNAL CONDITIONER. P/N: 3005-0000-57 S/N ON: MM4765 S/N OFF: MM4917SDR 39LA2013040500004Torquemeter · erraticWHILE ON TAKEOFF ROLL, THE LT ENGINE TORQUE GAUGE WAS GIVING ERRATIC INDICATIONS. TAKEOFF ABORTED AND TAXI TO RAMP WAS WITHOUT EVENT.SDR HNAA2013030600110Indicator · inoperativeNR 1 TORQUE GAUGE ANOLOG AND DIGITAL DID NOT GO ABOVE 10 PERCENT. CLEANED CONNECTOR ON TSCU. R & R NR 1 TORQUE INDICATOR. OPS CHECKED GOOD ON THE GROUND RUN, IAW MM 77-10-00.SDR CA130311009Signal Cond Unit · malfunctioned(CAN) DURING T/O ROLL THE AUTOFEATHER FAILED TO ARM ON THE NR 2 ENGINE. THE T/O WAS ABORTED AND THE ACFT RETURNED TO THE RAMP WHERE TROUBLESHOOTING FOUND A FAULTY TORQUE SIGNAL CONDITIONER UNIT. THE FAULTY UNIT WAS REPLACED AND THE ACFT RETURNED TO SERVICE. SDR CA130314012Signal Cond Unit · malfunctioned(CAN) DURING THE TAKEOFF ROLL AUTO FEATHER FAILED TO ARM ON THE NR 2 ENGINE. FOLLOWING MAINTENANCE INVESTIGATION, THE NR 2 TORQUE SIGNAL CONDITIONER UNIT WAS FOUND TO BE UNSERVICEABLE. TORQUE SIGNAL CONDITIONER UNIT REPLACED FUNCTIONS CARRIED OUT ACFT NOW SERVSDR ERAA20130023Torquemeter · inaccurateNR 1 NH GAUGE INDICATES INCORRECTLY ON DIGITAL PORTION. REMOVED AND REPLACED NR 1 NH GAUGE IAW DASH 8 MM 77-12-00, OPS CHECKS GOOD.SDR 39LA2013012100003Indicator · inoperativeDURING TAKEOFF, RT TOURQE INDICATOR DROPPED TO ZERO. TAKEOFF WAS ABORTED. R & R NR 2 TORQUE INDICATOR IAW MM 77-10-20. OPS CHECK GOOD.SDR CA121116006Probe · failed(CAN) DURING INITIAL CLIMB AFTER T/O, THE CREW FELT A YAW FOLLOWED BY LT ENGINE UPTRIM INDICATION AND RT ENGINE AUTOFEATHER. EMERGENCY WAS DECLARED AND THE ACFT RETURNED TO THE DEPARTURE POINT WHERE AN UNEVENTFUL LANDING WAS PERFORMED. POST FLIGHT TROUBLESHOSDR TRBA20121026001Torque Sensor · inoperativeCREW REPORTED THAT ON THE TAKEOFF ROLL, THE ANALOG PORTION OF NR 1 TORQUE GAUGE WENT TO ZERO. DIGITAL PORTION NORMAL. ACFT REMOVED FROM SERVICE. R & R LT ENGINE TORQUE SENSOR IAW 72-01-60 AND LT ENGINE AFU IAW 72-01-10. PERFORMED OPS CHECK IAW EX-055007-CSSDR HNAA2012100901004Torque Sensor · failedDURING TAKEOFF, NR 2 TORQUE INDICATOR BOTH DIGITAL AND ANOLOG, DID NOT SHOW AN INCREASE. R & R NR 2 TORQUE INDICATOR IAW AMM 77-10-00. INSPECTED ASSOCIATED CONNECTOR PLUGS, NO DEFECTS NOTED. GROUND RAN ACFT. OPS CHECKED GOOD AT THIS TIME. OK FOR SERVICE.SDR CA121003005Engine · low torque(CAN) DURING CLIMB, APPROACHING 