JASC 2421

Service difficulty reports · 4,275

Reports filed under 2421 · AC Generator-Alternator, 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 = '2421'
  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 AALA202607087645Generator · faultedAIRCRAFT WAS NOT GROUNDED: AFTER REACHING CRUISE ELEC A/C BUS R1 EICAS APPEARED WITH PROMPTED MANY OTHER FAILURES ASSOCIATED WITH POWER LOSS. FLIGHT RETURNED TO LAX FOR MAINTENANCE. EMERGENCY WAS DECLARED AND AIRCRAFT WAS OVERWEIGHT FOR LANDING. MAINTENANCE REJul 7, 2026 · N839AA · Boeing 7879SDR DALA2026070603928Idg · leakingDIVERTED TO RDU DUE TO LEFT ENGINE GENERATOR FAIL AND SUBSEQUENT APU AUTO SHUTDOWN. FOUND LT IDG OIL COOLER LINE LEAKING. REPLACED LINE AND LT IDG. LEAK AND OPS CHECK GOOD. NO FAULTS ON APU AND OPS CHECK GOOD. (7985735) AIRCRAFT WAS GROUNDEDJul 4, 2026 · N870DN · Boeing 737932ERSDR ABXA20260629290Gcu · defectiveON TAXI OUT, R GEN OFF EICAS MESSAGE APPEARED WITHIN 1-2 SECONDS OF TAKEOFF POWER APPLICATION. A/C ABORTED TAKE OFF (ATO) AND RETURNED TO GATE (BTB). MTX GROUNDED A/C AND TROUBLESHOT. REMOVED AND REPLACED R/H GCU IAW AMM 24-22-02. OPS CHECK GOOD. PERFORMED IDLJun 29, 2026 · N493MM · Boeing 767300SDR I5PA2026062488801Generator · faultedAPU GEN INOPERATIVE. R & R APU GENERATOR IAW AMM, OPS CHECKED NORMAL.Jun 24, 2026 · N888LT · Boeing 757230SDR ABXA20260624280Generator · faultedPRIOR TO DEPARTURE, APU WAS DEFERRED. DURING CRUISE, R GEN OFF EICAS & L/R UTILITY EICAS MESSAGE APPEARED. RT GEN OFF DISPLAYED THEN RESET, DISPLAYED A SECOND TIME. REQUIRED LANDING AT NEAREST SUITABLE AIRPORT PER QRH. CREW DECLARED AN EMERGENCY AND AIR DIVERJun 24, 2026 · N493MM · Boeing 767300SDR I5PA2026062275705Gcu · inoperativeRIGHT BUSS TIE LIGHT ILLUMINATED. R & R RT GCU IAW AMM OPS CHECK NORMAL.Jun 22, 2026 · N757QM · Boeing 75729JSDR I5PA2026062275704Idg · inoperativeRIGHT ENG IDG INOPERATIVE. (DEFERRED PER MEL 24-00-01). R & R RT ENG IDG IAW AMM, OPS CHKD NORMAL.Jun 22, 2026 · N757QM · Boeing 75729JSDR CALA2026062217259Idg · faultedELEC IDG 1 OIL LO PR -AIR RETURN TO IAD PER FLIGHT CREW. VARGAS TOMC CREW PERFORMED ELEC IDG 1 DISCONNECTED, UNCOMFORTABLE CONTINUING TO RDU. VARGAS TOMC LOCKED FOR POSITIVE FIX IMAGES ADDED OF POST FLIGHT REPORT, AND POPPED #1 ENG IDG DPI. UNLOCKED LOG. REF LJun 19, 2026 · N817UA · Airbus A319131SDR N6WA2026062209Idg · warning messageABORTED TAKEOFF AFTER IDG 1 CAUTION MESSAGE