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 AALA202507230410Apu · odorAIRCRAFT WAS GROUNDED, APU DETERMINED TO BE SOURCE OF ODOR. PLACED ON MEL. (OPEN)Jul 23, 2025 · N751UW · Airbus A319112SDR YENA2025072300747Apu · odorFLT#608, LAS-FLL. DIRTY SOCK SMELL ALL PHASES OF FLIGHT. SMELL DISSIPATED WHEN PACK 1 WAS TURNED OFF; COMPLIED WITH INFORMATION NOTICE 2017-T015, SECTION B2. IDENTIFIED ODOR SOURCE AS APU, DECONTAMINATION LEVEL B WAS ACCOMPLISHED PER TSM 05-50-00-810-831-A. OJul 22, 2025 · N967JT · Airbus A321231SDR SWAA2025071690761Apu · trippedJUST PRIOR TO BRAKE RELEASE; APU TRIPPED OFFLINE AND GOT A STRONG ACIDIC SMELL IN THE FLT DECK AND THROUGHOUT THE ENTIRE AIRCRAFT. OK TO CONTINUE 49-11-01 SP 1 AND SP 2. P6-4 APU CONT COLLARD P6-5 INLET DOOR COLLARD. APU OPS CHECKS OK. NO HISTORY. RAN APU Jul 12, 2025 · N8813Q · Boeing 7378SDR UIEA2025070500834Exhaust Duct · disconnectedFIRE APU WARNING ON TAXI IN RAN NON-NORMAL CHECKLIST. DEACTIVATED THE APU AND REMOVED THE APU EXHAUST DUCT IAW EA-4849A025 PART 1 & AMM 49-11-01. INSPECTIONS COMPLETED NO FURTHER FINDINGS. REMOVED AND REPLACED THE DAMAGED APU AND APU EXHAUST DUCT CLAMP AND REJul 5, 2025 · N863GT · Boeing 7478FSDR DALA2025070805072Cooling Fan · leakingSHIP 3273 DISC: DURING PREFLIGHT, STARTED APU AND TURNED ON APU BLEED. NOTICEABLE DIRTY SOCK SMELL ON A/C. C/A: FOUND & REPLACED LEAKING APU COOLING FAN ON LOG#1063584. (LP: 7023078)Jul 5, 2025 · N373NW · Airbus A320212SDR YENA2025063000663Apu · odorFLT#1075, MCO-PVD. "DURING DESCENT PILOTS AND FA'S EXPERIENCED A FUME EVENT. PILOTS NOTICED AN OIL SMELL AND FWD FA'S NOTICED BURNING RUBBER. A/C HAS FUME HISTORY. ( PACKS ); REF LP#4197860 ITEM #2, APU ODOR IDETIFIED & CORRECTED. NO SMELL PRESENT AFTER DECON/Jun 28, 2025 · N547JB · Airbus A320232SDR WX0A2025062732475Apu · odor(AIRCRAFT GROUNDED) DIRTY SOX SMELL ON FINAL DESCENT. COCKPIT / CABIN / PERFORMED TROUBLESHOOTING OF THE ODOR EVENT PER LEVEL 1 TASK CARD A32X- 21-000-001. THE SMELL WAS REPRODUCED ON BOTH PACKS WITH THE APU RUNNING AND ENG 2 RUNNING. AIRCRAFT NEEDS TO BE FEJun 26, 2025 · N191NV · Airbus A320214SDR AALA202507094247Apu · leakingAIRCRAFT WAS GROUNDED: THE ACFT DIVERTED TO MCO DUE TO THE FLT CREW REPORTING THAT DURING PUSH BACK FLT ATTENDANT REPORTED ODD SMELL IN AFT CABIN, BUT FELT OK. ALL OTHER FLT ATTENDANTS WERE OK AS WELL. NO UNUSUAL SMELL IN THE FLT DECK. DURING CLIMB OUT ABOVEJun 24, 2025 · N169UW · Airbus A321211SDR DALA2025062504773Cooling Fan · contaminatedSHIP 3251, DIRTY SOCK ODOR IN FLIGHT DECK. FOUND APU COOLING FAN WET WITH OIL. T/S PER A320 TSM 49 -00. NO EXTERNAL LEAKS. VERIFIED APU COOLING FAN NOT LEAKING. APU INTAKE PLENUM DIRTY, SUSPECT INTERNAL LEAK. C/W AMDS W/C 4916-2001 AND R/REINSTALL APU ACCESSJun 24, 2025 · N351NW · Airbus A320212SDR YENA2025062300641Apu · smokeFLT#123, JFK-LAX. "AIR PACK 2 OVHT AFTER STARTING APU. SMOKE REPORTED IN CABIN; COMPLIED WITH INFO NOTICE 2017-T015, SECTION B2. IDENTIFIED ODOR AS TYPE 6 