JASC 2421
Service difficulty reports · 4,277
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.
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
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 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 LANDESDR 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 ISDR QR9R2026030300001Sensor · fluctuatesIN FLIGHT, GENERATOR AMP NR 1 AT 30-35 %, GEN AMP NR 2 FLUCTUATES 10-25 %. REMOVED AND REPLACED NR 2 CURRENT SENSOR IAW AMM 24-30-00, 4-6.SDR CALA2026030314263Gcu · faultedAFTER ENGINE START THE L GEN EICAS ILLUMINATED RAN CHECKLIST AND RESET L GEN SUCESSFULLY REMOVED AND REPLACED BOTH L GCU & BPCU REF AMM 24-22-02 & FIM 24-20-04. NO FAULTS FOUND AND OPS CHECK GOOD AFTER ENGINE RUN.SDR K11A2026030200371Generator · faultedNR 2 GENERATOR FAILED AFTER TAKEOFF AT AROUND 6000 FEET. GEN BUS OFF LIGHT ILLUMINATED, PERFORMED GEN BUS OFF LIGHT QRH. AFTER GENERATOR WAS RE ENGAGED GEN BUS OFF LIGHT ILLUMINATED AGAIN, FREQUENCY WAS ZERO VOLTS WERE NORMAL. TRANSFERRED TO DMI # 33700047 CASDR SWAA2026030375539Idg · failedNUMBER 2 GENERATOR DROPPED OFF-LINE WITH ASSOCIATED DRIVE LIGHT. ACFT OK TO CONTINUE IAW MEL 24-1-02. VERIFIED NR 2 ENG IDG OIL FULL, NO LEAKS NOTED, & APU OIL LEVEL FULL. NR 2 ENG DRIVE LIGHTS & GEN NR 2 BUSS OFF LIGHTS REMOVED. R & R THE NR 2 IDG IAW 2SDR DALA2026022501330Idg · faultyDIVERTED INTO MAO DUE TO NR 1 ENG IDG FAILURE. REPLACED IDG & GCU. OK FOR SERVICE. (8131430)SDR 2026FA0000165Alternator · failedPILOT HAD AN ALTERNATOR FAILURE IN CRUISE.SDR CALA2026021813870Idg · faultedRIGHT GENERATOR DRIVE DISC CAUTION LIGHT. PERFORMED QRH, CREW ASSISTED TO PERFORM IDLE ENGINE RUN TO CONFIRM RT IDG DISCONNECTED. APPROVED MEL, RT ENG GEN DISCONNECTED AND SWITCHED OFF, DEFERRED IAW MEL 2400F. THERE IS HISTORH REF LP-7704551. R & R GCU ANSDR HNAA2026021600121Contactor · arcedAPU GEN OVERLOAD FOLLOWED BY APU GEN FAIL FOLLOWED WITH APU SHUTDOWN WITH BURNING SMELL IN FLIGHT DECK WITH SMOKE FROM APU EXHAUST MEL 14FEB26 13:49 CLT C04522 49-1 APU AUXILIARY POWER UNIT DFRL 15FEB26 06:26 ALB SEE HA 300 SEQ 7 OF ALB RON PACKAGSDR AALA202602186906Idg · faultyAIRCRAFT WAS GROUNDED: DURING TAXI TURNING TO THE RIGHT, #1 ENGINE RUNNING, APU OFF, #2 ENGINE OFF, HAD A COMPLETE LOSS OF ELECTRICAL AND HYDRAULIC POWER. THE AIRCRAFT LOST NOSE WHEEL STEERING AND HAD MINIMAL BRAKING ABILITY. NO ECAM AVAILABLE DUE TO TOTAL LOSSDR MTNA2026021600001Alternator · inoperativeALTERNATOR FAILURE AFTER START. STANDBY