JASC 8300

Service difficulty reports · 306

Reports filed under 8300 · Accessory Gearboxes, 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 = '8300'
  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 DBCA202608190001Gearbox · contaminatedRT EGINE ROLL BACK ON CLIMB OUT. EMERGENCY DECLARED BY CREW, AIRCRAFT RETURNED TO DEPARTURE AIRPORT (135 MED FLIGHT) PATIENT ALREADY DROPPED OFF, ONLY 2 FLIGHT NURSES AND 2 CREW ON BOARD. ONSITE INVESTIGATION BY HOME BASE MX TEAM FOLLOWING DAY REVEALED EXCESSAug 6, 2026 · N279AH · Pilats PC24SDR DALA2026072304302Alternator · detachedRETURNED TO DTW DUE TO LOSS OF NBR 2 ENGINE OIL QUANTITY AND PRESSURE. CREW SHUT ENGINE DOWN WHEN QUANTITY AND PRESSURE WENT TO ZERO. MTC FOUND ENGINE CONTROL ALTERNATOR DETACHED FROM AGB MOUNTING PAD. MAINTENANCE IN PROGRESS. (LP: 8844868. AIRCRAFT WAS GROUJul 21, 2026 · N361NW · Airbus A320212SDR N6WA2026070205Gearbox · bindingN1, ITT, N2, THRUST FLUCTUATIONS IN FLIGHT AT HIGH THRUST SETTINGS ON RH ENG. PERFORMED BORESCOPE OF THE NR 2 ENG IAW AMM 72-00-0. UPON FURTHER INSPECTION FOUND THE AGB TO BE BINDING.Jun 30, 2026 · N536GJ · Cndair CL6002C11SDR 2026F00138Carbon Seal · leakingDURING CRUISE THE A/C FACE RT OIL PRESSURE LT INTERMITTENT ILLUMINATION AND RT ENG QTY INDICATION 0. OIL PRESS FLUCTUATES DOWN 1 TO 27 TEMP NORMAL. CREW REPORTED THAT APPROXIMATELY TWO HOURS PRIOR TO ARRIVAL, INTERMITTENT ENG2 OIL PRESSURE WARNING INDICATIONSJun 29, 2026 · N652UA · Boeing 767322SDR 2026F00066Seal · leakingLOW OIL QTY INDICATION WITH LOW PRESSURE INDICATION, UNSCHEDULED LANDING, VFSG LH OF ENGINE NR 1 WAS REPLACED IAW AMM DMC B787-A-24-21-09-00B-520A-A/720A-A. ENGINE VENTS AND DRAINS INSPECTION WAS PERFORMED IAW DMC-B787-A-G71-00-00A-280A-A, REPLACEMENT OF Mar 28, 2026 · N966AM · Boeing 7878SDR DALA2025110908156Gearbox · making metalDIVERTED TO MCO DUE TO RIGHT ENGINE OIL LOSS AND N2 VIBES. INSPECTED MCD'S AND FOUND METAL ON AGB, NR 3 AND 4 MCD'S. REPLACED RIGHT ENGINE. (LP 7657484, 1291223)Nov 7, 2025 · N537DT · Airbus A321271NXSDR ASMF2025111100304Seal · leakingDURING WALKAROUND FOUND SIGNS OF OIL LEAKS COMING FROM HEATER DRAIN VFSG RIGHT PAD ON ENGINE 2. SIX DROPS PER MINUTE. RIGHT VFSG ACCESORY GEARBOX SEAL ENG # 2 WAS REPLACED IAW AMM DMC-787-A-G72-64 -01-00A-520A-A /Nov 2, 2025 · N966AM · Boeing 7878SDR 2025FA0000687Bearing · spalledIDLER GEAR [PN: 896804-2] TEETH GALLED DUE TO BEARINGS (2EA) [PN: 3103035-1, SN: 10-151725-07307 & 10-151725-07323, TSN: 5,558.3] WORN AND SPALLING. RESULTED IN