JASC 4920

Service difficulty reports · 2,430

Reports filed under 4920 · APU Core Engine, 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 = '4920'
  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 DALA2025101507525Intake · contaminatedFA'S REPORTED DIRTY SOCK/MUSTY SMELL ODOR THROUGHOUT CABIN FROM TOP OF DESCENT TO TOUCH DOWN. NOTHING DETECTED IN COCKPIT. FOUND INTAKE AREA CONTAMINATED WITH OIL AND EVIDENCE COMING FROM COMPRESSOR. APU TO BE REPLACED. (LP 7781906, 7781907)Oct 13, 2025 · N381DZ · Airbus A321211SDR DALA2025101307453Inlet · contaminatedON THE GOURND, AFTER 5 MIN OF APU RUNNING, DIRTY SOCK ODOR/SMELL PRESENT AFTER SELECTING APU BLEED ON. SMELL SEEMS TO DISSAPATE AFTER SELECTING BLEED OFF. PERFORMED SMOKE AND FUME T/S IAW A320 AMDS WORKCARD # 0550-2002. FOUND SOURCE TO BE APU INLET DUCT CONTAOct 13, 2025 · N336NW · Airbus A320212SDR YENA2025101401019Plenum · contaminatedFLT#1573, EWR-LAX. "ON DESCENT NEAR 10000FT INFLIGHT SMELLED STRONG ODOR. DISSIPATED OVER TIME SMELL NEVER WENT AWAY. BRIEF FAINT SMELL IN COCKPIT; REF INFO NOTICE 2017-T015L AND TSM 05-50-00-810-831-A. FOUND OIL RESIDUE IN APU INTAKE PLENUM ACCOMP DECONTAMINAOct 10, 2025 · N988JT · Airbus A321231SDR AALA202510103967Apu · odorAIRCRAFT WAS GROUNDED: SOF EVENT AFTER TAKEOFF, THEN DISSIPATED MIC 1580902. MAINTENANCE DETERMINED APU WAS SOURCE OF ODOR AND REPLACED APU IAW J/C 26L31049003.Oct 6, 2025 · N521UW · Airbus A321231SDR ABXA20251003243Apu · faultedON PUSHBACK APU SHUTDOWN, ACFT RETURNED TO THE GATE (BTB) AND MTX GROUNDED ACFT . MTX PERFORMED APU START, 1ST ATTEMPT APU START CHECKS GOOD IAW AMM 49-11-00. ACFT REMAINS NO ETOPS. AND RETURNED AC TO SERVICE.Oct 3, 2025 · N1427A · Boeing 767306SDR AALA202510016568Apu · failedAIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: APU FAILED IN FLIGHT, CAUSED A SINGLE SOURCE OF ELECTRICAL SOURCE. AIRCRAFT DIVERTED TO AND LANDED SAFELY AT MEM. (OPEN).Sep 30, 2025 · N963NN · Boeing 737823SDR SIMA20250910001Blade · damagedDURING APU SHUTDOWN THERE WAS A LOUD BANG, APU SHUT DOWN IMMEDIATELY, LARGE CLOUD OF SMOKE SHOT OUT OF THE EXHAUST AS WELL AS LARGE PIECES OF METAL. DURING INSPECTION OF APU FOUND APU TAILCONE INNER LINER TO BE DAMAGED FROM THE EXPLOSION. FOUND 4 HOLES AND THESep 10, 2025 · N216NN · Emb ERJ170200LRSDR HALA20250830266Apu · shutdownETOPS - APU AUTO SHUTDOWN. PER ENGINEERING REMOVED AND REPLACED FLOW DIVIDER ASSY PER AMM 49-31-51. LEAK CHECK OK, CONDITION SAME. REINSTALLED ORIGINAL FLOW DIVIDER. REMOVED AND REPLACED APU PER T/C 330-49-HWI-02. OPS/LEAK CHECK GOOD. OK FOR SVC.Aug 29, 2025 · N396HA · Airbus A330243SDR 2025FA0000582Shaft · mismanufacturedMAINTENANCE AND REPAIR PROBLEM : REPAIR DONE WITHOUT APPROVED DATAS BY A MRO, THE SHAFT DESIGN AT ONE END IS MISSING TWO HOLES FOR THE OÏL ENGINE LUBRIFICATION. THE APU HAS BEEN ANNOUNCED WITH OÏL LEAKAGE AFTER 270 HOURS OF SERVICES SINCE LAST OVERHAUL.Aug 27, 2025 · N482MC · Boeing 747443SDR YENA2025082500873Controller · faultedFLT#33, BOS-CDG. (ETOPS) "APU MAINTENANCE MESSAGE ( CLASS II MAINTENANCE MESSAGES DISPLAYED ); PERFORMED REMOVAL AND REPLACEMENT OF APU LOAD CONTROL VALVE PER AMM 49-51-51. OPS CHECK GOOD NO FAULTS APPEAR ON ECAM, NO LEAKS NOTED. AIRCRAFT SYSTEM RESPONDS NORMAAug 25, 2025 · N4076J · Airbus A321271NXSDR I5PA2025082168803Apu · inoperativeAPU INOPERATIVE. R & R APU IAW AMM.Aug 21, 2025 · N688SL · Boeing 757230SDR HEEA202508180001Apu · inoperativeDURING THE EXECUTION OF BEFORE LANDING CHECKS, THE AUXILIARY POWER UNIT (APU) FAILED TO START, AND THE APU FAIL CAUTION LIGHT ILLUMINATED. THE CREW FOLLOWED THE APPROPRIATE PROCEDURES CHECKLIST AND RETURNED THE AIRCRAFT TO THE HOUMA HELIPORT.Aug 15, 2025 · N950PH · Skrsky S92ASDR YENA2025081300832Intake · contaminatedFLT#525, PVD-SJU. "FUMES NOTICIED IN AFT CABIN BY FA'S VERY STRONG SMELL OF BURNT FUEL OR HYDRAULICS THE SMELL IS REDUCED AFTER PACK 2 0FF; DURING THE PROCEDURES FOLLOWED TO HANDLE THIS ODOR EVENT, THE SOURCE OF THE ODOR WAS FOUND TO BE APU, ALSO FOUND THE AIRAug 11, 2025 · N641JB · Airbus A320232SDR HALA20250811243Union · brokenETOPS - FOUND APU DRAIN LINE UNION NUT BROKEN. REMOVED AND REPLACED APU DRAIN LINE UNION NUT PER AMM 49-17-00, RUN APU FOR 5 MINS. NO LEAK NOTED. A/C OK FOR SVC.Aug 10, 2025 · N396HA · Airbus A330243SDR AALA202508087754Apu · odorAIRCRAFT WAS GROUNDED: STRONG MUSTY ODOR COMING FROM THE PACKS ON THE GROUND AND IN THE AIR. MX VERIFIED APU SOURCE, PLACED ON MEL. (OPEN)Aug 6, 2025 · N109UW · Airbus A320214SDR NACA2025080500002Apu · malfunctionedAPU WILL NOT START. PERFORMED APU STARTING AND OPERATION PER AMM 49-11-00, OPS CHECK OKAY.Aug 5, 2025 · N567NC · Boeing 76733ASDR AALA202508110927Apu · contaminatedAIRCRAFT WAS GROUNDED: DIRTY SOCK SMELL ON DESCENT IN FLIGHT DECK. MAINTENANCE ACCOMPLISHED SMOKE / ODOR / FUME APU TROUBLESHOOTING TASK CARD 26L00021002 AND A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014 WITH NO ODORS NOTED. Aug 4, 2025 · N980UY · Airbus A321231SDR IXXA20250726037Apu · sparksUPON INITIAL WALK AROUND SPARKS WERE SEEN COMING OUT OF THE EXHAUST BEFORE APU SHUT DOWN. ACCOMPLISHED BORESCOPE FOUND DAMAGE TO BE BEYOND ALLOWABLE LIMITS. REMOVED AND REPLACED APU IAW ATI TASK CARD JC-49-999-00-01. ALL OPERATIONAL AND LEAK CHECKS GOOD.Jul 26, 2025 · N449AZ · Boeing 7673P6SDR HALA20250721225Transducer · faultedETOPS - APU FAULT. APU SHUTDOWN , 2 START TATTEMPTS. PERFORMED TSM TASK 49-62-00-810-844-A. REMOVED AND REPLACED APU INLET PRESSURE TRANSDUCER PER A330 AMM 49-23-17. OPS CHK GOOD. OK FOR SVC.Jul 20, 2025 · N375HA · Airbus A330243SDR CALA2025070806315Inlet · contaminatedAPU BLEED AIR EXHAUST SMELL IN CABIN ODOR. T/S REF FIM 49-55 TASK 801. PERFORMED VISUAL INSPECTION OF APU AND FOUND RESIDUAL OIL NEAR AIR INLET DUCT. CLEANED AREA THOROUGHLY AND RAN APU WITH BLEED FOR APPROXIMATELY 1 HOUR. COULD NOT