JASC 4900

Service difficulty reports · 1,840

Reports filed under 4900 · Airborne Auxiliary Power Unit (APU) 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 = '4900'
  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 ASAA2026020163332Apu · odorDMI: 545885. APU INOP DUE TO APU DIRTY SOCK SMELL. ( APU SYSTEM (ETOPS 120 RESTRICTED) ). GROUNDED - YES. REMOVED AND REPLACED APU IAW A330 T/C #330-49-HWI-02 (REF W/O # 389776). OPS / LEAK CHECK GOOD. NO SMELL NOTED FROM APU BLEED. THIS CLEARS MDDR# 545885. MFeb 1, 2026 · N5879K · Airbus A330343SDR YENA2026020200110Apu · contaminatedFLT 813, HPN- PBI. AFTER PARKING AT THE GATE THE F3 ADVISED ME OF A VINEGAR SCENT ON FINAL APPROACH. NO MEDICAL ATTENTION REQUIRED, DEICED IN HPN. ADVISED THE SCENT WAS DIFFERENT, THIS WAS ONLY EXPERIENCED BY F3 & F4. REF INFO NOTICE 2017-T015M, FOUND SOURFeb 1, 2026 · N807JB · Airbus A320232SDR YENA2026020200112Apu · contaminatedFLT 461, LGA - PBI,. INFLIGHT CREW MEMBER REPORTS SMELLING FUMES UPON BOARDING ACFT. ACCOMPLISHED INFO NOTICE 2017-TO15M. ACCOMPLISHED TSM 05-50-00-810-831-A.VERIFIED NO 30 DAY HISTORY. FOUND APU TO BE CAUSE OF ODOR, TYPE1, APU.ACCOMPLISHED DECONTAMINATIN Jan 31, 2026 · N643JB · Airbus A320232SDR ABXA2026020230045Switch · out of positionDURING TAXI OUT, UPON START ATTEMPT FOR LH / #1 ENG LH ENG VALVE DISCREET + LT ILLUM, DUCT PRESSURE RETURNS TO 0 PSI. AIRCRAFT RETURNED TO BLOCKS (BTB). PUT THE APU BLEED AIR SWITCH TO THE OFF POSITION PER ABX 767 MPM 36-11-04. OPS CHECKED GOOD IAW 71-00-00Jan 30, 2026 · N650GT · Boeing 767231SDR CALA2026012613257Apu · odorSTRONG ODOR OF FUEL ON TAXI TO FL200. ARRIVL BLW130 PAX AND FWD CABIN COMPLAINING SMOKE ODOR REPORT. PERFORMED WALK AROUND BEFORE & AFTER ENG RUN. NO LEAKS FOUND. FIM TASK 21-00 TASK 806 SECTION C. REPLACED TWO HEPA FILTERS IN FWD PIT, RAN ENGS SEPERATLY ODJan 26, 2026 · N27421 · Boeing 737924ERSDR YENA2026012600070Apu · contaminatedFLT 2602, SJU-HPN. FUMES EVENT ON DESCENT PASSING THROUGH 14000 SMELL NGT DIRTY SOCKS BUT RATHER GLUE (RUBBER CEMENT) ODOR DID CAUSE LIGHT HEADEDNESS. ODOR DID NOT DISSPATED UNTIL MAIN DOOR OPENED F4 SMELLED AIRED DIRTY SOCK SMELL MIDDLE OF CABIN. PERFORMED Jan 25, 2026 · N3255J · Airbus BD5001A11SDR GTIA2026012639257Apu · contaminatedFA IS AFT REPORTED A SMELL OF DIRTY CLOTHS DURING TAKE OFF AND THEN GOT SICK. TWO OTHER FA'S GET SICK BEFORE FUME EVENT PROCEDURE WAS APPLYED . TAKE OFF POWER AND CLIMB POWER THROUGH RAIN. -PER TSM 05-50-00-810-831-A, THE CAUSE OF THE ODOR WAS FOUND TO BE COMIJan 24, 2026 · N627NK · Airbus A320232SDR YENA2026012600064Apu · odorFLT 71 JFK -SLC. "AFTER LANDING SHORTLY AFTER STARTING THE APU A STRONG BURNOUT ODOR WAS DETECTED IN THE COCKPIT AND FWD GALLEY APU BLEED WAS TURNED OFF ODOR DISSAPATED. INFLIGHT REPORTED A SLIGHT HAZE IN THE CABIN. NO VISIBLE HAZE IN THE COCKPIT.;PERFORMED FIJan 24, 2026 · N3293J · Airbus BD5001A11SDR ASAA2026011462868Apu · odorDMI 545540 - STRONG SOCK SMELL FROM APU BLEED AIR ( APU BLEED AIR SUPPLY SYSTEM (APU AIR NOT AVAILABLE; WILL NEED GRND AIR CON AND AIR START CART) ). GROUNDED - YES. REMOVED AND REPLACED AUXILIARY POWER UNIT, S/N: P-1400, PER T/C 330-49-HWI-02. OPERATIONAL CHJan 14, 2026 · N381HA · Airbus A330243SDR F3LA202512230338Apu · odorODOR EVENT IN THE DECENT PASSING 8000FT, ODOR ONLY IN-FLIGHT DECK. AIRCRAFT REMOVED FROM SERVICE FOR THIS EVENT. PERFORMED TSM 05-50-000-810-836-A FOUND SOURCE OF FUME TO BE APU. IAW AMM 49-00-00-860-214-A, INSPECTED AND CLEANED AREA NO DEFECTS NOTED. FDec 22, 2025 · N641FR · Airbus A321271NXSDR YENA2025122301249Apu · odorFLT# 1799 0RF-FLL "ODOR EVENT AT AROUND 10,000FT. CREW REPORT SMELL OF DIRTY SOCK AFTER LANDING, SMELL WAS ALL THROUGH THE CABIN.; C/W INFO NOTICE .2017-T015 L. DETERMINED APU IS AT FAULT AND WAS PLACED ON MEL. PERFORMED LEVEL "A" DECONTAMINATION REF AMM 21-00Dec 21, 2025 · N703JB · Airbus A320232SDR YENA2025122301239Apu · odorFLT# 1799 ORF- FLL ODOR EVENT AT AROUND 10, 000FT. CREW REPORT SMELL OF DIRTY SOCK AFTER LANDING, SMELL WAS ALL THROUGH THE CABIN.; C/W INFO NOTICE .2017-T015 L. DETERMINED APU IS AT FAULT AND WAS PLACED ON MEL. PERFORMED LEVEL "A" DECONTAMINATION REF AMM 2Dec 21, 2025 · N703JB · Airbus A320232SDR CALA2025121012017Warning Message · false activationECAM WARNING, APU EMERGENCY SHUTDOWN. THIS MESSAGE IS GENERATED WHEN THE EMER BUTTON AT THE 108VU (EXT PWR PLUG IN) IS PUSHED OR MALFUNCTIONED. T/S ECAM WARNING APU EMERGENCY SHUTDOWN ON GROUND IAW 49-00-00-810-923-A. RESET C/BS, OPS TESTS PASSED.Dec 10, 2025 · N490UA · Airbus A320232SDR CALA2025113011584Apu · contaminatedSMOKE ODOR CONDITIONAL INSP REQUIRED PER AMM 05-51-XX DUE TO AN INCIDENT REPORTED BY THE CREW. SMOKE IN COCKPIT DUE DE-ICING WHILE AT THE GATE. SMOKE IN THE COCKPIT CAUSED BY DEICING FLUID INGESTION INTO APU. PILOTS SHUTDOWN PACKS AND ISO VALVE. RAN PACKS SMOKNov 29, 2025 · N38257 · Boeing 737824SDR AALA202511243928Vent Line · cokedAIRCRAFT WAS GROUNDED: DURING APPROACH WITH ENGINES AT REDUCED OR IDLE POWER, DIRTY SOCK SMELL THROUGHOUT CABIN. LESS NOTICEABLE AT HIGHER POWER SETTINGS. ALSO