UNCOMMANDED SHUTDOWN OF ENGINE DUE TO FUEL PRESSURE LOSS.Oct 7, 2025 · N320MC · Swrngn SA227ACSDR CALA2025090308441Gearbox · contaminatedNUMBER 1 ENG OIL FILTER BYPASS OCCURED ATFL270 300KIAS, DELCARED EMERGENCY LANDING. DURING INSPECTION, FOUND DEBRIS ON AGB/TGB SCAVENGE MCD. EXAMINED STARTER MAGNETIC PLUG CONTAMINATION REF AMM TASK 79-00-00-200-804-F00. NO PARTICLES FOUND.Aug 31, 2025 · N69833 · Boeing 737924ERSDR NACA2025031300007Housing · leakingFUEL LEAK #1 ENGINE ACCESSORY GEARBOX FORWARD MID LOWER MAIN FUEL CONTROL HOUSING. LEAK CHECK, NO LEAK FOUND.Mar 13, 2025 · N321CM · Boeing 767323SDR FXTA20250404003Pressure Switch · failedPROP DE-ICE CAS MESSAGE ON RUN-UP. FOUND LH & RH LOW OIL PRESSURE SWITCHES WERE FAILED.Feb 19, 2025 · N408BA · Textrn 408SDR 2025FA0000115Shaft · wornACCESSORY GEAR AND DRIVE IDLER ASSEMBLY [PN: 3103599-2, SN: 10P27504] FOUND DAMAGED DURING 7,000 HOUR OVERHAUL PERIODIC INSPECTION. DAMAGE FOUND DURING INSPECTION INCLUDED SPLINED SHOULDERED SHAFT [PN: 3103405-3] SPLINES AND SHAFT SURFACES WORN. SPUR GEAR [PN:Feb 18, 2025 · Cessna 208BSDR 2024FA0000972Bearing · wrong partON OCTOBER 8 2024, AGB (ENGINE LEAP 1A) P/N 362-001-242-0 S/N 1P000802 WAS RECEIVED BY STS MAINTENANCE ORGANIZATION (EASA FR.145.0229, FAA H31Y132O) FOR INSPECTION/REPAIR AND MODIFICATION (NOT RELATED TO THIS EVENT) FROM CUSTOMER. THIS AGB WAS NEVER SERVICEDDec 19, 2024SDR 2024F00312Gearbox · damagedON 2024-11-26, DURING THE DISASSEMBLY OF, IT WAS DISCOVERED THAT THREE 'TEN-POINTS NUTS' WHERE MISSING ON LINE 4, ON THE COVER SIDE (P/N J626P04). CONSEQUENTLY, THE OIL RETAINING RING WAS NOT FIXED INTO POSITION. PIECES OF IT WERE TORN OFF AND FOUND AT THE BDec 9, 2024 · Boeing 737SDR ZD4R202410040001Shaft · brokenDISASSEMBLED GEARBOX AND FOUND 2 BROKEN TEETH ON TORQUEMETER GEARSHAFT. GEAR TEETH WERE LOCATED AT BOTTOM OF GEARBOX. MINOR METAL DEBRIS FOUND ON MAGNETIC CHIP DETECTORS. MINOR DAMAGE TO GEARBOX COVER AND HOUSING ASSEMBLY.Oct 4, 2024 · N36VA · Bell 407SDR 2024FA0000557Spur Gear · crackedIN FLIGHT SHUTDOWN OF ENGINE [TPE331-12UHR-702H, PN: 3103380-53]. SPUR GEAR CRACKED / MISSING TEETH [PN: 3103406-2] CAUSING LOSS OF FUEL.Aug 1, 2024SDR DALA2024071107038Scavenge Pump · faultedSHIP 667-ATB/IFSD/DE- PERFORMED AIR TURN BACK WITH DECLARED EMERGENCY DUE TO LEFT ENGINE OIL TEMP IN THE AMBER BAND FOR 20 MINUTES. FLIGHT CREW PERFORMED IFSD PER QRH. CORRECTIVE ACTION: INSPECTED MCD'S, ALL CLEAN. DRAINED 4 QUARTS FROM MAIN GEARBOX. REPLACED Jul 10, 2024 · N667DN · Boeing 757232SDR