JASC 7714

Service difficulty reports · 1,357

Reports filed under 7714 · Engine RPM Indicating System, 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 = '7714'
  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 QR9R2026082100001Sensor · failedIN FLIGHT NR NEEDLE ON TRIPLE TAC FAILED. IN FLIGHT NR FLUCTUATED CONTINUOUSLY BETWEEN NORMAL RANGE AND 0 WITH ASSOCIATED LIGHT AND WARNING TONES. REMOVED AND REPLACED SPEED PICK-UP SENSOR IAW AMM 62-41-00, 4-1. MOC SUCCESSFULLY COMPLETED.Aug 21, 2026 · Bolkms BK117C2SDR QR9R2026081100001Sensor · failedOVSP SYSTEM 1 FAILED DURING START RUN-UP. MAINTENANCE ARRIVED AND PULLED CB AND CAUTION LIGHT WAS STILL ILLUMINATED AFTER RESETTING CB. DURING TROUBLESHOOTING, FOUND #1 ENGINE OVERSPEED SENSOR BAD. PINS 1-2 OP AND PINS 4-5 HIGH RESISTANCE. REMOVED AND REPLACEDAug 11, 2026 · Bolkms BK117C2SDR DALA2026080704581Pressure Sensor · faultedDIVERTED TO DTW DUE TO RIGHT ENGINE FAULT WITH ASSOCIATED N1 ERRATIC AND N1 DROP. REPLACED BURNER PRESSURE SENSOR PER A220 AMP 73-21-23. REPLACED HARNESS W04 PER A220 AMP 73-21-64. REPLACED EEC PER A220 AMP 73-21-01. (LP 8423746 - AIRCRAFT WAS GROUNDED)Aug 7, 2026 · N120DU · Airbus BD5001A10SDR QR9R2026073000001Sensor · faultyON TAKEOFF, ROTOR RPM WARNING LIGHT AND NRO NEEDLE ON TRIPLE TACH WENT TO ZERO. REMOVED AND REPLACED ROTOR RPM SENSOR IAW AMM 63-21-00, 5-1.Jul 30, 2026 · Bolkms BK117C2SDR QMLA2026072520049Dual Tachometer · degradedNEEDLES ON DUAL TACH NOT ALIGNED WHILE RUNNING. FADEC DEGRADED/RESTART FAULT LIGHT ILLUMINATED AFTER STARTUP. REMOVED AND REPLACED DEFECTIVE DUAL TACH GAUGE.Jul 23, 2026 · N404LL · Bell 407SDR QR9R2026071500001Sensor · failedOVERSPEED CAUTION LIGHT ILLUMINATED DURING START RUN-UP. REMOVED AND REPLACED #2 ENGINE OVERSPEED SENSOR IAW EMM 77-14-00-900-802-A01.Jul 15, 2026 · Bolkms BK117C2SDR UIEA2026060900455Circuit Card · faultedRAT DEPLOYED RIGHT AFTER ROTATION ON TAKE-OFF. GREEN PRESSURE LIGHT ILLUMINATED(<P>REMOVED AND REPLACED LH ENG SPEED CARD & STOWED RAT PER AMM 73-21-54. NO FURTHER DEFECTS NOTED</P>)Jun 9, 2026 · N649GT · Boeing 767375SDR QR9R2026051300001Sensor · out of toleranceENG 1 OVERSPEED ON CAD. PULLING THE BREAKER MADE IT GO AWAY, PUTTING THE BREAKER BACK IN MADE IT COME BACK ON. WHEN GOING TO IDLE AND BACK TO FLIGHT IT GOES AWAY, COMES BACK ON AT A HOVER. DURING TROUBLESHOOTING, FOUND #1 ENGINE OVERSPEED SENSOR BAD, READS OUTMay 13, 2026 · Bolkms BK117C2SDR CALA2026041715440Sensor · faultedRIGHT ENG ANALOG N2 STATUS MSG DISPLAYED DEBRIEFED CREW. CREW STATED AFTER TAKE OFF INTO CRUISE THEY NOTICED RIGHT ENG BLEED LIGHT OFF LIGHT ILLUMINATED. QRH WAS PERFORMED WITH NO HELP. SHORTLY AFTER RIGHT CTR FUEL PUMP LIGHT ILLUMINATED WITH NO OTHER ALERTS. Apr 15, 2026 · N67052 · Boeing 767424ERSDR QR9R2026032400002Sensor · failed#1 OVSP FAIL CAUTION ILLUMINATED AFTER RUN-UP. REMOVED AND REPLACED #1 ENG OVERSPEED SENSOR IAW EMM 77-14-00-900-802-A01. MOC C/W, NO FAULTS NOTED.Mar 24, 2026 · Bolkms BK117C2SDR 2026FA0000186Quick Disconnect · defectiveWHILE IN FLIGHT THE LEFT ENGINE RPM READING BECAME ERRATIC, GOING FROM NORMAL TO PAST RED LINE QUICKLY BACK AND FORTH. PIC PRECAUTIONARY SHUT DOWN ENGINE AND RETURNED TO HOME FIELD. AFTER TROUBLESHOOTING IT WAS FOUND THE LEFT HAND TACH GENERATOR SENSOR PLASTICMar 11, 2026 · N8024Q · Piper PA44180SDR QMLA2026012720006Sensor · inoperativeNUMBER 2 ENGINE OVSP FAIL DID NOT EXTINGUISH.Jan 27, 2026 · N984ME · Bolkms BK117C2SDR QR9R2026011300001Sensor · failed#2 ENGINE OVERSPEED FAIL LIGHT CAME ON AT 0.2 HRS AT HOVER. A TEST FLIGHT EVAL FOUND #2 ENGINE OVERSPEED FAIL CAUTION LIGHT ILLUMINATED 6 MINUTES INTO THE GROUND RUN. REMOVED AND REPLACED OVERSPEED SENSOR IAW EMM 77-14-00-900-802-A01. MOC SUCCESSFULLY COMPLETEJan 13, 2026 · Bolkms BK117C2SDR QR9R2025092400001Sensor · failedOVSP ON #1 ENGINE WOULD NOT GO OUT AFTER STARTING ENGINE. REMOVED AND REPLACED OVERSPEED SENSOR IAW 77-14-00-900-802. T/P MOC SUCCESSFULLY COMPLETED IAW 05-60-00, 6-1.Sep 24, 2025 · Bolkms BK117C2SDR QR9R2025080100001Sensor · failed#2 OVERSPEED FAIL CAUTION REPEATEDLY APPEARED DURING HOVER AND AT FLIGHT. REMOVED AND REPLACED #2 ENG OVERSPEED SENSOR IAW MM 77-14-00-802-A01. T/F SUCCESSFULLY COMPLETED IAW AMM 05-60-00, 6-12.Aug 1, 2025 · Bolkms BK117C2SDR QR9R2025072400002Sensor · failedOVERSPEED FAIL CAUTION ON #2 ENG CAME ON APPROXIMATELY 1 MINUTE AFTER START. DURING TROUBLESHOOTING, FOUND PINS 4 AND 5 OF THE #2 OVERSPEED SENSOR CONNECTOR TO READ OPEN. PINS 2 AND 3 READ CORRECTLY. REMOVED AND REPLACED MAGNETIC SENSOR IAW ENGINE MANUAL TASK Jul 24, 2025 · Bolkms BK117C2SDR QR9R2025072300002Sensor · failedENG 1 OVSP FAIL CAUTION DURING HOVER TAXI. REMOVED AND REPLACED #1 ENGINE OVERSPEED SENSOR. COMPLETED OVERSPEED TEST IAW AMM 05-60-00, 6-1 AND 77-14-00-900-802-A01.Jul 23, 2025 · Bolkms BK117C2SDR 8HBR20250721071Shaft · defectiveTACHOMETER CABLE ORDERED NEW FROM TEXTRON, PN: S2550-12, RECEIVED WITH METAL END OF TACHOMETER SHAFT THAT CONNECTS TO THE TACHOMETER, SEPARATING FROM RUBBER SHAFT THAT IT WAS SWAGED TO. METAL END CONNECTOR SHOWS INDICATIONS OF SWAGING, HOWEVER RUBBER DOES NOT,Jul 13, 2025 · CessnaSDR CALA2025070306203Sensor · faultedAFTER TAKEOFF DURING INITIAL CLIMBS THE LEFT BLEED OFF LIGHT AND ASSOCIATED PACK OFF LIGHT ILLUMINATED. WE FOLLOWED THE QRH PROCEDURE AND WERE UNABLE TO RESET IT. AFTER CONTACTING TOMC A SECOND ATTEMPT WAS MADE AT 1.22 EPR AND STILL NOT RESET. REFERENCE: 36-10Jun 30, 2025 · N57111 · Boeing 757224SDR