3000 FT, NR 2 ENGINE TORQUE SUDDENLY DROPPED TO ZERO. LOW OIL PRESSURE LIGHT ILLUMINATED. PILOT VERIFIED OIL PRESSURE ON THE OIL PRESSURE GAUGE AND IT WAS AT ZERO. FLIGHT CREW STOPPED THE ENGINE OPERATION. THE ACFT DIVERTED ASDR CA121003003Engine · low torque(CAN) THE CREW DEPARTED AND MADE A CLIMBING LT TURN AND CONTINUED ASCENT TO 8000. AT WHICH POINT THE POWER LEVER WAS SELECTED TO TRAINING POWER 40 PERCENT. ONCE THE POWER WAS SET TO 40 PERCNET THE TORQUE ON THE LT ENGINE DROPPED TO 0 PERCENT. CREW SECURED THSDR CA120904001Signal Cond Unit · failed(CAN) ADVANCING POWER LEVERS ON TAKEOFF, FLIGHT CREW NOTICED THAT THE AUTOFEATHER SYSTEM DIDN`T ARM THEN THE PROPELLER NR 1 FEATHERED AUTOMATICALLY AT AROUND 50 KNOTS. THE TAKEOFF ROLL WAS REJECTED AND THE ACFT RETURNED TO THE GATE. FLIGHT CREW CONFIRMED THASDR CA120827016Indicator · malfunctioned(CAN) GROUP WAS PREPARING FOR DISPATCH FOR PRACTICE. NR 1 ENGINE STARTED AND NR 2 ENGINE STARTED AND SECURED. ENGINE/PROP PROCEDURES FOLLOWED TO REMOVE LOCKS. IMMEDIATELY AFTER, THE NR 2 ENGINE INDICATED A LOSS OF RPM AND A HORSEPOWER INDICATION GREATER THANSDR CA120813013Indication Sys · malfunctioned(CAN) ON AUGUST 4, THE FLIGHT CREW REPORTED A TORQUE SPLIT BETWEEN BOTH ENGINES WITH AN ENGINE OUT WARNING THAT LASTED APPROXIMATELY 5 SECONDS, AND THEN RECOVERED. THE ACFT RETURNED TO BASE. ENGINE ELECTRONIC CONTROL CONNECTORS WERE CLEANED. THE ACFT WAS RESDR CA120813007Indication Sys · malfunctioned(CAN) IT IS REPORTED ENGINE HAD AN OVERTORQUE. TURBOMACHINE REMOVED DUE TO NL WENT TO 27 SECONDS ABOVE TRANSIENT LIMITS. TROUBLESHOOTING ONGOING.SDR CA120802013Indicator · malfunctioned(CAN) IT WAS REPORTED THAT THE ENGINE WAS NOT PRODUCING MORE THAN 43 PERCENT OF TORQUE LEADING TO AN ABORTED TAKEOFF. SAME ACFT HAD ANOTHER ABORTED TAKEOFF THE DAY BEFORE DUE TO TORQUE NOT GOING OVER 60 PERCENT. TROUBLESHOOTING ONGOING.SDR CA120726008Transducer · malfunctioned(CAN) DURING CLIMB POWER FLIGHT, CREW REPORTED THAT THE RT TORQUE GAUGE WOULD INTERMITTENTLY FLUCTUATE. MAINTENANCE REPLACED THE TORQUE TRANSDUCER WITH A NEW UNIT AND THE PROBLEM WAS RECTIFIED.SDR CA120723004Indication Sys · malfunctioned(CAN) PILOT IS REPORTING TORQUE IS DROPPING FROM 3600 TO 3200 WHILE MAKING TURNS WHEN SPRAYING WITH THE ACFT. TORQUE IS HAVING TO BE MONITORED AND INCREASED TO CARRY THE ACFT THROUGH A TURN. WORK