DALA2024070506818Gearbox · making metalSHIP 6711 -DIV/IFSD/DE- DIVERSION TO MSY DUE TO RIGHT ENGINE OIL FILTER ADVISORY MESSAGE. CREW FOLLOWED QRH AND SHUTDOWN ENGINE. CORRECTIVE ACTION: INSPECTED MCD'S AND OIL FILTER, FOUND METAL DEBRIS ON MAIN AND GEARBOX MCDS. ANALYZED MATERIAL AND FOUND 52100 BJul 3, 2024 · N6711M · Boeing 757232SDR DALA2024070506817Gearbox · making metalSHIP 6711 -DIV/IFSD/DE- DIVERSION TO MSY DUE TO RIGHT ENGINE OIL FILTER ADVISORY MESSAGE. CREW FOLLOWED QRH AND SHUTDOWN ENGINE. CORRECTIVE ACTION: INSPECTED MCD'S AND OIL FILTER, FOUND METAL DEBRIS ON MAIN AND GEARBOX MCDS. ANALYZED MATERIAL AND FOUND 52100 BJul 3, 2024 · N6711M · Boeing 757232SDR DALA2024050805029Gearbox · overservicedSHIP 3408 DIRTY SOCK SMELL. CORRECTIVE ACTION: ENGINE GEARBOX WAS OVERFILLED WITH OIL. DRAINED AND RE-FILLED TO CORRECT LEVEL. CLEANED ALL OVERFLOW OIL. REPLACED CABIN FILTERS. OK FOR SERVICE. (0329644)May 6, 2024 · N408DX · Airbus A330941SDR 2024F00048Gearbox · abnormalON 21 FEBRUARY 2024, SAFRAN TRANSMISSION SYSTEM APPROVED MAINTENANCE ORGANISATION (EASA FR.145.0229, CAAC F03300629, FAA H31Y132O), WHILE DISASSEMBLING ACCESSORY GEARBOX (AGB), P/N 340-046-508-0, S/N WZ7492, FOR AN UNRELATED MAINTENANCE OPERATION, DETECTED THAMar 4, 2024SDR 2024F00047Gearbox · abnormalON 19 FEBRUARY 2024, SAFRAN TRANSMISSION SYSTEM APPROVED MAINTENANCE ORGANIZATION (EASA FR.145.0229, CAAC F03300629, FAA H31Y132O), WHILE DISASSEMBLING TRANSFER GEARBOX (TGB), P/N 340-050-704-0, S/N VQ1169, FOR AN UNRELATED MAINTENANCE OPERATION, DETECTED Mar 4, 2024SDR 2023FA0000668Bearing · galledACCESSORY GEAR [PN: 3103590-2] BEARING GALLED [PN: 3103585-1, SN: 13-151725-07567, TSN: 4,525.7, CSN: 5,527]. RESULTED IN FAILED SOAP REPORT DUE TO M50 PLATELET DETECTION.Oct 17, 2023SDR 2023FA0000277Gearbox · incorrectTHE ENGINE ABOVE WAS FITTED WITH ACCESSORY GEARBOX (AGB) P/N: 340-046-508-0, SN: WZ5025. DURING THE DISASSEMBLY, THE OPERATOR NOTICED THAT THE COVER WAS HELD IN PLACE BY 8 SCREWS P/N "AS3237-08" WHILE THE APPROVED DATA (ESM SM10 REV63 SECTION 726300) SPECIFIMay 26, 2023 · Boeing 737*SDR CALA2023010400022Nozzle · leakingOIL QUANTITY INDICATION (ENGINE) SHOWS LOW FIM TASK 31-90-F8-03A-421B-A. RT ENGINE TEST NR 1 - DRY-MOTOR - LEAK TESTED IAW MM B787-A-G71-00-00-48A-364A-A. LEAK CONFIRMED AT FWD FACE ACCESSORY G/B OIL NOZZLE PACKING REF 72-64-00-03 ENG AGB ASSY-HOUSING, OIL Jan 4, 2023 · N38955 · Boeing 7879SDR PCSA202301040001Gearbox · faultedON FLIGHT 99 FROM ICN TO ANC, TEN MINUTES INTO THE