POWER ON CONTINUOUSLY. REMOVED AND REPLACED ATANDBY ALTERNATOR AND BELT.SDR AALA202602183619Gcu · faultedAIRCRAFT WAS GROUNDED: LOST BOTH GENERATORS SIMULTANEOUSLY AT FL270. ABLE TO RESTORE BOTH VIA CHECKLIST. RAT DEPLOYED. DECESION MADE TO DIVERT TO CLT. EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED # 1GCU (AALA202602131987) AND #SDR AALA202602180630Idg · faultyAIRCRAFT WAS GROUNDED: LOST BOTH GENERATORS SIMULTANEOUSLY AT FL270. ABLE TO RESTORE BOTH VIA CHECKLIST. RAT DEPLOYED. DECESION MADE TO DIVERT TO CLT. EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED # 1GCU (AALA202602131987) AND #2 SDR AALA202602186690Idg · failedAIRCRAFT WAS GROUNDED: LOST BOTH GENERATORS SIMULTANEOUSLY AT FL270. ABLE TO RESTORE BOTH VIA CHECKLIST. RAT DEPLOYED. DECESION MADE TO DIVERT TO CLT. EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT MAINTENANCE REPLACED # 1GCU (AALA202602131987) AND #2 GSDR AALA202602181987Gcu · faultyAIRCRAFT WAS GROUNDED: LOST BOTH GENERATORS SIMULTANEOUSLY AT FL270. ABLE TO RESTORE BOTH VIA CHECKLIST. RAT DEPLOYED. DECESION MADE TO DIVERT TO CLT. EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED # 1GCU (AALA202602131987) AND #2SDR AALA202602131987Generator · failedAIRCRAFT WAS GROUNDED: LOST BOTH GENERATORS SIMULTANEOUSLY AT FL270. ABLE TO RESTORE BOTH VIA CHECKLIST. RAT DEPLOYED. DIVERTED TO CLT. EMERGENCY DECLARED AIRCRAFT LANDED WITHOUT INCIDENT. (OPEN)SDR AALA202606103242Generator · odorAIRCRAFT WAS GROUNDED: STRONG ODOR IN AIRCRAFT AFTER TAKEOFF ALL THE WAY TO CRUISE. DECESION MADE TO RETURN TO JFK. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED REPLACED THE APU GEN PER AMM 24-23-51.SDR AALA202602113242Generator · odorAIRCRAFT WAS GROUNDED: STRONG ODOR IN AIRCRAFT AFTER TAKEOFF ALL THE WAY TO CRUISE. DECESION MADE TO RETURN TO JFK. AIRCRAFT LANDED WITHOUT INCIDENT.SDR GTIA2026020939275Generator · multiple failAIRCRAFT LOST GENERATOR 1 AT 36,000 FT, AC BUSS 1 INOPERATIVE, DC BUSS 1 INOPERATIVE, MULTIPLE FAILURES.SDR CALA2026020413545Idg · faultedAFTER TAKEOFF LOST L GEN. CREW FOLLOWED FM AND DISCONNECTED IDG .BPCU READ OUT DISPLAYED L IDG HIGH DELTA TEMP. NR 1 ENG C DUCTS OPENED TO INSPECT IDG FOUND NO LEAKS OR EXTERNAL DEFECTS, FOUND DURING IDG SERVICING 1,5 QT OF OIL ON OVERFLOW CAME OUT. NO OTHER SDR YENA2026020200109Seal · leakingFLT 1621, LHR-BOS (ETOPS), NR 1 ENGINE IDG REQS REPLACEMENT DUE TO LEAK AROUND DRIVE SHAFT SEAL. R & R THE NR 1 IDG IAW AMM 24-21-51 REF L/P 4637336 ITEM 1 