PERFORMED ON ACFT TO DATE: CLOSING CHECK, FCU REPLACED, TRIM STSDR CA120710003Transmitter · malfunctioned(CAN) CREW NOTICED THE RT TORQUE GAUGE WAS STICKING AT 700 LBS AT TAKEOFF. LOW SPEED TAKEOFF WAS ABORTED. RT TORQUE TRANSMITTER WAS REPLACED WITH AN O/H UNIT AND CALIBRATED. SYSTEM WAS TESTED WITH NO FAULTS.SDR ERAA20120048Indicator · erraticNR 2 TORQUEMETER INOP, ABORTED TAKEOFF DUE TO ERRONEOUS TORQUE READING. REMOVED AND REPLACED NR 2 ENGINE TORQUE INDICATOR. OPS CHECK GOOD. REFERENCE AMM 77-10-00.SDR ERAA20120046Signal Cond Unit · defectiveDURING TAKEOFF AT 0739 TORQUE GAUGE INACCURATE. REMOVED AND REPLACED NR 2 ENGINE TSCU PW121 MM CHAPTER 72 OPS CHECKED GOOD AT ENGINE RUN IAW PSM 8-2-ER MIN CHECKOUT TABLE. OK FOR SERVICE.SDR CA120605004Indication Sys · malfunctioned(CAN) DURING CLIMB PASSING FL112, THE LT ENGINE TORQUE DROPPED FROM THE SET 72.3 PERCENT TO 62.6 PERCENT THEN RECOVERED. THE EVENT LASTED APPROXIMATELY 8 SECONDS SUBSEQUENT TROUBLESHOOTING LED TO THE REPLACEMENT OF THE TORQUE SENSOR AND AUTOFEATHER UNIT BEFOSDR SWIA201230826Signal Cond Unit · failedLEFT ENGINE NP DROPPED TO 43 PERCENT AFTER GEAR DOWN. (FLT 6243) REPLACED LEFT TORQUE SIGNAL CONDITIONER IN REFERENCE TO EMB 120 MM. P/N 30005-0000-52 S/N OFF 923SDR CA120605001Indication Sys · malfunctioned(CAN) DURING FLIGHT, THE CREW OBSERVED TORQUE FLUCTUATIONS UP TO 2 PERCENT. THE ENGINE WAS SHUTDOWN AND AN UNEVENTFUL SINGLE ENGINE LANDING FOLLOWED. POST FLIGHT TROUBLESHOOTING FOUND NO ANOMALIES. THE PROPELLER CONTROL AND AUTOFEATHER UNIT WERE REPLACED AS SDR CA120620003Indicator · fluctuates(CAN) TORQUE GAUGE FLUCTUATED. GAUGE REPLACED & CHECKED SERVICEABLE.SDR CA120423007Engine · fluctuates(CAN) AFTER TAKEOFF, THE CREW REPORTED ENGINE TORQUE FLUCTUATIONS OF 60 PERCENT. THEY ELECTED TO SHUT THE ENGINE DOWN BEFORE RETURNING TO THE DEPARTURE POINT WHERE AN UNEVENTFUL SINGLE ENGINE LANDING WAS ACCOMPLISHED. TROUBLESHOOTING IS ON-GOING. WILL INVESTSDR CA120411007Indication Sys · malfunctioned(CAN) DURING REVENUE FLIGHT, PILOT NOTICED UNCOMMANDED TORQUE DECAY ON 1 OF THE ENGINE. THE PILOT FELT A YAW AND THE ACFT SHUDDERED. PILOT ADVANCE POWER LEVER BUT WAS UNABLE TO RECUPERATE ENGINE TORQUE AND NOTICED TEMPERATURE INCREASE AT WHICH TIME HE SHUT TSDR CA120329002Sensor · failed(CAN) DURING CLIMB, THE CREW NOTICED TORQUE, NH AND NP INDICATION FLUCTUATIONS AND