RECIEVED. AS PER TELECON WITH MXC, DEFERRED IDG 1 CAUTION MESSAGE ON OCN 70101614 PER MEL 24-11-01A CATEGORY AJun 17, 2026 · N556GJ · Cndair CL6002C11SDR 2026FA0000520Alternator · seizedFLIGHT CREW REPORTED ALTERNATOR 2 FAILURE FOLLOWED BY STRONG BURNING SMELL IN CABIN. ALTERNATE AIRPORT WAS USED WITH AN EMERGENCY LANDING DECLARED. THE ROOT CAUSE OF THE PROBLEM WAS INTERNAL FAILURE OF ALTERNATOR 2 BEARING CAUSING COMPLETE SEIZURE OF ROTATIOJun 15, 2026 · N908WM · Cirrus SR20SDR DALA2026061603616Idg · malfunctionedSHIP 9505-ATO- RIGHT GENERATOR OFF MESSAGE AT THROTTLE UP. REPLACED THE RIGHT IDG. ALL RTS NORMAL. (LP 8906976 - AIRCRAFT WAS GROUNDED)Jun 15, 2026 · N945AT · Boeing 717200SDR AALA202606169021Oil System · overservicedAIRCRAFT GROUNDED. AN EMERGENCY WAS DECLARED & ACFT DIVERTED TO ATL DUE TO FLT CREW REPORTING THAT AT CRUISE, NR 1 IDG ABOUT 30 DEGREES HOTTER THAN NR 2 IDG. TEMP CONTINUED TO CLIMB. AT ABOUT 125 C, STARTED TO GET FUMES IN FLT DECK, ACFT LANDED SAFELY AT ATJun 15, 2026 · N655AW · Airbus A320232SDR I5PA2026061375703Gcu · inoperativeRIGHT BUSS TIE TRIPS WHEN POWER TRANSFERED. R & R RT GCU IAW AMM, OPS CHECKED NORMAL.Jun 13, 2026 · N757QM · Boeing 75729JSDR VNAA2026061218801Gcu · faultedAAN AC ESS BUS FAIL, WILL NOT TRANSFER / REMOVED AND REPLACED GCU 1 IAW AMM 24€“11€“07€“000/400€“801. OPS CHECK GOOD. PERFORMED SUCCESSFUL OPS CHECK OF ESS BUS TRANSFER SYSTEM IAW AMM 24€“51€“00€“710€“803.Jun 9, 2026 · N602NN · Cndair CL6002D24SDR YENA2026060800463Tru · failedFLT # 1926, LGW-BOS. (ETOPS) "TRU1 FAULT ON ECAM; R+R TRU 1 IAW AM 24-32-51. OPS CHECK GOOD NO DEFECTS NOTED AT THIS TIME."Jun 7, 2026 · N2165J · Airbus A321271NXSDR ANCF20260605012Idg · overheatedELEC IDG  1 OIL  OVERHEAT DURING FLIGHT / IN ACCORDANCE WITH AMM TASK 24-21-51-000-040/400-040 IDG 4000XU ON ENG 1 WAS REPLACED, AS PER TSM 24-00-00-810-816-A; OIL SERVICE WA ACCOMPLISHED REF AMM 12-13-24-612-041 PENDING TEST / IN ACCORDANCE WITH AMM 24-21--0Jun 5, 2026 · N230AC · Airbus A320214SDR 2026FA0000477Generator · failedIN V1 IF PRESENT LOSS OF ALL GENERATOR WAS PERFORMED EMERGENCY CHECK LIST WITH UNSATISFACTORY STATE. COME BACK AIRPORT OF BOGOTÁ. ACCOMPLISHED CHECKOUT ANALYSIS OF ELECTRICAL GENERATOR SYSTEM IAW 727 AMM 24-20-00 / 101-113. FOREIGN REGISTRATION: HK-5216Jun 5, 2026 · Boeing 727227SDR SWAA2026060107546Gcu · faultedDURING DESCENT AUTOPILOT DISCONNECTED NR 2 SOURCE OFF LIGHT