FOR OPS / LEAKS CHK. PERFORMED ENG NR 1 IDG OPS AND LEAK CHK PER AMM 24-21-51. OPS AND LEAK CHK GOODSDR CALA2026020213494Idg · faultedLEFT GEN DRIVE EICAS CAME BACK ON & STAYED ON, LT GEN DRIVE DISCONNECT PUSHED IAW QRH FOR MAINTENANCE ACTION. REMOVED NR 1 ENG IDG IAW AMM 24-11-01. ACP IDT INSPECTION OF FEEDER CABLES INSTALLATION, IAW GMM 09-10-05. UNIONS FROM OLD IDG NEED TO BE TRANSFERRSDR CALA2026012613237Idg · inoperativeLEFT GEN DRIVE LIGHT NOT ILLUMINATED. LT ENGINE GENERATOR DRIVE LIGHT INOPERATIVE. EICAS VERIFIED TO OPERATE NORMALLY PLACED ABOVE ITEM ON DEFERRAL PER MEL 2411G INOP, COMPLIED WITH DDP. DM IAW WDM 24-11-11. RELAY (K1033),PANEL (M10063) & GCU (M146). R & R SDR CALA2026012013109Idg · faultedLEFT DRIVE LIGHT ON AT CRUISE, DRIVE MAS DISCONNECTED WITH CHECKLIST, REMOVED AND REPLACED IDG ON ENG NR 1 IAW AMM 24-11-01-424-002.SDR YENA2026010900022Idg · failedFLT# 1134 SJU-SJU. " ENG NR 2 IDG OVERTEMP. IN CLIMB OUT. FOLLOWED ECAM AND DISCONNECTED.; REMOVED AND REPLACED ENG NR 2 IDG PER A.M.M. 24-21-00. NO FAULTS NOTED. A/C OK TO CONT. SVC."SDR DXTA2026010906459Generator · faultyWSHLD HEAT INOP R AMBER CAS MESSAGE POSTED DURING CLIMB OUT. RAN QRH. REPLACED AC GENERATOR SEALS IAW PW306D MM 72-60-01 REMOVED DEFECTIVE AC GEN AND INSTALLED OVERHAULED AC GENERATOR IAW CE680A MM 24-20-05 POST-MAINTENANCE CHECKS AND WINDSHIELD FUNCTIONAL CSDR CALA2026010212586Seal · leakingNUMBER 1 ENG OIL QTY SLOWLY REDUCED TO 0 OVR 90 MINS ALL OTHER ENG IND. NORM AT THIS TIME. CAPT REPORTED THE OIL PRESSURE WAS 92 PSI UPON ENG SHUTDOWN AFTER LANDING CREW REPORTED ENG NR 1 OIL PRESSURE DROPPED DOWN TO 90 PSI. ACP'D ENG NR 1 INSPECT FOUND OIL COSDR U2RA2025122900027Generator · failedAPU GENERATOR #2 HAS SPARKS COMING OUT OF CASE - APU AFTER FIRE INSPECTION IN ACCORDANCE WITH AIRCRAFT MAINTENANCE MANUAL 49-11-00. APU COOLING AIR INTAKE DAMAGED. APU DEFERRED PER MINIMUM EQUIPMENT LIST AND GENERATOR WILL BE REPLACED AT A LATER DATE.SDR ASMF202601060355Generator · warning lightELECTRIC GENERATION SYS L2, DIVERTED TO HND. ITEM DEFERRED BY MEL 24-22-01-03B CAT A, VFSG L2 WAS REPLACED IAW AMM DMC-B787-A-24-21-09-008-520ASDR FDEA202512132249Idg · failedON TAXI IN WE GOT A LEFT GENERATOR OFF LIGHT AND L GEN EICAS MESSAGE. PERFORMED BITE CHECK ON BPCU WITH FAULTS- DP TRIP- MAIN BUS/OVERLAP ZONE AND DP TRIP- GEN/FDR & SERVICED LEFT IDG. RAN LEFT ENGINE (#500559) AND GEN LIGHT OFF CAME RIGHT AWAY. INSPSDR U2RA2025122900026Generator · failedDURING CREW PREFLIGHT