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.

SDR HNAA9698974Torque Sensor · failedFLT 3180, TPA TO PBI - AFTER TAKEOFF, POWER UPTRIM LIGHT FLICKERED ON, NR 1 TQ FLUXED PLUS OR MINUS 5 PERCENT, SECONDS LATER THE NR 2 PROP FEATHERED. NR 2 TQ WAS HIGH FOR TWO SECONDS BEFORE POWER WAS REDUCED. NR 2 ENGINE CONTINUED TO RUN WITH ALL OTHER INDICNov 1, 1996 · N989HA · Dhav DHC8201SDR 96ZZZX6149Tscu · failedFLT 3180, TPA TO PBI - AFTER TAKEOFF, POWER UPTRIM LIGHT FLICKERED ON, NR 1 TQ FLUXED PLUS OR MINUS 5 PERCENT, SECONDS LATER THE NR 2 PROP FEATHERED. NR 2 TQ WAS HIGH FOR TWO SECONDS BEFORE POWER WAS REDUCED. NR 2 ENGINE CONTINUED TO RUN WITH ALL OTHER INDICNov 1, 1996 · N989HA · Dhav DHC8201SDR RAIA961041Tq Sig Cond · malfunctionedSTL - FLT 7136 - FDAU TORQUE BUGS FLUCTUATED ON RIGHT ENGINE. ONLY AN INDICATION PROBLEM. MAINTENANCE REPLACED THE RIGHT TORQUE SIGNAL CONDITIONER. (M)Oct 30, 1996 · N421TE · Aerosp ATR42300SDR SWIA95770Torque Sensor · failedAT 2,300 FT, THE TORQUE GAUGE BECAME ERRATIC AND TWO SECONDS LATER THE LT ENGINE AUTO FEATHERED. REPLACED TORQUE SENSOR WITH SERVICEABLE UNIT, RAN ENGINE OPS CKS GOOD.Oct 27, 1996 · N235SW · Emb EMB120ERSDR 96ZZZM1519Torque Gauge · malfunctionedCLIMB-OUT OF FMN AT 1500 FEET, RIGHT ENGINE TORQUE SURGED FROM 500 TO 800 LBS. FEATHERED RIGHT ENGINE, RETURNED TO GATE AND NO FURTHER INCIDENT. COULD NOT DUPLICATE ON THE GROUND, SWAPPED TORQUE GAUGES AND PERFORMED TEST FLIGHT. TEST FLIGHT WAS SATISFACTORYOct 27, 1996 · N144YV · Beech 1900CSDR REXA96055Tq Indication · fluctuatedON TAKEOFF, LT ENG HAD ERRATIC TQ AND EGT IND. TQ FLUCTUATED FROM 100 PERCENT TO 70 PERCENT WITH EGT FLUCTUATING FROM 640 TO 500 WITH CORRESPONDING LOSS OF ENGINE PERFORMANCE LAST APPROX 5 MINUTES, THEN STABILIZED BY ITSELF APPROX 3 MINUTES LATER EGT FLUCTUATOct 20, 1996 · N309PX · Bag JETSTM3101SDR VTZA97032Ttl Valve · failedFLT 6494 - ROS-IAD - DURING DESCENT, MADE AN UNSCHEDULED LANDING DUE TO RIGHT ENGINE TORQUE, RPM AND EGT FELL OFF. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED TTL VLV. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVEOct 16, 1996 · N477UE · Bag JETSTM3201SDR HEEA968270Torquemeter · out of specsINDICATES READING 2% HIGHER THAN MANUFACTURER'S SPECS. TIME SINCE REPAIR 0:00.Oct 14, 1996 · Bell 206L3SDR HNAA9699270Torque Probe · failedFLL/TPA - FLT 3438 - ON TAKEOFF ROLL, THE NR 2 AUTOFEATHER ACTIVATED. THE TAKEOFF WAS ABORTED AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED THE NR 2 ENGINE TORQUE PROBE AND TORQUE SENSOR CONTROL UNIT (TSCU). REFERENCE: OPERATOR COOct 13, 1996 · N992HA · Dhav DHC8201SDR 96ZZZX5927Tscu · failedFLL/TPA - FLT 3438 - ON TAKEOFF ROLL, THE NR 2 AUTOFEATHER ACTIVATED. THE TAKEOFF WAS ABORTED AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. REMOVED AND REPLACED THE NR 2 ENGINE TORQUE PROBE AND TORQUE SENSOR CONTROL UNIT (TSCU). REFERENCE: OPERATOR COOct 13, 1996 · N992HA · Dhav DHC8201SDR HEEA968236Torquemeter · sticksTORQUEMETER STICKS AT 75-80%.Oct 