ILLUMINATED FOLLOWED QRH DEFAULT DESCRIPTION. R & R APU GCU IAW AMM 24-21-81. OPS CHECKED GOODMay 28, 2026 · N8518R · Boeing 7378H4SDR DALA2026053103304Idg · faultedON APPRAOCH IDG 1 REACHED 147 AND WAS FLASHING GREEN. TEMPERATURE COOLED BACK DOWN GRADUALLY AND WAS BACK TO NORMAL TEMP AFTER LANDING. T/S PER TSM 24-20. FOUND IDG 1 OVER SERVICED, PROPERLY SERVICED IDG 1 IAW A319 AMM 12-13 RAN ENGINE & PERFORMED OP CK, FOUNMay 28, 2026 · N354NB · Airbus A319114SDR 2026FA0000433Alternator · inoperativeTHE PILOT REPORTED THE LH ALTERNATOR FAILURE LIGHT ILLUMINATED IN FLIGHT, WITH THE LH ALTERNATOR INDICATING NO ELECTRICAL OUTPUT. THE ALTERNATOR WAS INSTALLED ON 05/20/2025 AT AN AIRFRAME TOTAL TIME OF 4939.8 HOURS AND WAS REMOVED AS INOPERATIVE ON 05/14/2026.May 27, 2026 · N506DR · Cessna 310RSDR DALA2026060103328Generator · arcedAFTER MCD WAS CLOSED FOR DEPARTURE STRONG PERVASIVE SMELL FILLED COCKPIT AND CABIN DIDNT DISSAPATE UNTIL MCD WAS OPENED BACK UP 5-10 MIN LATER. R&R APU STARTER GENERATOR IAW B737 AMM 49-41-21. OPS AND LEAK CHECK GOOD. ACCOMPLISHED ODER REPAIR CONFORMATION PER May 26, 2026 · N934DZ · Boeing 7379GPERSDR YENA2026052600488Idg · warning messageFLT 523, JFK-LAX. (ETOPS) PER CREW: CLASS 2 AC GEN MAINTENANCE STATUS MESSAGE PRESENT. R & R INTAGRATED BRING GENERATOR (IDG) IAW AMM 24-21-51-400-803-A. OPS CHECKED OKAY. MX-4 UPDATED. PLACARD REMOVED.May 26, 2026 · N2193J · Airbus A321271NXSDR I5PA2026052588802Actuator · faultyAPU FAULT, IGV FLAGGED DURING APU BITE TEST. R & R IGV ACT PER AMM.May 25, 2026 · N888LT · Boeing 757230SDR CALA2026052216483Idg · faultedRIGHT SIDE ELECTICAL DRIVE FAILED WHILE IN CRUISE AT FL350 #2 ENGINE IDG DISCONNECTED IF FLT. PERFORMED BITE TEST ON #2 GCU, FOUND IDG FAULT. R&R OF E2 IDG AND E2 GCU. REMOVED AND REPLACED GCU FOR E2. PER TOM C REQUEST. REF AMM 24-21-81. OPS CHECK NO DEFECTS May 21, 2026 · N31412 · Boeing 737924SDR YENA2026052100477Generator · false indicationFLT # 7, JFK-LHR. (ETOPS) AC GEN CLASS II MESSAGE ( CLASS II MAINTENANCE MESSAGE SDISPLAYED ON ECAM STATUS PAGE OF ECAM SYSTEM DISPLAY FAULT(S) INDICATED BY GPCU OR AC GEN); MONITORING OF AC GEN CLASS II MSG. ACCOMPLISHED. NO MSG IN VIEW. ITEM CLEARED PER AMMMay 20, 2026 · N4022J · Airbus A321271NXSDR YENA2026052100473Generator · failedFLT 2895, BOS-PUJ. EXTREME STRONG DIRTY SOCK SMELL AFTER LANDING WITH APU ON. DID NOT DISSAPATE WHILE AT GATE. ( APU SYSTEM ); REMOVED & REPLACED APU GENERATOR PER AMM 24-23-51 OPS CHK GOOD NO ODOR NOTED, MDDR CLEARED, MX-4 UPDATED . PLACARD REMOVED.May 19, 2026 · N958JB · Airbus A321231SDR ABXA20260517208Generator · disengagedRIGHT GEN OFF MESSAGE ON TAKEOFF ROLL. ABORTED TAKEOFF BELOW 80KTS.TURNED OFF ONTO TAXI WAY CREW DEFERRED RH GEN. FOR DEPARUTRE ,PER MEL 24-00-0-1.AND A/C TOOK OFF.May 17, 2026 · N1709A · Boeing 767375SDR ASAA2026051666171Gcu · faultedGEN CONTROL UNIT A/C LEFT IN E+E BAY HAS BTB FAULT LIGHT ILLUMINATED. GROUNDED - YES. RESET GCU REF AMM 24-21-81-400-801 NO FAULTS NOTED.May 16, 2026 · N506AS · Boeing 737890SDR ABXA20260516211Generator · inoperativeON T/O, RT GEN OFF ON THRUST ADVANCE. CREW DEFERRED IAW 24-00-1-1 AND PERFORMED AN ABORTED TAKE OFF (ATO). MTC DEFERRED PER MEL 24-00-1-1 MX PROCEDURES C/W PLACARD INSTALLED. A/C DOWNGRADED TO ETOPS 120. ACFT RETURNED TO SERVICE.May 16, 2026 · N1361A · Boeing 76731BSDR ABXA20260514200Generator · faultedDURING TAXI, APU RANDOMLY DROPS OUT ON PUSHBACK (2 TIMES). CREW RETURNED TO GATE (BTB). MTC DEFERRED APU GENERATOR IAW ABX MEL 24-00-2A NO DEACTIVATION REQUIRED PLACARD INSTALLED AC REMAINS NO ETOPS. A/C RETURNED TO SERVICE.May 14, 2026 · N363CM · Boeing 767338SDR ABXA20260505187Generator · faultedAPU GEN DROPPED OFF LINE. A/C RETURNED TO BLOCKS (BTB). MAINTENANCE PLACED APU GEN ON DI IAW MEL 24-00-2A, AC RELEASED NO ETOPS. MBCB 05/15/26. A/C RETURNED TO SERVICE.May 5, 2026 · N363CM · Boeing 767338SDR ABXA20260505186Generator · faultedAPU GEN FIELD LIGHT CAME ON DURING PUSH BACK A/C RETURNED TO GATE AND MTX GROUNDED A/C. MTX RESET GEN FIELD SWITCH ON P61. PANEL ,CYCLED APU POWER AND OPS CHECKED PER AMM 24-21-00.A/C POWER NORMAL A/C REMAINS ETOPS 180 AND RETURNED TO SERVICE.May 5, 2026 · N363CM · Boeing 767338SDR QXEA2026050600101Idg · malfunctionedFLIGHT 2351. "IDG 1 OFF BUS" EICAS MESSAGE IN FLIGHT. RAN CHECKLIST AND TURNED IDG OFF. DIVERTED AND ACCOMPLISHED UNEVENTFUL LANDING. REMOVED FROM SERVICE. INTERROGATED CMC, FOUND FAULT CODE 24210002GU1. PERFORMED FIM 24-21-00-810-803-A AND REPLACED GCU1 IAW May 3, 2026 · N644QX · Emb ERJ170200LRSDR DALA2026050402791Generator · faultedDIV - TO RDU DUE TO ELEC GEN 1 FAULT WITH APU ON MEL. REPLACED #1 IDG. (LP 8699274 - AIRCRAFT WAS GROUNDED)May 2, 2026 · N393DN · Airbus A321211SDR QR9R2026042900001Sensor · fluctuatesGENERATOR SPLIT 20 AMPS PRIOR TO TAKEOFF. A TEST PILOT EVAL