NOTICED THE SAME SMELL AT THE GATE WHEN OPERATING ON APU BLEED. MAINTENANCE FOUND THE APU AIR / OIL Nov 22, 2025 · N545UW · Airbus A321231SDR SCNA20251120447SApu · odorREPLACED APU REF AMM 49-15-11 FUME EVENT IN CABIN.Nov 19, 2025 · N831SY · Boeing 73783NSDR F3LA202511190325Apu · leakingFUME EVENT INITIALLY WAS SMELLED IN GALLEY, FUME REMOVAL APPLIED AND WENT AWAY RETURNED IN AFT GALLEY. EMERGENCY DECLARED. REF LP518093 ITEM 1 FOR APU DEFERAL REF TSM 05-50-00-810-831-A. PERFORMED APU INSPECTION TYPE 1 EVENT ON LEVEL A IAW AMM 49-00-00-200-8Nov 17, 2025 · N360FR · Airbus A320251NSDR CALA2025111711251Apu · odorHEAVY MUSK STENCH WITH PACS ON. DIFFICULT TO BREATH DUE TO STRONG ODOR. PERFORM CONDITIONAL INSPECTION AMM 05-51-58-800-801-C3. RAN BOTH PACKS AND OPENED & INSPECTED BOTH PACK COMPARTMENTS WITH NO DISCREPANCIES. OPENED & INSPECTED ELECTRONICS BAY WITH NONov 14, 2025 · N799UA · Boeing 777222SDR DALA2025112008488Apu · odorATB/FUME - RETURNED TO JFK DUE TO ODOR IN CABIN. P-TRAK SNIFFER RESULTS INDICATE APU AS SOURCE OF THE ODOR. COMPLETED LEVEL B ECS DECONTAMINATION. DEFERRED APU PER MEL 49-10-01A. LATER, COMPLIED WITH CLEAN APU AIR INTAKE AND COMPARTMENT PER WORK CAR 4916-200Nov 12, 2025 · N536DN · Airbus A321271NXSDR AALA202511117382Vent Line · cokedAIRCRAFT WAS GROUNDED: FUME SMELL FORWARD AND AFT CABIN ABOUT 40 MINUTES INTO FLIGHT ON DESCENT. MAINTENANCE REPLACED THE APU GEARBOX VENT LINE DUE TO EVIDENCE OF COKING ((AALA202511117382) AND REPLACED THE APU GEARBOX AIR OIL SEPARATOR (AALA202511117922) PER Nov 9, 2025 · N998AN · Airbus A321231SDR AALA202511076415Apu · leakingAIRCRAFT WAS GROUNDED: WHEN POWER LEVERS WERE AT IDLE FOR A FEW MOMENTS ON ARRIVAL APPROXIMATELY 5 MINS FROM LANDING A PUNGENT DIRTY SOCK SMELL IN THECOCKPIT MUCH MORE THAN USUAL. LINGERED FOR A WHILE. APU WAS OFF.F/A'S DID NOT SMELL THE ODOR IN THE CABIN. MAINov 4, 2025 · N715UW · Airbus A319112SDR IPXA2025120897297Strap · corrodedAPU INLET DUCT HAS EVIDENCE OF CORROSION AROUND NUT PLATES. REMOVED AND REPLACED SUPPORT ANGLES AND STRAP IAW DWGS 148N3152, 148N3141, 148N3138, AND 148N3105 IAW SRM 51 GUIDELINES, IAW GMM REV 12 SECTION 09-08.Oct 28, 2025 · N414UP · Boeing 75724APFSDR AALA202511077622Apu · contaminatedAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANTS REPORT DIRTY FEET SMELL ON DECENT. A FAINT ODOR WAS NOTED IN THE FLIGHT DECK. MAINTENANCE ACCOMPLISHED SMOKE / ODOR / FUME APU TROUBLESHOOTING TASK CARD 26L00021002 AND ACCOMPLISHED A DECONTAMINATION OF THE ENVIRONMEOct 28, 2025 · N102UW · Airbus