REPLICATE ODOR IN AIR. VERJul 7, 2025 · N78438 · Boeing 737924ERSDR DALA2025071005211Inlet · contaminatedAIRCRAFT 3029, DIRTY SOCK SMELL FUMES ON TAXI OUT THROUGH 8'000FT VERY FAINTLY. DISSEPATED IN THE CLIMB RETURNED ON DESCENT AT 7500FT COCKPIT WENT UP OXYGEN ENGINES OFF AT GATE. APU OFF FOR DURATION. PACK 1 ISOLATED PER QRH. FOUND OIL IN APU INLET. CORRECTIVE Jul 6, 2025 · N329DN · Airbus A321213SDR IPXA2025071644664Strap · corrodedAPU INLET FWD STRAP HAS CORROSION UNDERNEATH. INSTALLED NEW STRAP IAW SRM 51-40-02Jul 3, 2025 · N407UP · Boeing 75724APFSDR WX0A2025070732484Plenum · contaminated(AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL OBSERVED DECENDING BELOW 10'000' SMELLED BY CA AND FO / CLEANED APU AIR INTAKE & PLENUM IAW 49-16-00-100-005-A. OPERATED APU & PACKS 1 & 2 - PRECONDITIONED BLEED SYSTEM. OP CK GOOD. NO ODORS DETECTED. C/W THE LEVELJul 3, 2025 · N271NV · Airbus A320214SDR GTIA2025062638969Intake · contaminatedCHEMICAL SMELL THROUGHT THE AIRCRAFT.-REF TSM 05-50-00-810-831-A SUSPECTED APU AT FAULT PER DECSION TABLE. PERFORMED LEVEL B/C INSPECTION OF THE APU PER AMM 49-00-00. FOUND NO OIL OR FUEL LEAK. FOUND HOWEVER, WATER RESTING IN THE APU AIR INTAKE. PERFORMED CLEAJun 25, 2025 · N993NK · Airbus A320271NSDR 2025FA0000436Duct · crackedDURING THE POSTFLIGHT GENERAL VISUAL INSPECTION, NOTICED SMALL CRACK IN THE APU LOWER AIR INLET DUCT ASSEMBLY'S REAR SIDE CORNER. DAMPING MATERIALS REMOVED FROM THE DUCT ASSEMBLY AND THOROUGH INSPECTION REVEALED BIG CRACK IN THE LEFT SIDE OF THE DUCT ASSEMBLY.Jun 21, 2025 · Cndair CL600*SDR VNAA20250716006Exhaust Duct · dentedAFTER REMOVAL TAILCONE EXHAUST CONE IN REF NRC 0038, BENT AND DENTS (4EAS) WERE FOUND. CORRECTIVE ACTION: BENT AND DENTS (4EAS) ON TAILCONE EXHAUST CONE WERE REPAIRED PER REO 690-53-85-107 REV. - -Jun 12, 2025 · N599NN · Bombdr CL6002D15SDR NACA2025061000001Apu · hung startAPU HUNG STARTJun 10, 2025 · N565NC · Boeing 7673BGSDR SWAA2025060678633Apu · failedDRIVE #2 LIGHT CAME ON DURING LANDING MX VERIFIED APU OIL QTY IS FULL 22-APR-2025 14:21 UTC FAULT: FLIGHT CREW REPORTS #2 ENG DRIVE LIGHT TEMPORARILY ILLUMINATED THEN EXTINGUISHED AFTER LANDING. ACTION: INSPECTED #2 ENG DIG FOUND LOW ON OIL. SERVICED IDG. REF Jun 5, 2025 · N246LV · Boeing 7377H4SDR DALA2025060104201Apu · contaminatedAIRCRAFT 3001, ACRID WET SOCK SMELL NOTICED DURING TAXI BACK IN REAR OF AIRCRAFT. CORRECTIVE ACTION: OIL FOUND IN APU INLET. COMPLETED A321 AMM TASK 21-00-615-803-A PARA1 THRU 4.F(C)4. STAGE 1 CLEANING OF ECS COMPLETED STAGE 2 USING HP GROUND AIR REF. A321 AMMMay 29, 2025 · N301DV · Airbus A321213SDR NACA2025052800002Apu · inoperativeAPU FAILED TO START WHILE USING BATTERY AFTER REPOSITION. ADJUSTED IGV ACTUATOR BELL CRANK AND BLOCK ASSY. ALSO CONFIRMED IGV ROD DIMENSION A IN REF 767 AMM 49-52, APU OPS CHECK OK WITH BATTERY.May 28, 2025 · N566NC · Boeing 7673BGSDR NACA2025052700002Actuator · failedAPU WOULD