FLIGHT, THE FLIGHT CREW REPORTED A HIGH ENGINE VIBRATION ON #2 ENGINE, FOLLOWED BY RELATED FIRE WARNING. THE CREW PROCEEDED TO DISCHARGE BOTH FIRE BOTTLES AND PERFORMED EMERGENCY PROCEDURES, RETURNING TO ICN Jan 3, 2023 · N496MM · Boeing 767300SDR 2022FA0000769Bevel Gear · wornDURING MINOR EGB REPAIR, PREMATURE BEVEL GEARS WEAR IS IDENTIFIED (EXCESSIVE WEAR), AND GEARS REMOVED. THIS IS OUTSIDE ICA REQUIREMENTS AND STANDARD PRACTICES. WHEN INVESTIGATING ON PREVIOUS REPAIRED EGBS, 6 EGBS WHERE AFFECTED BY SIMILAR WEAR.Dec 19, 2022 · Airbus A330*SDR 2022FA0000731Line · leakingSMOKE COMING OUT OF PILOTS SIDE VENT IN FLIGHT. UPON INVESTIGATION AFTER LANDING, IT WAS DISCOVERED THAT THE LINES GOING TO THE COMPRESSOR WERE LEAKING FREON.Nov 22, 2022 · N865MA · Cessna 208BSDR 2022F00447Gearbox · contaminatedCUSTOMER REPORTED AOG ON SEPT 19, 2022 FOR MAGNETIC DEBRIS FOUND DURING REGULAR MCD INSPECTION. ENGINE WAS REMOVED AND AGB RETURNED TO SHOP. SHOP DID PERFORM THE LAST SHOP VISIT (AGB RELEASED ON JUNE 23, 2022 AS MODIFIED, 539.0 HOURS / 238 CYCLES SINCE THE RNov 4, 2022SDR 9JLA2022100739009Seal · leakingDURING POST-FLIGHT CHECKS THE MAINTENANCE TECH DISCOVERED AN OIL LEAK FROM THE NO3 ENGINE. THE MAINTENANCE PROVIDER FOUND A LIP SEAL ON THE ACCESSORY GEARBOX FOR THE FUEL PUMP LEAKING. THE DEFECTIVE SEAL WAS REMOVED, AND A NEW CONDITION SEAL INSTALLED. LEAK CHOct 5, 2022 · N910TX · Amd FALCON900BSDR 2022FA0000399Gearbox · shearedN648KM SUFFERED A GEARBOX SHAFT FAILURE ON ENGINE S/N 02-02-11284 @ 115 ENGINE HRS. THIS HAPPENED WHILST CONDUCTING POST MAINTENANCE GROUND RUNS FOLLOWING THE ANNUAL/100HR ENGINE INSPECTIONS IAW OEM REQUIREMENTS. A 100% POWER RUN WAS CARRIED OUT WITH THE ENGIJul 27, 2022 · N648KM · Diamon DA42SDR 2022F00229Engine · corrodedRH ENGINE AGB AFT COVER IS CORRODING.May 16, 2022 · N512QS · Cessna 680ASDR 2022F00228Engine · corrodedLH ENGINE AGB AFT COVER IS CORRODING.May 16, 2022 · N512QS · Cessna 680ASDR 2021FA0000431Gearbox · corrodedLH ENGINE AGB HAS CORROSION UNDER HYDRAULIC PUMP.Dec 31, 2021 · N620QS · Cessna 680ASDR 2021F00350Engine · corrodedRH ENGINE AGB CORRODED IN MULTIPLE LOCATIONS.Dec 15, 2021 · N542QS · Cessna 680ASDR 2021FA0000395Engine · corrodedRH ENGINE AGB REAR COVER HAS MULTIPLE AREAS OF CORROSION.Dec 13, 2021 · N536QS · Cessna 680ASDR 2022F00017Engine · corrodedLH ENGINE AGB REAR COVER HAS MULTIPLE AREAS OF CORROSION.Dec 13, 2021 · N536QS · Cessna 680ASDR 2021FA0000394Engine · corrodedRH ENGINE AGB COVER HAS MULTIPLE AREAS OF CORROSION.Dec 