11, 1996 · N31077 · Bell 206L3SDR HEEA968230Torquemeter · reads lowTORQUMETER LOW, OUT OF TOLERANCE AT 100% AND ABOVE.Oct 11, 1996 · N3107N · Bell 206L3SDR HEEA968210Torquemeter · defectiveENGINE TORQUE GAUGE FLUCTUATES.Oct 10, 1996 · N206FS · Bell 206L3SDR HEEA968206Transmitter · reads highTORQUE READS 4% HIGH.Oct 10, 1996 · N60951 · Snias AS350B2SDR RAIA961012Tq Signal Cond · out of adjustMRY - FLT 4760 - RIGHT ENGINE WOULD NOT PRODUCE TARGET TORQUE. MAINTENANCE ADJUSTED THE TORQUE SIGNAL CONDITIONER. (M)Oct 8, 1996 · N859AE · Bag JETSTM3201SDR RAIA961009Torque Ring · failedLAX - FLT 4790 - LEFT ENGINE DID NOT RESPOND TO POWER LEVER CONTROL INPUTS. ENGINE WAS SHUTDOWN. MAINTENANCE REPLACED THE LEFT ENGINE TORQUE RING. (M)Oct 6, 1996 · N864AE · Bag JETSTM3201SDR HEEA968018Indicator · defectiveINDICATOR IS CAUSING NUMBER 1 TORQUE CIRCUIT BREAKER TO POP.Oct 3, 1996 · N3893S · Bell 412SDR HEEA968017Indicator · defectiveTORQUE METER #2 WILL NOT GO BELOW 35%.Oct 3, 1996 · N107X · Bell 412SDR HEEA968012Transmitter · defectiveGAUGE FLUCTUATES AND PEGS OUT.Oct 3, 1996 · N4000L · Snias AS350B2SDR 97ZZZX526Sensor Body · brokenDURING THE AFTER TAKEOFF CLIMB, AND IMMEDIATELY AFTER GEAR RETRACTION THE ENGINE FLAMED OUT. THE TORQUE SENSOR BODY FAILED AROUND THE DRIVE GEAR FOR THE FUEL CONTROL UNIT AND AROUND THE RETAINING BOLTS. ONE TORQUE SENSOR RETAINING BOLT WAS FOUND AT THE BOTTOSep 28, 1996 · N618BB · Mtsbsi MU2B30SDR 96ZZZX5929Tq Probe · malfunctionedNR 1 TORQUE GAUGE WENT FROM 92 PERCENT TO ZERO. POWER UPTRIM WAS CYCLING ON AND OFF. REMOVED AND REPLACED NR 1 ECU, TSCU, AND TORQUE PROBE. GROUND RUN AND TEST FLIGHT PROVED SATISFACTORY. A/C RETURNED TO SERVICE. REFERENCE: OPERATOR CONTROL NR PCAA96003Sep 28, 1996 · Dhav DHC8102SDR 96ZZZX5928Tq Sig Cond Unit · malfunctionedNR 1 TORQUE GAUGE WENT FROM 92 PERCENT TO ZERO. POWER UPTRIM WAS CYCLING ON AND OFF. REMOVED AND REPLACED NR 1 ECU, TSCU, AND TORQUE PROBE. GROUND RUN AND TEST FLIGHT PROVED SATISFACTORY. A/C RETURNED TO SERVICE. REFERENCE: OPERATOR CONTROL NR PCAA960031Sep 28, 1996 · Dhav DHC8102SDR CA961002014Tq Signal Cond · faulty(CAN) JUST AFTER TAKEOFF, DURING CLIMB OUT AT APPROXIMATELY 600 FEET WITH BOTH ENGINES AT 90 PERCENT TORQUE, THE #2 ENGINE HAD A UNCONTROLLABLE AUTOFEATHER WITH AN UPTRIM TO 105 PERCENT ON #1 ENGINE, #2 ENGINE OVERTORQUED TO 125 PERCENT FOR APPROXIMATELY 20 SESep 24, 1996 · Dhav DHC8311SDR COMA9610284Tq Sig Cond · malfunctionAUTO FEATHER WARNING DURING TAKEOFF. REPLACED THE LT ENGINE TORQUE SIGNAL CONDITIONER.Sep 20, 1996 · N267CA · Emb EMB120RTSDR HEEA967822Indicator · fluctuationTORQUE FLUCTUATION, INTERMITTENT HIGH SIDE.Sep 12, 1996 · N4000L · Snias AS350B2SDR VTZA96352Ttl Valve · dirtyFLT 6182 - IAD-SCY - ABORTED TAKEOFF, DUE TO LEFT ENGINE TTL LIGHT ILLUMINATED. MAINTENANCE CLEANED WATER AND OIL FROM CANNON PLUG, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)Sep 7, 1996 · N481UE · Bag JETSTM3201SDR VTZA96358Tq Signal Cond · failedFLT NR 6339 - IAD-EWR - ABORTED TAKEOFF, DUE TO LEFT ENGINE WOULD NOT MAKE TAKEOFF TORQUE, ALSO OIL TEMP AND PRESSURE FLUCTUATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED TORQUE SIGNAL CONDITIONER, OPS CHECK OK. Sep 6, 1996 · N494UE · Bag JETSTM3201SDR VTZA96356Ttl System · malfunctionedIAD/PHL - DURING TAKEOFF AT 1340 HOURS ON 9-6-96, ABORTED TAKEOFF DUE TO TTL ROLLED BACK TO 80 PERCENT. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENT. MAINTENANCE OPENED DMI 06518, MEL 76-2. MAINTENANCE CLOSED DMI 06518 ON 9-7-96 BY PERFORMING OPS CHECSep 6, 1996 · N488UE · Bag JETSTM3201SDR VTZA96353Ttl Valve · dirtyFLT 6435 - IAD-RDU - ABORTED TAKEOFF DUE TO BOTH RIGHT AND LEFT ENGINE NOT MAKING REQUIRED TAKEOFF TORQUE. MAINTENANCE CLEANED WATER AND OIL FROM TTL CANNON PLUG, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)Sep 6, 1996 · N473UE · Bag JETSTM3101SDR CA970311016Torque Control · faulty(CAN) 25 PERCENT TORQUE SPLIT. #1 ENGINE 3-4 PERCENT LOW N1, 50-70 DG LOW.Sep 6, 1996 · Bell 212SDR VTZA96345Tq Signal Cond · out of adjustIAD/HVN - FLT 6173 - DURING TAKEOFF AT 1840 HOURS ON 9-4-96, ABORTED TAKEOFF DUE TO NR 2 ENGINE TORQUE ROLLED BACK ON TAKEOFF. AIRCRAFT LANDED AND RETURNED TO GATE AT IAD WITH NO FURTHER INCIDENT. MAINTENANCE ADJUSTED NR 2 TORQUE SIGNAL CONDITIONER, OPS CHECSep 4, 1996 · N483UE · Bag JETSTM3201SDR HEEA967770Indicator · failedTORQUEMETER #1 NEEDLE HAS NO INDICATION.Sep 3, 1996 · N1079U · Bell 212SDR 9618921145Tt2 Sensor · failedDURING TAXING OUT, THE NR 1 ENGINE EXPERIENCED COMPRESSOR STALL AND VIBRATION. AS THE NR 1 ENGINE EGT CLIMBED TO 750 DEGREES, THE CREW FOLLOWED COM PROCEDURE, SHUT DOWN THE ENGINE, AND RETURNED TO THE GATE WITHOUT FURTHER INCIDENT. REPLACED TT2 SENSOR, LEAK Sep 1, 1996 · N145US · Doug DC1040SDR RAIA960828Connector · oil soakedALO - FLT 7415 - LEFT ENGINE WAS SMOKING FROM TAILPIPE DURING TTL TEST. MAINTENANCE CLEANED OIL FROM THE LEFT BYPASS VALVE CANNON PLUG. PERFORMED GROUND RUNS, OPS CHECK GOOD. (M)Aug 28, 1996 · N433AM · Bag JETSTM3201SDR RAIA960824Connector · dirtyFWA - FLT 7509 - LEFT ENGINE DID NOT MAKE TORQUE. PERFORMED GROUND RUNS, MADE TORQUE WITH THE TTL TURNED OFF. MAINTENANCE CLEANED OIL FROM THE BYPASS VALVE CANNON PLUG. (M)Aug 20, 1996 · N433AM · Bag JETSTM3201SDR WTAA960165Tq Signal Cond · failedSBP - NO TORQUE INDICATION ON RIGHT INDICATORS ON TAKEOFF ROLL. TAKEOFF ABORTED WITHOUT INCIDENT. AIRCRAFT FERRIED TO FAT FOR MAINTENANCE. MAINTENANCE REPLACED RIGHT ENGINE TORQUE SIGNAL CONDITIONER. ENGINE GROUND RUN NORMAL. AIRCRAFT RETURNED TO SERVICE.Aug 18, 1996 · N251YV · Emb EMB120RTSDR BSAA081996Tq Indicator · failedBIL-OLF - RIGHT TORQUE INDICATION BECAME ERRATIC. TORQUE INDICATOR FAILING. REPLACED RIGHT TORQUE INDICATOR, SETUP, AND OPERATIONAL CHECKED OK. RELEASED FOR SERVICE. (M)Aug 16, 1996 · N115BS · Swrngn SA226TCSDR REXA96039Tq Sig Cond · driftingLEFT TORQUE GAUGE READS NO LOWER THAN 22 PERCENT TORQUE AT GROUND IDLE, NO THRUST 20 PERCENT AT SHUTDOWN. SWAPPED TO BRIDGE NR 1 ON RIGHT