VGCA20250513001Tach Generator · strippedRIGHT ENGINE RPM SPOOLED DOWN IN FLIGHT. ENGINE WAS SHUTDOWN. SUBSEQUENT INSPECTION FOUND THAT TACH GENERATOR DRIVE SHAFT WAS SPRIPPEDMay 13, 2025 · N391FL · Cvac STC3405800SDR QR9R2025050900001Sensor · failed#1 ENGINE OVERSPEED FAIL CAUTION CAME ON IN FLIGHT. DURING TROUBLESHOOTING, FOUND OVERSPEED SENSOR BAD. FAILS TESTS IN ENGINE MANUAL 77-14-00-750-801-A01. COIL READS OPEN ON PINS 4 AND 5. REMOVED AND REPLACED OVERSPEED SENSOR IAW ENGINE MANUAL TASK 77-14-00-75May 9, 2025 · Bolkms BK117C2SDR 37CA2025/02/2601Tach Generator · defectiveN1 TACHOMETER GENERATOR ERRATIC READINGS DURING START UP CAUSING A MIS-COMPARE P CAUTION MESSAGE.Feb 20, 2025 · N354LL · Agusta AW119MKIISDR CALA2025021302309Tachometer · faultedN1 OVERSPEED INDICATION NUMBER 2 ENGINE N1 OVERSPEED BEGAN DURING CLIMB AT 15,000FT . DURING APPROACH BACK EPR WENT BLANK. PILOTS REDUCED THROTTLE TO MATCH N1. AT DECENT ALL PERIMETERS WERE WITHIN LIMITS.Feb 9, 2025 · N57869 · Boeing 75733NSDR QR9R2025011700002Sensor · failed#2 OVSP FAIL CAUTION ILLUMINATED AND WOULD NOT EXTINGUISH WITH AVIONICS RESETTING CB OR DOING HARD RESET. REMOVED AND REPLACED #2 ENGINE MAGNETIC SENSOR IAW ENG MANUAL 77-14-00-900-802-A01.Jan 17, 2025 · Bolkms BK117C2SDR QR9R2025011500001Sensor · intermittent#2 ENG OVSP FAIL LIGHT ILLUMINATED IN FLIGHT. A MAINTENANCE TEST FLIGHT VERIFIED #2 ENG OVSP FAIL LIGHT WAS INTERMITTENT. CAUTION LIGHT CAME ON APPROXIMATELY 2 MINUTES INTO FLIGHT AND THEN WENT OUT DURING HOVER TO PARKING. REMOVED AND REPLACED DOUBLE SENSOR IAJan 15, 2025 · Bolkms BK117C2SDR ABXA20241229274Circuit Card · malfunctionedAFTER PUSHBACK, STATUS MSG L ENG SPEED CARD AC RETURNED TO GATE (BTB)AND MTX GROUNDED ACMTX PERFORMED STATUS MSG ERASE PROCEDURES IAW B767 AMM 31-41-00, NO MSG AT THIS TIME.MTX RETURNED AC TO SERVICE.Dec 29, 2024 · N1499A · Boeing 767328SDR QR9R2024111400002Sensor · faultedDURING FLIGHT, #1 ENG OVERSPEED FAILURE CAUTION ILLUMINATED ON THE CAD AND WOULD NOT GO OUT. DURING TROUBLESHOOTING, FOUND PINS 2-3 READ OPEN ON CONTINUITY TEST. SHOULD READ 110 OHMS, +/- 15 OHMS. REMOVED AND REPLACED OVERSPEED SENSOR IAW ENGINE MANUAL 77-14-0Nov 14, 2024 · Bolkms BK117C2SDR QR9R2024101800001Sensor · failedOVSP FAIL LIGHT DID NOT EXTINGUISH UPON STARTING. REMOVED AND REPLACED #2 ENGINE OVERSPEED SENSOR IAW EMM 77-14-00-900-802-A01.Oct 18, 2024 · Bolkms BK117C2SDR QR9R2024101000002Sensor · faultedIN FLIGHT, #2 ENGINE OVERSPEED FAIL LIGHT ILLUMINATED. REMOVED AND REPLACED OVERSPEED SENSOR IAW ENG MANUAL 77-14-00-900-802-A01. MOC SUCCESSFULLY COMPLETED.Oct 10, 2024 · Bolkms BK117C2SDR QR9R2024091300004Sensor · warning light#2 OVSP FAIL CAUTION LIGHT ILLUMINATED DURING HOVER FLIGHT AND WAS ON AND