REVEALED CURRENT SENSOR FAILED OPERATIONAL CHECKS. REMOVED AND REPLACED NR 2 CURRENT SENSOR IAW AMM 24-30-00, 4-6; MOC SUCCESSFULLY COMPLETED.Apr 29, 2026 · Bolkms BK117C2SDR ABXA20260427177Generator · malfunctionedAFTER TAKEOFF, APU GEN OFF LIGHT AND EICAS MESSAGE. ATTEMPTED 1 RESET PER QRH. NO RESET. AIR TURN BACK COMPLETED.DUE TO DEFERRAL OF LH IDG . MTC REMOVED AND REPLACED APU GENERATOR IAW B767 AMM 24-21-01 OPS TEST GOOD. A/C REMAINS ETOPS 180. A/C RETURNED TO SERVApr 27, 2026 · N363CM · Boeing 767338SDR CALA2026041515384Idg · inoperativeENG 1 SOURCE OFF LIGHT ILLUMINATED ENG 1 IDG FAULT LIGHT ON GENERATOR CONTROL UNIT. REPLACED ENG 1 IDG REF AMM 24-11-11. OPS CHECK, LOAD TEST, LEAK TEST AND DISCONNECT TEST SUCCESSFUL REF AMM 24-11-00. ACCOMPLISHED ALL REQUIRED IDT INSPECTION FOR E-1 IDG REMApr 14, 2026 · N77530 · Boeing 737824SDR A6WA202604138884Idg · faultedON TAKEOFF ROLL RECEIVED NR 2 IDG CAUTION FOLLOWED BY GEN 2 OFF ABORTED TAKEOFF PRIOR TO 80KTS. C/W CM ACTION PLACARDED AND PLACED ON MEL. AIRCRAFT REMOVED FROM SERVICE. PLACED IDG NR 2 ON MEL, NO HOT BRAKES WERE NOTED DURING CALL. REF W/O 347513 FOR R&R Apr 13, 2026 · N442AW · Cndair CL6002B19SDR YENA2026041300391Idg · failedFLT# 123, JFK-LAX. (ETOPS) AC GEN MAINTENANCE MSG AT GATE PRIOR TO ENGINE START. REMOVED AND REPLACED ENG # 2 IDG IAW AMM 24-21-51. OPS CHK NORMAL. NO LEAKS NOTED. NO DEFECTS NOTED AT THIS TIME.Apr 10, 2026 · N4022J · Airbus A321271NXSDR YENA2026040600380Idg · failedFLT 2824, LAX-LAX, DURRING TAKE OFF ROLL BELLOW 80 KTS GEN 1 FAULT MASTER CAUTION GEN 1 FAULT ECAM RAN PER SOP TAXI TO GATE MAX BRAKE TEMP 320 THUMP BRAKE CHATTER DURRING REJECTED TAKE OFF. ( ENGINE DRIVEN GENERATOR CHANNEL (IDG, GCU, LINE CONTACTOR) IDG 1 ORApr 7, 2026 · N987JT · Airbus A321231SDR CALA2026040715152Gcu · faultedRIGHT GEN CONT OFF LIGHT ILUMINATED. RESET, LIGHT EXTINGUISHED SOON AFTER RH BUS TIE ANUNCIATOR LIGHT CAME ON. CREW DID NOT ATTEMPT RESETOF RH BUS TIE.SDR DUE TO DECLARED IN-FLIGHT EMERGENCY CREW PHOTOS PART 1 BPCU BITE SHOWS : RIGHT GCU MONITOR "NO R GCU DATAApr 5, 2026 · N76054 · Boeing 767424ERSDR YENA2026040300368Warning Message · illuminatedFLT 31 AMS-BOS (ETOPS). MAINTENANCE AC GEN MESSAGE ON STS PAGE ( CLASS II MX MSG - GPCU OR AC GEN ). OPENApr 1, 2026 · N4022J · Airbus A321271NXSDR YENA2026040100366Idg · failedFLT 31 BOS-AMS (ETOPS). MAINTENANCE AC GEN MESSAGE ON STS PAGE ( CLASS II MX MSG - GPCU OR AC GEN ). ACCOMPLISHED SUCCESSSFUL OPS CHECK AND GROUND VERIFICATION OF # 2 IDG PER AMM SUBTASK 24-21-51-720-064-A AND 24-21-51-720-065A OPS NORMAL NO LEAKS NOTED.Apr 1, 2026 · N4022J · Airbus A321271NXSDR ABXA20260331141Gcu · defectiveL AC BUS OFF AT TOP OF CLIMB OUT FROM CVG BOUND FOR MHT. CREW RAN THROUGH THE QRH AND RESET EVERYTHNING. THEY DECLARED AN EMERGENCY (EDC) AND RETURNED TO CVG WITHOUT INCIDENT. (ATB). MAINTENANCE REMOVED AND REPLACED GCU IAW AMM 24-22-02. OPS CHECK GOOD AC Mar 31, 2026 · N1321A · Boeing 767306SDR DALA2026032301930Generator · faultedDUE TO LOSS OF BOTH ENGINE GENERATORS (ELEC GEN 1 FAULT AND ELEC GEN 2 FAULT ECAM WARNINGS), RAT DEPLOYED, AND APU GENERATOR RUNNING, #2 GENERATOR RECOVERED. CORRECTIVE ACTION: FOUND IDG #1 OVERSERVICED IN THE RED BAND. MAINTENANCE STILL IN PROGRESS. (LP: 8427Mar 22, 2026 · N334NB · Airbus A319114SDR CALA2026040615066Seal · leakingPLACED NR 2 ENGINE ON DIP FOR HOC. CAPPED THE EDP, MFP, BUG, IDG & HMU DRAIN LINES AND DIP FOR 25 CYCLES PER AMM 71-71-00-700-801-H01. ENG 2 DUE TO HIGH OIL CONSUMPTION CAPPED THE EDP, MFP, BUG, IDG & HMU DRAIN LINES IAW AMM 71-71-00-700-801-H01 C/W REPAIR Mar 21, 2026 · N2846U · Boeing 777300ERSDR DALA2026031701820Pcdu · faultedABORTED TAKEOFF DUE TO A RIGHT GENERATOR OFF MESSAGE. MAINTENANCE REPLACED THE RIGHT PCDU AND RIGHT GENERATOR RELAY. ALL ENGINE RUNS AND RETURN TO SERVICE TESTS PASSED.Mar 13, 2026 · N948AT · Boeing 717200SDR QR9R2026031100002Sensor · fluctuatesGEN AMP SPLIT DURING RUN-UP GREATER THAN 10 AMPS. WHEN A/C WAS AT FLY, #1 SHOWED 40 AMPS AND #2 WAS 5 AMPS. REMOVED AND REPLACED CURRENT SENSOR IAW AMM 24-30-00, 4-6. MOC SUCCESSFULLY COMPLETED.Mar 11, 2026 · Bolkms BK117C2SDR AALA202606034430Idg · failedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO BWI DUE TO THE FLIGHT CREW REPORTING DURING CLIMB THE #1 AND #2 GENERATORS FAILED AT FL 230. THE RAT DEPLOYED AND THE FLIGHT CREW WAS ABLE TO RESTORE #1 GENERATOR. THE AIRCRAFT LANDEMar 5, 2026 · N556UW · Airbus A321231SDR AALA202603064430Generator · failedAIRCRAFT WAS GROUNDED: AN EMERGENCY DECLARED AND DIVERTED TO BWI DUE TO THE FLT CREW REPORTING DURING CLIMB THE NR 1 & 2 GENERATORS FAILED AT FL 230. RAT DEPLOYED & FLT CREW WAS ABLE TO RESTORE NR 1 GEN. ACFT LANDED SAFELY AT BWI & TAXIED TO THE GATE UNDER IMar 5, 2026 · N556UW · Airbus A321231
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