A320214SDR WX0A2025102732612Apu · odor(AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL OCCURS ON APPROACH INTO SBN / PERFORMED PHASE 3 TASK CARD W.O. 21-000-003 NO ODOR DETECTED, THIS CLEARS MEL 21-52-01E MDDR #221523 M PROCEDURE REVERSED PLACARDS REMOVED. REMOVED APU IAW AMM 49-11-11-000-004-A. INSTALLEDOct 26, 2025 · N305NV · Airbus A319112SDR YENA2025102801060Apu · odorFLT#1233, MCO-SJU. "DURING CLIMB AND CRUISE INFLIGHT CREW REPORTED STRONG ODOR/SMELL OF STINKY CHEESE/DIRTY SOCKS . REPORT FROM FWD GALLEY TO ROW 4. MODERATE INTENSITY LEVEL2. FOM POLICY COMPLIED WITH AND CALLS TO DISPATCH AND MX. IRRITATING NOSE SMELLS; ACCOMOct 24, 2025 · N571JB · Airbus A320232SDR DALA2025101607572Apu · odorMUSTY ODOR ON FLIGHT DECK AS WE DESCENDED TO 4000' MIL. SEEMED TO GO AWAY BUT RETURNED AFTER LANDING. REPLACED APU. (LP 7781910, 1252891)Oct 16, 2025 · N381DZ · Airbus A321211SDR AALA202510177243Cooling Fan · odorAIRCRAFT WAS GROUNDED: DURING DECENT DETECTED A FAINT PLASTIC SMELL IN THE ENTIRE AIRCRAFT. ODOR DISPUTED, THEN INCREASED, AND DISSIPATED. CONFIRMEDBY ALL FOUR FLIGHT ATTENDANTS. APU COOLING FAN REPLACED IAW AMM49-52-51,Oct 9, 2025 · N587UW · Airbus A321231SDR IPXA2025092946537Apu · odorWITH APU ON - TURNING ON FIRST PACK WE ARE HAVING HEAVY OIL SMELL FUMES IN COCKPIT. TS PERFORMED FOR OIL SMELL FUMES IN THE COCKPIT IAW FIM 21-00-21/201 REV 146. OIL SMELL FUMES NOT OBSERVED. AIR CONDITIONING SYSTEM OPERATIONAL TEST PERFORMED WITH APU BLEED IASep 25, 2025 · N363UP · Boeing 767346SDR I5PA2025092848804Apu · faultyAPU PNEUMATICS INOP. PERFORMED AU ECU BITE PER FIM 49-22 FT 866. P2 SENSOR HARD FAULT. R/R P2 SENSOR PER AMM, NO HELP. PERFORMED WIRING CHECK OF APU SYST. PER WDM NO DEFECTS FOUND. R/R APU PER TASK CARD. OPS CHECK NORMAL.Sep 24, 2025 · N688SL · Boeing 757230SDR CALA2025092409222Apu · faultedAPU FAULT LIGHT ON AFTER LANDED AT PTKK. RAN THE QRH. AFTER RES ET APU FAULT LIGHT ON AGAIN. PERFORMED APU BITE TEST - NO FAULTS. AMM 49-60 TASK 801. FAULT HISTORY SHOWS MX MESSAGE# 49-41012. ACCOMPLISHED FIM 49-40 TASK 803. APU STARTED AS REQUIRED.Sep 21, 2025 · N39297 · Boeing 737824SDR AALA202509225350Apu · contaminatedAIRCRAFT WAS GROUNDED: IN DESCENT WITH POWER AT IDLE SLIGHT MUSTY SMELL FROM PACKS. MAINTENANCE FOUND A RESIDUAL HYDRAULIC FLUID STREAK FRM THE RIGHT-HAND MAIN LANDING GEAR WHEEL WELL TO THE APU INLET. A LEAK CHECK OF THE HYDRAULIC SYSTEM RESULTED IN NO LEAKS Sep 19, 2025 · N551UW · Airbus A321231SDR CALA2025091909050Apu · odorACFT SMELLS OF VAPOR & BURNING OIL WITH