NOT START ON 3 ATTEMPTS. GOES TO 30% BUT WILL NOT ADVANCE WITH APU FAULT LIGHT ILLUMINATED. DEFERRED PER MEL 49-11-01A. REMOVED AND REPLACED IGV ACTUATOR IAW 767 AMM 49-52-02 OPS AND LEAK CHECK GOOD.May 27, 2025 · N566NC · Boeing 7673BGSDR NACA2025050700001Apu · faultedAPU DID NOT START (3 ATTEMPTS). PERFORMED APU BITE IAW FIM 49-11 FT 927 NO FAULTS NOTED.May 7, 2025 · N566NC · Boeing 7673BGSDR NACA2025042400001Apu · no discrepancyAPU FAULT 3 ATTEMPTS. DEFERRED APU PER MEL 49-11-01A CAT C. ACCOMPLISHED APU BITE PROCEDURE PER FIM 49-11-FT 987. MINIFLAG SUMMARY SHOWED NO FAULT CODES. CLEARED MEMORY AND STARTED APU, NORMAL OPERATIONApr 24, 2025 · N566NC · Boeing 7673BGSDR AALA202504175109Injector · dirtyAIRCRAFT WAS GROUNDED: MUSTY DIRTY SOCK ODOR NOTICED ON TAKEOFF. FOUND APU OIL OVERSERVICED BY 2.1 PINTS, REMOVED 2.1 PINTS FROM OVERSERVICED APU (AALA202504176485), PER AMM 12-13-31. REPLACED NUMBER 1 PACK FLEXIBLE SLEEVE (AALA202504170190) FORWARD OF CONDENSApr 16, 2025 · N826NN · Boeing 737823SDR YENA2025040900373Isolation Valve · disengagedFLT#523, JFK-LAX. (ETOPS).' APU INOP ( APU SYSTEM A321NEO ETOPS ); ACCOMPLISHED RE-ACTIVATION OF APU FWD ACT ISOLATION VALVE & APU PER AMM 28-28-00-440-005-A. & ALSO ACCOMPLISHED OPS CHECK & GROUND VERIFICATION PER AMM SUBTASK 28-28-71-710-050-A LETTER D. RAN Apr 6, 2025 · N4080J · Airbus A321271NXSDR QXEA2025032400070Apu · sparksFLIGHT 2064. AFTER STOPPING ACFT AT THE GATE, ENGINES SHUT DOWN, LOST A/C POWER, ASSOCIATED WITH APU FAIL CAUTION. RAMP PERSONNEL HEARD A LOUD BANG FROM THE APU OBSERVED SPARKS AND SMOKE FROM APU TAILPIPE. PLACED APU ON MEL 49-00-00. RETURNED TO SERVICE.Mar 23, 2025 · N642QX · Emb ERJ170200LRSDR DALA2025032202153Apu · contaminatedSHIP 3245 - FUME - DECLARED EMERGENCY DUE TO REPORTED ODOR IN THE FLIGHT DECK AND CABIN. CORRECTIVE ACTION: FOUND EVIDENCE OF DE-ICE FLUID IN APU INLET. NO OTHER CONTAMINATION FOUND. COMPLIED WITH LEVEL B DECONTAMINATION AND RETURNED TO SERVICE. (LP: 7162988)Mar 21, 2025 · N345NW · Airbus A320212SDR NACA2025031100001Actuator · failedACCOMPLISHED FIM 49-11 FT 987 BITE PROCEDURE FOUND FAULT CODE MINIFLAG 126. REMOVED AND REPLACED APU INLET GUIDE VANE ACTUATOR IAW AMM 49-59-02. TRAX PART TIME UNAVAILABLE.Mar 11, 2025 · N566NC · Boeing 7673BGSDR NACA2025031710001Pneumatic System · inoperativeAPU PNEUMATICS INOP, 5 PSI OUTPUT. DEFERRED PER MEL 49-11-01-01Mar 11, 2025 · N566NC · Boeing 7673BGSDR HEEA202503100001Apu · failedBEFORE LANDING OFFSHORE, APU FAIL LIGHT ILLUMINATED. EMERGENCY PROCEDURE PERFORMED. RETURNED TO HOUMA.Mar 5, 2025 · N936PH · Skrsky S92ASDR AALA202503105271Apu · dirtyAIRCRAFT WAS GROUNDED: FLT ATTENDANTS COMPLAINED OF AN ODOR IN THE CABIN DURING CRUISETHROUGH WEATHER AND IN THE DESCENT MOST PRONOUNCED IN AFT CABIN. **SUPPLEMENTAL REPORT FOR SDR AALA202502285271.