LEVEL B, ACM GRINDING AND MAKING ODOR. LOCKED OUT #2 PACK REF LG PG 4273641, ITEM 2. DECONTAMINATION LEVEJun 19, 2025 · N944JT · Airbus A321231SDR WX0A2025062032467Apu · leaking(AIRCRAFT NOT GROUNDED) DIRTY SOCK ODOR REPORTED FROM BOTH FWD FA'S AS SOON AS DOOR OPENED. FOUND LUBE MODULE FILTER LEAKING, APU COOLING FAN LEAKING. SAW POSSIBLE LEAK OF FCU BEFORE APU RUN, BAGGED FCU & RAN, FOUND NO VISUAL LEAK. CONFIRMED LEAKS AFTER RUN. DJun 17, 2025 · N210NV · Airbus A320214SDR CALA2025061905713Actuator · faultedFOUND APU INLET ACTUATOR OPERATING INTERMITTANT WITH NO HARD FAULTS. INSPECTED AREA AND FOUND BURNT WIRE OR OVERHEAT SMELL COMING FROM ACTUATOR. REMOVED APU AIR INLET DOOR ACTUATO. REF: AMM 49-15-31-000-801. ACTUATOR P/N OFF: 734-07530-03. S/ N 2057 STARTED TOJun 17, 2025 · N37351 · Boeing 7378SDR YENA2025061100588Apu · faultedDURING HEAVY MAINTENANCE: APU GROUND SERVICE MODE TESTS; REFERENCES: REF/1/ APU GROUND MODE TESTS, REF/2/ SERVICE PANEL WIRING CHECKS, REF/3/ EMAIL CORRESPONDENCE. DESCRIPTION: THIS EC GIVES AUTHORIZATION AND INSTRUCTION TO PERFORM TROUBLESHOOTING STEPS PER REJun 6, 2025 · N3113J · Airbus BD5001A11SDR NACA2025060300001Hour Meter · inoperativeAPU HOUR METER INOP. REMOVED AND REPLACED THE POSITIVE TERMINAL OPS CHECK NORMAL IAW AMM 49-12-01Jun 3, 2025 · N567NC · Boeing 76733ASDR NACA2025052800001Meter · stuckAPU HOURMETER STUCK AT 4644 HRS. REMOVED AND REPLACED APU HOURMETER IAW AMM 49-72-01 OPS CHECK NORMAL.May 28, 2025 · N567NC · Boeing 76733ASDR ABXA20250528108Apu · faultedON TAXI OUT, NO DUCT PRESSURE FROM APU. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED SYSTEM IAW MEL C ABX-49-11-1-1. RETURNED AIRCRAFT TO SERVICE.May 28, 2025 · N760CK · Boeing 767341SDR NACA2025052700001Actuator · failedAPU FAULT AFTER LANDING IN KMIA, APU RPM NEVER GOT HIGHER THAN 35%. ACCOMPLISHED FIM 41-11 FT 958, FOUND IGV ACTUATOR FAULT. REMOVED AND REPLACED IGV ACTUATOR PER B767 AMM 49-52-02 OPS AND LEAK CHECK GOOD.May 27, 2025 · N566NC · Boeing 7673BGSDR AALA202505282816Apu · contaminatedAIRCRAFT WAS GROUNDED: FLIGTH CREW REPORTEDS AN OILY AND OR MUSTY SMELL IN THE FLIGHT DECK ONLY THAT STARTED AT FL220 AND CONTINUED UNTIL APPROXIMATELY 8000 FEET. MAINTENANCE ACCOMPLISHED INITIAL SMOKE ODOR FUME TROUBLESHOOTING TASK CARD 26L00021001, THE AMay 23, 2025 · N563UW · Airbus A321231SDR F3LA202505250242Apu · odorODOR EVENT IN COCKPIT MOMENTARY ODOR IN DESCENT BELOW 10,000 BUT DISIPATED QUICKLY. CAME BACK STRONG AT GATE WHEN APU BLEED TURNED ON. FA'S ALSO NOTED ODOR AROUND ROW 27 W/APU BLEED ON.May 23, 2025 · N712FR · Airbus A321211SDR NACA2025051500003Apu · faultedAPU FAULT 2 ATTEMPTS KMIA. THIRD ATTEMPT FAILED, FOLLOWED FIM 49-11 FAULT TREE 989 REPLACED APU STARTER NO HELP. DEFERRED APU IAW MEL 49-11-01A CAT C ON 5/15/2025 @ 1850ZMay 15, 2025 · N566NC · Boeing 7673BGSDR AALA202505165926Vent Line · cloggedAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORTED STRONG DIRTY SOCK SMELL IN THE MID CABIN ON APPROACH THRU LANDING. MAINTENANCE FOUND THE APU WAS OVERSERVICED AND DRAINED THE EXCESS OIL PER AMM 49-91-42. (AALA202505164104) MAINTENANCE ALSO FOUND THE APU GEARBOMay 15, 2025 · N552UW · Airbus A321231SDR YENA2025051400494Apu · odorFLT#1098, MCO-LGA. 