CHECKS (AIRCRAFT DOORS OPEN), APU FIRE AND APU AUTOSHUTDOWN DISPLAYED. - FOUND #1 APU GENERATOR MECHANICAL FAILURE CAUSING FIRE IN APU COMPARTMENT. FIRE CONTAINED TO APU COMPARTMENT AND WAS EXTINGUISHED BY CREW PERFORMING APU FIRE EXTINGSDR ABXA20251210327Generator · faultedDURING TAXI AND UPON NR 2 ENGINE START, RT GENERATOR CONT INDICATED OFF, RT AC BUSS INDICATED NO POWER, RT BUSS TIE INDICATED OFF AND FMC AND LOWER EICAS WENT DEAD. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE TESTED RT IDG IAW FIM 24-20-43 A1. OPS CHECKEDSDR AALA202512110683Idg · inoperativeAIRCRAFT WAS GROUNDED: LOST GEN 2 INFLIGHT. RESET UNSUCCESSFUL. DECESION MADE TO RETURN TO DFW, EMERGENCY DECLARED. AIRCRAFT LANDED OVERWEIGHT WITHOUT INCIDENT. MAINTENANCE REPLACED #2 ENG IDG PER W/C 26L40024001.SDR SWIA2025120400003Idg · faultedDURING THE APPROACH WE GOT THE RECEIVED SLATS/FLAPS DISAGREEMENT CAUTION MESSAGE FOLLOWED BY THE IDG 2 OFF BUS MESSAGE. AFTER ACCOMPLISHING THE DISCONTINUE PROCEDURE WE DID THE IDG 2 OFF BUS QRH. AND IT CLEARED ALL THE MESSAGES. DETERMINED IDG2/GCU2 (FREQ MODSDR CALA2025120211691Idg · faultedELEC GEN OFF RT EICAS ADVISORY RT GENERATOR CONTROL BREAKER (GCB) OPEN OR GENERATOR CONTROL SWITCH OFF, & ENG NOT SHUTDOWN. RT GCU REPLACED ON 11/26 & RT IDG REPLACED ON 11/27 IAW PILOTS ENG 2 IDG TRIPPED AT GATE IN IAD. RESET IAW MANUAL & CONTINUED UNTIL RTSDR YENA2025112801128Idg · failedFLT 133, BOS-SFO. (ETOPS), ELEC GEN1 FAULT ILLUMINATED IN FLIGHT RESETS WERE NOT SUCCESSFUL ( ENGINE DRIVEN GENERATOR CHANNEL (IDG, GCU, LINE CONTACTOR) IDG NOT DISCONNECTED ); PERFORMED OPS CHECK OF ENG 1 IDG IAW AMM 24-21-51. OPS CHECK GOOD , MDDR CLEARED, SDR FDEA202511272214Idg · failedR GEN DRIVE EICAS IN-FLIGHT. ACCOMPANIED BY ILLUMINATED R GEN DRIVE SWITCH LIGHT. COMPLIED WITH QRH. EMERGENCY DECLARED. PERFORMED RT ENG RUN TEST BER AMM 71-00-00-5-3, FOUND RT GEN CONT OFF LIGHT ON. BITE OF BPCU FOUND FAULT RT ENG GEN MPU/WIRING. WIRSDR AALA202512017733Generator · failedAIRCRAFT WAS GROUNDED: AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: RIGHT GENERATOR FAILURE FOLLOWED BY EXCESSIVE RIGHT ENGINE VIBRATION. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT BZE. FOUND EXCESSIVE ENGINE DAMAGE DUE TO BLADE PLATFORM LIBERATION.SDR AALA202512025106Idg · failedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: AT FL350 IN CRUISE LEFT TRANSFER BUS OFF AND SOURCE OFF LIGHT SIMULTANEOUSLY ILLUMINATED. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT PHX. REMOVE AND REPLACED NUMBER 1 (IDG)-INTEGRATED DRIVE GENERATOR. PESDR CALA2025111711255Gcu · faultedGENERATOR SOURCE OFF LIGHT, LIGHT COMES ON BUT NO FAULT LIGHT ON GCU ON GEN 2, SOURCE OFF LIGHT. WHILE TESTING AC SYSTEM, GEN & APU MODULE GEN 2 SOURCE OFF LIGHT CAME ON. GEN 1 WAS ON LINE, RESET GEN 2 & SOURCE OFF LIGHT WENT OUT. GCU 2 NOW HAS AN IDG FAULSDR YENA2025111001097Gcu · faultedFLT 1591, JFK-LIR. (ETOPS) CLASS II MAINTENANCE AC GEN ( CLASS II MX MSG - GPCU OR AC GEN ); REMOVED AND REPLACED NR 2 GCU IAW AMM 24-22-34. OPS CHK GOOD NO FAULT MSG PRESENT AT THIS TIME MX-4 UPDATED PLAC REMOVED.SDR DALA2025110608090Idg · inoperativeON TAXI IN UPON SHUTDOWN OF ENG NR 2 ENTIRE JET WENT BLACK, GEN 1 DID NOT PICK UP THE LOAD VIA BUS TRANSFER. SWITCH IS IN AUTO POSITION. R/R NBR 1 IDG PER AMM 2411. OPS CKS GOOD.SDR YENA2025103001074Warning Message · illuminatedFLT#111, JFK-LAS. (ETOPS) "CLASS 2 AC GEN FAULT ( CLASS II MX MSG - GPCU OR AC GEN )" (SUPPLEMENTAL INFORMATION TO FOLLOW)SDR HALA20251028331Generator · faultedETOPS - APU GENERATOR FAULTING. REMOVED AND REPLACED GAPCU OPS CHECK PENDING AC 024678 IAW 24-41-34/401. FAULT CONTINUED. REPLACED APU GENERATOR PER AMM 24-23-51. OPS CHECK GOOD. A/C OK FOR SVC.SDR DALA2025102207743Idg · inoperativeMISC/DE- DUE TO RIGHT GENERATOR FAILED WITH APU ON MEL. REPLACED RIGHT ENGINE IDG AND RIGHT GCU. APU EGT THERMOCOUPLE REPLACED.SDR QR9R202510170003Sensor · out of limitsGEN AMPS INDICATIONS WERE 25-35 OFF OF EACH OTHER. #1 INDICATED 10-15 AMPS, #2 INDICATED 30-40 AMPS. AFTER AVIONICS CYCLED PITOT HEAT ON AND OFF, THE AMPS BEGAN FLUCTUATING 10-20 AMPS EACH. DURING SHUTDOWN AT IDLE THE AMPS INDICATED ONLY 5 AMPS DIFFERENCE. REMSDR DALA2025101707598Idg · faultedSHIP 9547-MISC/DE- ON DESCENT THE CREW RECEIVED A "RT GEN OFF" MESSAGE WITH THE APU ON MEL. CORRECTIVE ACTION: MAINTENANCE REPLACED THE RIGHT IDG AND PERFORMED ALL RTS TESTS.(7586116)SDR YENA2025101401029Warning Message · false activationFLT#188, LAX-BOS. (ETOPS) AC GEN CLASS II ( CLASS II MX MSG - GPCU OR AC GEN ); FOLLWED TSM 24-22-00-810-832A BITE TESTS PASSED NO ACTIVE MSGS MDDR CLEAR MX-4 UPDATED.SDR WX0A2025101332596Seal · leaking(AIRCRAFT NOT GROUNDED) FA'S REPORT DIRTY SOCK SMELL DURING FINAL APPROACH FWD & AFT. FA'S REPORT EYES BURNING & WATERING AS A REACTION. / PERFORMED TC 21-000-002. FOUND OIL LEAK FROM GENERATOR SEAL PLATE. REMOVED AND REPLACED GENERATOR SEAL PLATE IAW AMM 24-2
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