13, 2021 · N536QS · Cessna 680ASDR 2021FA0000393Engine · corrodedLH ENGINE AGB REAR COVER HAS MULTIPLE AREAS OF CORROSION.Dec 13, 2021 · N536QS · Cessna 680ASDR 2021FA0000309Gearbox · corrodedRH ENGINE GEARBOX AFT COVER CORRODED IN MULTIPLE LOCATIONS.Nov 2, 2021 · N548QS · Cessna 680ASDR 2021FA0000308Gearbox · corrodedLH ENGINE GEARBOX AFT COVER CORRODED IN MULTIPLE LOCATIONS.Nov 2, 2021 · N549QS · Cessna 680ASDR 2021F00208Cover · corrodedTHE ACCESSORY GEARBOX REAR COVER IS CORRODING ON THE FLANGES AND AROUND BOLT HOLES. ACCOMPLISHED STEPS (1) THRU (4) OF THE REPAIR OF CORROSION OR PITTING ON ABG MOUNT PADS AND EXTERNAL SURFACES. INSPECT AGAIN AND REPEAT STEPS (1) THRU (4) AT EVERY AIRCRAFT MINOct 16, 2021 · N578QS · Cessna 680ASDR 2021F00207Cover · corrodedTHE ACCESSORY GEARBOX REAR COVER IS CORRODING ON THE FLANGES AND AROUND BOLT HOLES. ACCOMPLISHED STEPS (1) THRU (4) OF THE REPAIR OF CORROSION OR PITTING ON ABG MOUNT PADS AND EXTERNAL SURFACES. INSPECT AGAIN AND REPEAT STEPS (1) THRU (4) AT EVERY AIRCRAFT MINOct 16, 2021 · N578QS · Cessna 680ASDR 2021F00279Mount · corrodedRH AGB AFT SIDE HAS CORROSION ON OIL LINE MOUNTING PAD JUST INBOARD OF HYDRAULIC FAN.Oct 4, 2021 · N649QS · Cessna 680ASDR 2021F00278Mount · corrodedAFT SIDE OF LH AGB OUT BOARD SIDE HAS TWO OIL LINE MOUNTING PADS WITH CORROSION.Oct 4, 2021 · N649QS · Cessna 680ASDR 2021FA0000277Cover · corrodedTHE ACCESSORY GEARBOX REAR COVER IS CORRODING ON THE FLANGES AND AROUND BOLT HOLES. ACCOMPLISHED STEPS (1) THRU (4) OF THE REPAIR OF CORROSION OR PITTING ON ABG MOUNT PADS AND EXTERNAL SURFACES. INSPECT AGAIN AND REPEAT STEPS (1) THRU (4) AT EVERY AIRCRAFT MINOct 3, 2021 · N559QS · Cessna 680ASDR 2021F00253Cover · corrodedTHE ACCESSORY GEARBOX REAR COVER IS CORRODING ON THE FLANGES AND AROUND BOLT HOLES. ACCOMPLISHED STEPS (1) THRU (4) OF THE REPAIR OF CORROSION OR PITTING ON ABG MOUNT PADS AND EXTERNAL SURFACES. INSPECT AGAIN AND REPEAT STEPS (1) THRU (4) AT EVERY AIRCRAFT MINOct 3, 2021 · N559QS · Cessna 680ASDR 2021F00246Gearbox · corrodedRH ENGINE GEARBOX AFT COVER CORRODED IN MULTIPLE LOCATIONS.Aug 25, 2021 · N550QS · Cessna 680ASDR 2021F00245Gearbox · corrodedLH ENGINE GEARBOX AFT COVER CORRODED IN MULTIPLE LOCATIONS.Aug 25, 2021 · N550QS · Cessna 680ASDR 2021FA0000228Gearbox · corrodedL/H ENGINE AGB AFT SIDE SHOWS SEVERAL AREAS OF CORROSION AND WAS REPAIRED IAW P&W MAINTENANCE MANUAL PART NO. 30B7302 72-60-01 B.Aug 10, 2021 · N509QS · Cessna 680A
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