'OILY - CHEMICAL SMELL OBSERVED STARTING AT TOP OF DESCENT; C/W INFO NOTICE 2017-T015L. PERFORMED T/S IAW TSM 05-50-00-810-831-A. DETERMINED TO BE A TYPE 1 (APU). REF. TO LP 4238107, ITEM 2 FOR FINDINGS. APU REMAINS ON MEL. NO FURTHER DEFECMay 13, 2025 · N665JB · Airbus A320232SDR AALA202505121019Apu · odorAIRCRAFT WAS GROUNDED: STRONG DIRTY-SOCK ODOR AT CLIMB POWER SETTINGS. NOT NOTICEABLE AT TAXI OR CRUISE SETTINGS. ACCOMPLISHED JOB CARD 26L00021001.VERIFIED APU AS SOURCE OF ODOR, APU PLACE ON MEL. **SUPPLEMENTAL REPORT WILL BE SUBMITTED.** (OPEN)May 9, 2025 · N9015D · Airbus A319115SDR HALA20250428115Apu · shutdownETOPS - APU: AUTO SHUT DOWN. REMOVED STARTER AND CLUTCH AND INSTALLED STARTER AND CLUTCH PER AMM 49-42-51 AND 49-42-52. FUCTIONAL CHECK GOOD. REPLACED APU FUSE PER AMM 49-42-00-960-003-A OPS CHECK GOOD. A/C OK FOR SVCApr 25, 2025 · N205HA · Airbus A321271NSDR WX0A2025041832389Intake · contaminated(AIRCRAFT GROUNDED) DURING DECENT THROUGH 15,000 FEET, DIRTY SOCK ODOR BECAME APPARENT IN THE FLIGHT DECK. FA/S IN FWD AND AFT ALSO SMELLED TH EODOR. PERFORMED ELIMINATION OF ODOR/FUMES IN FLIGHT DECK/CABIN QRH PROCEDURE. WITH PACK 1 OFF, ODOR DISSIPATED BUApr 17, 2025 · N254NV · Airbus A320214SDR YENA2025041600407Apu · odorFLT#453, BOS-PLS. 'STRONG LEVEL 1 ODOR IN COCKPIT FROM TAKE-OFF AT 6000 FT ( APU SYSTEM ).' (SUPPLEMENTAL INFORMATION TO FOLLOW)Apr 13, 2025 · N955JB · Airbus A321231SDR DXTA2025042203076Apu · odorFOLLOWING APU START, DETECTED FAINT ODOR OF ATOMIZED OIL IN COCKPIT AND CABIN. ODOR REMAINED DETECTABLE THROUGHOUT FLIGHT WITH APU OFF. AFTER LANDING, WITH APU OPERATING AND ENGINES SHUT DOWN, ODOR REMAINED DETECTABLE. ONCE APU BLEED WAS SELECTED OFF, ODOR Apr 12, 2025 · N828QS · Textrn TEXTRON700SDR AALA202504085272Apu · odorAIRCRAFT WAS GROUNDED: NEAR THE END OF THE START CYCLE FOR ENGINE NUMBER 1, A HEAVY FUME SMELL WAS EXPERIENCED BY THE PILOTS AND ALL FLIGHT ATTENDANTS. WE ABORTED THE ENGINE START AND THE SMELL DISSIPATED. DETERMINED SOURCE OF ODOR TO BE THE APU WHEN THE BLEEDApr 7, 2025 · N938NN · Boeing 737823SDR DXTA2025040602974Apu · odorCABIN ODOR: UPON ENTERING AIRCRAFT WITH APU OFF, THERE IS A STRONG ODOR WHICH SMELLS JUST LIKE DIRTY COALESCER SOCKS. WITH APU RUNNING AND ALSO DURING CRUISE FLIGHT, THE BAD ODOR IS BLOWING OUT OF THE WEMAC VENTS. BAD ODOR IS IN COCKPIT AND CABIN. CORRECTIVE AApr 6, 2025 · N829QS · Textrn TEXTRON700SDR UIEA2025040300429Apu · inoperativeAPU INOP (AUXILIARY POWER UNIT) ER OPERATIONS NOT ALLOWED (NOTIFY DISPATCH) R60).(<P>APU INOP (AUXILIARY POWER UNIT) ER OPERATIONS NOT ALLOWED (NOTIFY DISPATCH) R60) WAS REPLACED WITH TASK CARD 8027 A-49-999-00-01. NO FURTHER DEFECTS NOTED.