APU & ENG BLEED. REPLACED RECIRCULATION FILTERS IAW 21-25-02/401. RAN APU AND BOTH ENGINES ONE AT A TIME. THE ODOR WAS ONLY NOTICEABLE WHEN USING THE APU BLEED. ENINE RUNS WERE NORMAL. SUGGEST PLACING APU BLEED ON Sep 18, 2025 · N57862 · Boeing 75733NSDR DALA2025102007629Apu · failedFIRE/ATB - APU IN OPERATION DURING FLIGHT DUE TO ATA 24 MEL APPLIED FOR EPC 3 DEGRADED FAULT. DURING CLIMB, SHUDDER FELT IN BACK OF A/C WITH APU FAULT FOLLOWED BY FIRE INDICATION. APU FIRE HANDLE PULLED, BOTTLE DISCHARGED. RETURNED TO MCI. CORRECTIVE ACTION: MSep 16, 2025 · N112DU · Airbus BD5001A10SDR CALA2025082908273Apu · odorFOUL ODOR OF FUMES/OIL COMING FROM PACKS WHILE ON BOTH ENG & APU BLEED. ACCOMPLISHED LEVEL A DECONTAMINATION OF ECS WITH APU BLEED IAW AMM 21-00-00-615-802-A. ODOR OF OIL/FUMES PERSISTS. ACCOMPLISHED DECONTAMINATION OF ECS WITH ENGINES 1 & 2. SMELL FADED WITAug 26, 2025 · N841UA · Airbus A319131SDR YENA2025082800891Apu · odorFLT#2101, JFK-CHS. "WHILE CRUISING AT FL 340 FLIGHT CREW EXPERIENCED AN ODOR SIMILAR TO A MAGIC MARKER IN THE COCKPIT THAT DEVELOPED INTO BURNING EYES AND THROAT. FA#1 INFORMED THE CA PAX WERE FEELING SICK WITH BURNING THROAT AND ONE VOMITING,. PHYSICAL SYMPTOAug 26, 2025 · N658JB · Airbus A320232SDR YENA2025082800894Control Valve · failedFLT#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 DALA2025082606332Inlet · contaminatedDISC: ON DESCENT THRU 8000' FLEW THRU CLOUD AND STARTED SMELLING DIRTY SOCK ODER. SMELL REMAINED UNTILL ARIVING AT GATE. FOUND APU ILET CONTAMINATED WITH HYD CLEANED INLET + PLENUM, R/ INST. APU BLEED NO CONTAMINATION, CLEANED WHEEL WELL OF HYD FLUID, CHECK TAug 25, 2025 · N336NW · Airbus A320212SDR YENA2025082100860Apu · leakingFLT 524, LAX-JFK. STRONG FUMES ODOR ON ARRIVAL, AROUND 14,000 FT ALTITUDE, WHEN WE ENTERED THE CLOUDS. IT WENT AWAY BEFORE WE COULD DO A ISOLATION PROCEDURE. ODOR WAS IN THE BACK HALF OF MAIN CABIN, APU WAS FOUND LEAKING. ECS LEVEL C DECONTAMINATION. REPLAug 20, 2025 · N967JT · Airbus A321231SDR DALA2025082106249Apu · odorAT GATE ON APU, STRANGE NOISE + BURNING SMELL, RIGHT PACK OVHT, R PACK FAIL, + PACK FAULT R BYPASS VLV INOP SMELL DISSIPATED AFTER R PACK SHUTOFF. FOUND RT ACM HOUSING CRACKED AND FAN BLADE MISSING. REMOVED ACM PER A220 AMP 21-51-03, REMOVED HEAT EXCHANGER PERAug 19, 2025 · N108DQ · Airbus BD5001A10SDR DALA2025081306064Apu · odorDIRTY SOCK ODOR WHEN APU BLEED SELECTED ON. R/R APU PER W/C 4900-9002.Aug 7, 2025 · N342NB · Airbus A319114SDR YENA2025080800819Apu · odorFLT#219, BOS-SAN. DURING DESCENT