SIGNAL CONDITIONER AND CALIBRATED IAW JS MM 72-00. GOOD FOR SERVICE. (M)Aug 13, 1996 · N319PX · Bag JETSTM3101SDR MVH0064099Transmitter · failedTORQUE TRANSMITTER SHORTED INTERNALLY.Jul 30, 1996 · N63CF · Aerosp SA365NSDR MVH0064096Transmitter · reads lowTORQUE TRANSMITTER READS LOW.Jul 29, 1996 · N63CF · Aerosp SA365NSDR WTAA960151Connector · dirtySEA - LEFT ENGINE SURGING 30 PERCENT TORQUE ON TAKEOFF ROLL. TAKEOFF ABORTED WITHOUT INCIDENT. MAINTENANCE ADJUSTED COMPENSATING RESISTOR AND CLEANED TORQUE RING CANNON PLUG. NO DISCREPANCIES NOTED ON GROUND RUN. AIRCRAFT RETURNED TO SERVICE. (M)Jul 26, 1996 · N103XV · Bag JETSTM3101SDR VTZA96276Tq Signal Cond · out of adjustFLT NR 6521 - IAD-BDL - ABORTED TAKEOFF DUE TO NR 2 ENGINE ONLY MAKING 90 PERCENT TORQUE (95 PERCENT TARGET). AIRCRAFT RETURNED TO GATE AT IAD WITH NO FURTHER INCIDENTS. MAINTENANCE RECALIBRATED TORQUE SIGNAL CONDITIONER, OPS CHECK OK. AIRCRAFT WAS RELEASEDJul 25, 1996 · N478UE · Bag JETSTM3201SDR CA970311021Indicator · intermittent(CAN) TORQUEMETER BEGAN TO OPERATE INTERMITTENTLY THEN BLEW A FUSE AND QUIT.Jul 24, 1996 · Snias AS350BSDR AU960999Pipe · cracked(AUS) ENGINE TORQUE SYSTEM ALUMINIUM PIPE CRACKED AND LEAKING - AIRCRAFT IMPORTED FROM SOUTH AFRICAJul 22, 1996 · Bell 206BSDR GLBA96160Tq Sig Cond · dirtyOSH - LEFT ENGINE TORQUE GAUGE FLUCTUATED ABOUT 7 PERCENT THEN DROPPED TO LESS THAN 20 PERCENT TORQUE. CAUSED AUTOFEATHER ON LEFT ENGINE. MAINTENANCE INSPECTED AND CLEANED CANNON PLUG ON TORQUE SIGNAL CONDITIONING UNIT AND PCU, NG. OPERATIONAL CHECK OK, HIGJul 20, 1996 · N299UX · Emb EMB120ERSDR RAIA960717Tq Signal Cond · out of adjustSTL - FLT 7330 - RIGHT ENGINE WOULD NOT PRODUCE TARGET TORQUE. MAINTENANCE ADJUSTED THE RIGHT TORQUE SIGNAL CONDITIONER. PERFORMED GROUND RUNS. (X)Jul 19, 1996 · N339TE · Bag JETSTM3201SDR VTZA96280Ttl Vlv · failedFLT NR 6177 - IAD-PIT - ABORTED TAKEOFF DUE TO LEFT ENGINE TORQUE DROPPED AND THEN SURGED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE DEFERRED TTL, OPENED DMI 42445, MEL 76-20. MAINTENANCE CLOSED DMI 42445 ON 7-25-96 BY REPLACING TTL VJul 18, 1996 · N494UE · Bag JETSTM3201SDR RAIA960712Tq Signal Cond · out of adjustSTL - FLT 7061 - LEFT ENGINE WOULD NOT PRODUCE TARGET TORQUE. MAINTENANCE ADJUSTED THE LEFT TORQUE SIGNAL CONDITIONER. (X)Jul 18, 1996 · N434AM · Bag JETSTM3201SDR MALA965076Tq Pickup Probe · failedFLT NR 3389 - ON CLIMB-OUT FROM DTW, THE LEFT ENGINE EXPERIENCED A 20 PERCENT POWER LOSS. THE AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED A TORQUE PICKUP PROBE. ALL CHECKS SATISFACTORY. (M)Jul 18, 1996 · N865MA · Dhav DHC8102SDR VTZA96261Tq Signal Cond · failedFLT NR 6363 - LYH-IAD - ABORTED TAKEOFF DUE TO LEFT ENGINE WOULD NOT MAKE REQUIRED TAKEOFF TORQUE. AIRCRAFT RETURNED TO GATE WITH NO FURTHER INCIDENTS. MAINTENANCE REMOVED AND REPLACED TORQUE SIGNAL CONDITIONER AND PERFORMED RECOMPUTATION OF LEFT ENGINE. OPJul 15, 1996 · N470UE · Bag JETSTM3201
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