OFF INTERMITTENTLY WITH BOTH TWIST GRIPS IN THE FLIGHT POSITION AND AIRSPEED LESS THAN 5 KIAS. REMOVED AND REPLACED DOUBLE SENSOR IAW ARRIEL 1 E2 77-14-00-900-802-A01. T/P MOC SUCCESSFULSep 13, 2024 · Bolkms BK117C2SDR QR9R2024091300003Sensor · failed#1 ENG OVERSPEED FAIL CAME ON DURING HOVER TAXI. A TEST FLIGHT EVAL FOUND THAT AFTER 5 ATTEMPTS ON RESETTING #1 ENGINE OVERSPEED LIGHT CB, LIGHT WOULD NOT EXTINGUISH. REMOVED AND REPLACED OVERSPEED SENSOR IAW EMM 77-14-00-900-802-A01. MOC COMPLETED OK.Sep 13, 2024 · Bolkms BK117C2SDR QR9R2024080900003Indicator · inoperativeDURING RUN-UP, NR INOP ON TRIPLE TACH. REMOVED AND REPLACED TRIPLE INDICATOR IAW AMM 62-41-00, 4-3. MOC SUCCESSFULLY COMPLETED.Aug 9, 2024 · Bolkms BK117C2SDR QR9R2024080800001Tachometer · fluctuatesN2 NEEDLE #2 ENGINE KEEPS FLUCTUATING BETWEEN 0 AND FLIGHT DURING FLIGHT. REMOVED AND REPLACED TRIPLE INDICATOR RPM; MOC SUCCESSFULLY COMPLETED IAW AMM 05-60-00, 6-12.Aug 8, 2024 · Bolkms BK117C2SDR CALA2024080700383Sensor · faultyINFLIGHT RT ENGINE BLEED OFF. RT CTR FUEL PUMP INOP. RT ENGINE N3 INDICATING 0 REMOVED AND REPLACED E2 TACHOMETER REF 77-12-02 AND FIM 77-12-805 PARTS USED: 19-7712-9-9001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1928849 SN OFF 7761. INFLIGHT RT ENAug 5, 2024 · N17139 · Boeing 757224SDR NACA2024080400001Circuit Card · failedL ENGINE SPEED CARD. REMOVED AND REPLACED LEFT ENGINE SPEED CARD IAW AMM 77-12-01 TEST REPORTED OKAug 4, 2024 · N566NC · Boeing 7673BGSDR FDEA202407251050Tach Generator · failedAFTER TAKEOFF, RECEIVED L ENG BLEED OFF EICAS RAN QRH 2.1.14 LEVELED AT FL360. NOTICED CABIN ALT AT 8000 WHILE 5 MIN CABIN ALT AT 9500 DESCENDED DOWN TO LOWER ALT IN DESCENT RECEIVED CABIN ALT HIGH MASTER WARNING AND EICAS MSG. RAN QRC THEN QRH 2.1.1 CONTIJul 25, 2024 · N944FD · Boeing 7572G5SDR ABXA20240619120Sensor · malfunctionedLEFT ENG SPEED CARD MESSAGE DURING TAXI. AC RETUREND TO GATE MAINTENANCE GROUNDED AC AND RANG OUT N2 SPEED SENSOR IAW WDM 73-21-18 AND 77-12-12 FOUND LEFT T41 N2 SPEED SENSOR SHORTED TO GROUND INTERNALLY. REMOVED AND REPLACED SAME IAW B767 AMM 77-12-02. OPS, BJun 19, 2024 · N390CM · Boeing 767338SDR CALA2024030800663Sensor · faultyCLIMBING THROUGH 13000 FELT SHARP BUMP THEN VIBE IN AIRFRAME..EGT SPIKED AND N1 ROLLBACK INCREASED NORMALLY, HOWEVER, NOTICEABLE VIBRATIONS RETURNED AND FELT THROUGH CABIN. DURING FA DEBRIEF, PAX NOTICED SPARKS/SMALL FLAMES FROM E1 EXHAUST. DEBRIEF CREW: NORMAMar 5, 2024 · N31412 · Boeing 737924SDR QR9R2024022000002Tachometer · failedUPON STARTING #1 ENGINE, ROTOR RPM NEEDLE MOVED UP TO APPROXIMATELY 97% AND STUCK IN THAT POSITION. N2 AND ROTOR RPM NEEDLES WERE NOT MATCHED. ABORT PROCEDURES WERE CONDUCTED. REMOVED AND REPLACED TRIPLE