** (CLOSED) MAINTENANCE PERFORMED DETAIL INSPECTION AND CLEANEFeb 25, 2025 · N9010R · Airbus A319115SDR DALA2025030301598Apu · contaminatedCREW REPORTS ODOR IN CABIN AFTER BLEED SWITCH FROM ENG DURING TAXI IN. NSP # 1 & 2 ENGINE AND APU /COMPARTMENT NO OIL CONTAMINATION NOTED. PERFORMED WORK CARD 0550-2001 , WITH # 1 & 2 ENGINES RUNNING AND PACKS ON STARTED APU AND BLEED BRIEF ODOR FOR 30 SECONDSFeb 25, 2025 · N330DU · Airbus BD5001A11SDR YENA2025022500193Cooling Fan · leakingFLT#1979, DCA-FLL. 'UPON LANDING INFLIGHT WORKING REAR OF AIRCRAFT COMPLAINED OF ODOR ON DECENT, NO SMELL IN COCKPIT OR FRONT CABIN; FOUND APU COOLING FAN LEAKING REF LOG PG 4236461-2 COMPLIED WITH INFORMATION NOTICE 2017-T015, SECTION B2. LEVEL 1 TYPE 1 WAS PFeb 25, 2025 · N571JB · Airbus A320232SDR DALA2025022601485Inlet · contaminatedSHIP 3269 - SMOKE - DECLARED EMERGENCY DUE TO VISIBLE SMOKE IN THE COCKPIT AND MID CABIN DURING LANDING. CORRECTIVE ACTION: FOUND APU INLET CONTAMINATED. DEFERRED APU PER MEL.Feb 23, 2025 · N369NW · Airbus A320212SDR QXEA2025021700026Apu · failedFLIGHT 2380. DURING ENGINE START, WE HAD AN APU FAIL WITH A LOUD BANG. SPARKS WERE SEEN COMING OUT OF THE APU, SMOKE AND SPARKS WERE SEEN COMING OUT OF THE #1 ENGINE, POWER WAS TEMPORARILY LOST THRU THE PLANE. RETURNED TO THE GATE REMOVED FROM SERVICE. PERFORMFeb 15, 2025 · N643QX · Emb ERJ170200LRSDR NACA2025071704Apu · faultedAPU DID NOT START AFTER LANDING. PERFORM TROUBLESHOOTING AS REQ OR83208 02/06/25 1. OPENED APU DOOR ACCESS PANELS 315AL & 316AR IAW AMM 12-13-04-200-801 STEP D. PERFORMED APU OIL CHECK IAW AMM 12-13-04-200-801 FOUND LWR OIL LEVEL. PERFORMED APU OIL FILL IAFeb 4, 2025 · N379CX · Boeing 767323SDR DXTA2025012902106Apu · odorWHEN THE APU WAS STARTED AND BLEED AIR IS ON THERE IS AN OILY MUSTY SMELL COMING FROM THE BLEED AIR. TURN BLEED AIR OFF AND IT DISIPATES. CAN NOTICE A VERY SLIGHT HAZE IN THE COCKPIT AS WELL AS THE SMELL. REPLACED APU. OPS CHECK GOOD. IAW CE-700 AMM 49-10-00Jan 25, 2025 · N837QS · Textrn TEXTRON700SDR AALA202502111724Apu · odorAIRCRAFT WAS GROUNDED: DESCENDING BELOW 15000FT A LIGHT "DIRTY SOCK SMELL" BEGAN TO BENOTICED IN THE FLIGHT DECK AND ONE F/A ALSO NOTICED IT IN THE CABIN AROUND THE SAME TIME. AT THE GATE WITH THE APU RUNNING FOR AT LEAST 10 MIN THE SMELL BRIEFLY TURNED TO A SJan 24, 2025 · N803AW · Airbus A319132SDR YENA2025012100091Pressure Switch · failedFLT#133, BOS-SFO. (ETOPS) 'APU INOP DUE TO UNSUCCESSFUL CSS ( APU SYSTEM A321NEO ETOPS ); REMOVED AND REPLACED APU LOW OIL PSI SWITCH IAW AMM 49-94-84 OPS CHECK GOOD MX-4 UPDATED MDDR CLEAR.'Jan 20, 2025 · N2142J · Airbus A321271NXSDR DALA2025012100512Apu · contaminatedSHIP 3225 DISC: DIRTY SOCK SMELL ON SHORT FINAL. TURNED INTO WET PAINT SMELL AFTER LANDING. C/A: PERFORMED DETAILED INSP OF ENG'S AND APU. FOUND COPIOUS AMOUNTS OF DE-ICING FLUID IN APU INLET AND BIRD CAGE. CLEANED APU INLET AND SURROUNDING AREA (959196). C/W Jan 20, 2025 · N325US · Airbus A320211
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