EXCEEDINGS. THE CAPTAIN ELECTED TO SHUT THE ENGINE DOWN AND AN UNEVENTFUL SINGLE ENGINE LANDING FOLLOWED. POST FLIGHT INSPECTION CHECKED AND CLEANED VARIOUS SENSORS AND CONNECSDR CA120227001Indication Sys · split(CAN) DURING SCHEDULED PRE-FLIGHT AUTO-FEATHER CHECKS, THE PILOTS REPORTED A TORQUE SPLIT OF 300 LB FT, NR 2 LAGGING. AFTER RETURNING TO THE RAMP, RETARDING & ADVANCING THE POWER LEVERS CLEARED THE DEFECT, BUT UPON SELECTING FEATHER THE NR 2 ENGINE FLAMED OUTSDR CA120218002Seal · leaking(CAN) ENGINE TORQUE WOULD NOT STAY AT 1865 RPM, ENGINE REMOVED FOR SHOP VISIT SUSPECT LEAK BY TORQUE SHAFT SEAL.SDR CA120125012Bridge · failed(CAN) DURING TAKEOFF ROLL THE LT TORQUE GAUGE WAS READING ZERO. TAKEOFF WAS ABORTED. MAINTENANCE WAS CONTACTED AND THEY FOUND THE NR 1 TORQUE RING BRIDGE HAD FAILED. SYS WAS SWITCHED OVER TO THE NR 2 BRIDGE AND CALIBRATED. GROUND RUNS CARRIED OUT AND ACFT RSDR CA120110004Limiter · leaking(CAN) TORQUE LIMITER UPPER FITTING CAP FOUND TO BE LOOSE CAUSING AN OIL LEAK. LOCKWIRE ON AFT ALLEN KEY SCREW FOUND BROKEN. LOCKWIRE HAD SEAL ON IT. LOCKWIRE WAS .020 AND SEEMED TO SMALL FOR LOCKING OF THE HARDWARE. ATTACHED IPC FIGURE TO SHOW WHICH PIECE WASDR CA120119003Signal Cond Unit · failed(CAN) APPLICATION OF TAKE OFF POWER - SLIGHT REDUCTION TO TRIM POWER REQUIRED ON NO.1 (96 TO 92%) ,SIMULTANEOUSLY FLICKER OF AUTOFEATHER ARM AND SELECT LIGHTS, SOUND LIKE A FEATHERING, SLIGHT SENSE OF YAW -SPIKE OFF TORQUE ON NR 2 (105% OBSERVED) AND PROP RPM SDR CA111205013Indicator · malfunctioned(CAN) WHEN STARTED ENGINES NR 2 TORQUE GAUGE STAYED STUCK AT 0. WITH ENGINES OFF TORQUE GAUGE WOULD TEST NORMAL. REPLACED NR 2 TORQUE GAUGE. ACFT PUT BACK INTO SERVICE. TORQUE GAUGE SENT OUT FOR REPAIR.SDR CA111114020Probe · faulty(CAN) DURING CRUISE, THE ENGINE HAD AN UNCOMMANDED POWER CHANGE ACCOMPANIED WITH ACFT YAW. THE ENGINE WAS SHUTDOWN AND THE CREW ATTEMPTED A RESTART BUT THE ENGINE REMAINED AT IDLE, AND AS SUCH IT WAS SHUTDOWN AGAIN. AN UNEVENTFUL SINGLE ENGINE FOLLOWED. POSSDR 2011FA0000598Bushing · unserviceableBUSHING, PN 31035921, SEPARATED FROM THE TORQUE SENSOR MAIN HOUSING PN 3103583-2 ALLOWING THE INTERMEDIATE BEARING AND DRIVE GEAR ASSY TO SHIFT FWD IN THE HSG. SPUR GEAR PN 3103406-2 CONTACTED THE MAIN HOUSING. SPUR GEAR, PN 3103406-2 CONTACTED THE MAIN HOUS
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