INDICATOR RPM (NVIS) IAW 62-41-00, 4-3.Feb 20, 2024 · Bolkms BK117C2SDR QR9R2023102300001Tachometer · failedTRIPLE TACH WENT TO ZERO DURING FLIGHT. ALL OTHER INDICATIONS HAD RTR AND N2S WITHIN THE NORMAL OPERATING RANGE. REMOVED AND REPLACED TRIPLE INDICATOR RPM IAW 77-14-00, 4-1; TESTFLIGHT SUCCESSFULLY COMPLETED.Oct 23, 2023 · Bolkms BK117C2SDR YV3R2023051000565Controller · defectiveCUSTOMER REPORTED GOVERNOR CONTROLLER ASSEMBLY P/N: B286-2 WAS DEFECTIVE.Apr 26, 2023 · Robsin R22BETAIISDR YV3R2023042700563Controller · defectiveCUSTOMER REPORTED CONTROLLER ASSEMBLY P/N: D278-2 OVER SPEEDS ENGINE AND ROTOR SYSTEM.Apr 20, 2023 · N276RC · Robsin R44RAVENIISDR DALA2023041803076Unknown · unknownSHIP 6811 - ATB - RETURNED TO JFK DUE TO RIGHT BLEED OFF WITH ASSOCIATED RIGHT PACK OFF MESSAGE. ALSO HAD RIGHT CENTER FUEL PUMP INOP. CORRECTIVE ACTION: REMOVED AND REPLACED N2 SPEED CARD AND RIGHT ENGINE PMA ROTOR/STATOR ASSY.Apr 15, 2023 · N705TW · Boeing 757231SDR YV3R2023031400551Controller · defectiveCUSTOMER REPORTED CONTROLLER ASSEMBLY P/N: D278-2 GIVING A HIGH READING OF MORE THAN 101% RPM.Jan 4, 2023 · Robsin R44RAVENIISDR YV3R2023031400549Controller · malfunctionedCUSTOMER REPORTED CONTROLLER ASSEMBLY P/N: D278-2 MALFUNCTIONED.Dec 15, 2022 · Robsin R44RAVENIISDR 2022F00516Tach Generator · seizedTHE LH TACH GENERATOR SEIZED INTERNALLY CAUSING THE LH TACHOMETER INDICATION TO FALL TO ZERO.Dec 13, 2022 · N157SG · Cessna 340CESSNASDR HALA2022121300309Sensor · faultedECAM IN AIR "ENG 2 FADEC SYS FAULT" PER FPR ENG 2B-0452-N2 SPEED SENSOR FAIL. PERFORMED T/S IAWTSM 77-11-00-810-812-A. DURING FAULT CONFIRM IAW CHART NO ASSOCIATED MESSAGES. DURING ENG START UP ECAM WARNING AF ABORTED START DUE TO BOWED MOTOR OVERSPEED. PERDec 12, 2022 · N214HA · Airbus A321271NSDR QR9R2022120800001Tachometer · faultyABORTED TAKE-OFF DUE TO ROTOR TACH FAILURE. ROTOR NEEDLE DID NOT MOVE ON FIRST ENGINE START. UPON TROUBLESHOOTING, NR SPEED SYSTEM FOUND TRIPLE TACH R NEEDLE FAILS TO SELF-TEST, NEEDLE IS STUCK. REPLACED TRIPLE TACH INDICATOR IAW AMM 62-41-00, 4-2. MOC SUCCESSDec 8, 2022 · Bolkms BK117C2SDR QR9R20220912001Sensor · faulted#2 OVERSPEED FAIL CAUTION ILLUMINATED DURING RUN-UP. REMOVED AND REPLACED ENG #2 OVERSPEED SENSOR I/A/W 77-14-00-900-802-A01. TEST FLIGHT SUCCESSFULLY COMPLETED IAW AMM 05-60-00, 6-12.Sep 12, 2022 · Bolkms BK117C2SDR QR9R20220831003None · illuminatedOVERSPEED FAIL LIGHT ILLUMINATED DURING FLIGHT ON #2 ENGINE. DURING LANDING, #2 ENGINE OIL PRESSURE VACILLATED BETWEEN 05 TO 1.9. A TEST FLIGHT EVALUATION REVEALED #2 OVERSPEED FAIL CAUTION ADVISORY WOULD NOT GO OUT DURING START UP. REPLACED # 2 ENGINE OVERSPEAug 31, 2022 · Bolkms BK117C2
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