STRONG OZONE SMELL/ODOR ON BLEED PAGE HP VALVE WAS OPEN. SHUT X-BLEED & PACK 1 OFF. ODOR DISSIPATED W/IN 20 SECONDS . AFTER LANDING RESET X-BLEED & PACK 1 AND ODOR RETURNED IMMIDIATELY. ODOR FORM COMPLETED; REF TSM 05-50-00-81Aug 7, 2025 · N989JT · Airbus A321231SDR DALA2025080805954Apu · odorDIRTY SOCK SMELL WHEN APU AIR TURNED ON. R/R APU IAW A319 AMM 49-11-11.Aug 7, 2025 · N342NB · Airbus A319114SDR DALA2025081105987Apu · odorSHIP 9500 DIRTY SOCKS SMELL WITH APU AIR ON WHEN TAKING OVER THE AIRPLANE. CORECTIVE ACTION: R/R APU REF B717 AMM 49-10 (7813574)Aug 6, 2025 · N949AT · Boeing 717200SDR SWIA202508130005Apu · odorFA€™S SMELLED STRONG PLASTIC BURNING SMELL. PAX SMELLED TOO. (FLIGHT 5577 - FILED CLOSED) THIS DISCREPANCY WAS TRANSFERRED TO CAMP ITEM 30613473 WITH THE FOLLOWING CORRECTIVE ACTION: "REF CP CP 30619772 FOR WORK PERFORMED. PERFORMED ENGINE RUNS TO TA POWER, Aug 5, 2025 · N142SY · Emb ERJ170200LRSDR CALA2025080607375Warning Message · false activationCLASSII APU MSG CLEARED WHEN APU MASTER SWITCH ON. FOUND MSG, FUEL LOW PRESS LOW FUEL PRESS SW (5030QM) ON LAST LEG REP. DUE TO HISTORY REQUEST MEL 4900A OK TO MEL COMPLIED WITH MEL 4900A DM MX NOTE FIN 5030QM IS SENSOR P/N FRH100014A (18-2822-3-0017). PERFAug 3, 2025 · N889UA · Airbus A319132SDR HALA20250730237Battery · faultedETOPS - APU BATT SYST FAULT. REMOVED AND REPLACED APU BATTERY PER AMM 24-38-52 AND TSM 24-30-00 NO FAULTS NOTED. OK FOR SERVICE.Jul 29, 2025 · N4649K · Airbus A330343SDR JJBA20251111051Exhaust Cone · dentedAPU EXHAUST CONE DENTED IN MULTIPLE LOCATIONS. APU TAIL CONE FOUND TO HAVE NUMEROUS DENTS. INSTALLED NEW TAIL CONE ASSEMBLY.Jul 25, 2025 · N12135 · Emb EMB145XRSDR YENA2025072800780Apu · odorFLT#1700, LAX-FFL. "FLIGHT ATTENDANTS NOTICED AN ODOR IN THE AFT OF THE AIRCRAFT; COMPLIED WITH INFO NOTICE 2017-7015,SECTION B2 ID ODOR AS TYPE 1 ,APU WILL BE DEFERRED FOR FURTHER EVALUATION,DECON LEVEL "B" WAS ACCOMPLISHED PER TSM 05-50-00-810-831-A ACFT OJul 25, 2025 · N982JB · Airbus A321231SDR YENA2025072500768Apu · odorFLT#66, ABQ-JFK. "FUMES EVENT DURING APPROACH AND AT SHUT DOWN. ( APU SYSTEM )" (SUPPLEMENTAL INFORMATION TO FOLLOW)Jul 25, 2025 · N547JB · Airbus A320232SDR DALA2025072405550Apu · odorDURING PREFLIGHT - DIRTY SOCK SMELL WHEN APU BLEED SELECTED AFTER 3+ MINUTE APU WARM UP. REF LOG 1099944 FOR T/S INFO AND APU CHANGE INFO. APU NIS FWD TO MEL 49-10-01A, PLACARDS INSTALLED NO "M" PROCEDURES. (LP: 7278048)Jul 23, 2025 · N367NW · Airbus A320212
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