</P>)Apr 5, 2025 · N1381A · Boeing 767316SDR YENA2025040900378Apu · contaminatedFLT#284, HPN-MCO. 'INFLIGHT REPORTS SMELL OF SMOKE DURING INITIAL DESCENT FRONT AND BACK CABIN; REF WO#1403084 APU COMPRESSOR CLEANING APU CLEANING AND PACK, APU DECONTAMINATION ASSIGNED, AND WO 1403490 LEFT ENGINE WASH. NO ODOR PRESENT AT END. REF ;P 4290066,Apr 4, 2025 · N629JB · Airbus A320232SDR I5PA2025031275701Pressure Sensor · faultedFLT NO: MGE 401. ESI - APU SHUTDOWN 2X WHILE ENG STARTING. PERFORMED ECU BITE CHECK FOUND REVERSE FLOW MSG. R/R PRESSURE SENSOR PER AMM 49-61-04. OPS CHECK GOOD.Mar 12, 2025 · N757QM · Boeing 75729JSDR NACA2025031000001Vane · failedAPU FAULT. ATTEMPTED 3 STARTS NEVER GOT ABOVE 45%. REMOVED AND REPLACED ACTUATOR INLET GUIDE VANE OPS CK OK IAW AMM 49-51-02Mar 10, 2025 · N566NC · Boeing 7673BGSDR YENA2025031200250Apu · odorFLT#2637, JFK-STI. CLIMBING OUT AFT PA REPORTED AN OILY SMELL THAT STARTED ON T/O RAN ODOR CHECKLIST. ISOLATION UNSUCCESSFUL. JUMPSEAT CA WENT TO INVESTIGATE AND SMELLED AND INTERMITTENT KEPT OILY SMELL IN THE AFT GALLEY; C/W INFO NOTICE 2017 T055K PER DECISIMar 7, 2025 · N2044J · Airbus A321271NSDR YENA2025031200249Apu · odorFLT#498, SEA-BOS. ' LEVEL 2 FUME EVENT NOTICED BY MULTIPLE CREW MEMBERS IN THE CABIN. DESCRIBED AS SWEET MAGIC MARKER SMELL ELIMINATING FROM A/C VENTS. COMPLIED W/ ODOR ISOL PROCEDURE. EVENT CAUSED EYE IRRITATION; C/W INFORMATION NOTICE 2017-T015, SECTION B2. Mar 6, 2025 · N979JT · Airbus A321231SDR CALA2025031002646Control Valve · faultedCOCKPIT AND CABIN FILLED UP WITH THICK WHITE SMOKE. CFR AND POLI CE CALLED. AT THE GATE.PERFORMED AN APU START UP AND NOTICED SMOKE IN THE COCKPIT AND THE CABIN AFTER 10 SECONDS OF STARTING UP WITH THE BLEED AIR ON. APU OIL IS READING ZERO. ALSO NOTICED SIGNS Mar 6, 2025 · N48127 · Boeing 757224SDR DALA2025030501726Apu · odorSHIP 3058 APU BLEED HAD A BURNING RUBBER SMELL AS WE TURNED IT ON AT THE GATE, CREW TURNED IT OFF. CORRECTIVE ACTION: REFER TO MD LOG #0839531 FOR CORRECTIVE ACTION.(6896442)Mar 4, 2025 · N358DN · Airbus A321213SDR SWAA2025030400729Apu · smokeAFTER APU SHUTDOWN; SMOKE OBSERVED COMING OUT APU AHM HAS SHOWN 'LOW OIL QTY.' SINCE THERE WAS SMOKE FROM THE TAIL PIPE AND THE LOW OIL QTY SUGGEST LOOKING DOWN THE EXHAUST FOR AN OIL LEAK. WAITING FOR PLANT ENGINEERING FOR FINAL WORD BUT MORE THAN LIKELY AN AFeb 28, 2025 · N7727A · Boeing 73776NSDR GTIA2025022438763Apu · odorDURING CLIMB OUT OF BWI, WE BRIEFLY EXPERIENCE A WET SOCK ODOR, BUT WENT AWAY. DESCENDING INTO MCO THE STRONG ODOR RETURN (MODERATE INTENSITY) WE TRY TO ISOLATE PACK #1 FOR FEW MINUTES, THEN PACK #2 AS PER QRH. BUT WE COULDNT ISOLATE THE ODOR. THE INTESITY SLIFeb 24, 2025 · N618NK · Airbus A320232SDR DALA2025022401440Control Valve · faultedSHIP 5034 "NO GO" ODI PREVENTION - DRIVER DO NOT DISPATCH THE AIRCRAFT" - W/O MCC APPROVAL" - FUEL SMELL ON APU START. PERFOMED A VISUAL INSPECTION OF APU COMPARTMENT AND INTAKE WITH NTF. REF A321 AMM 49-00. REMOVED AND RE-INSTALLED APU LOAD CONTROL VALVE REFeb 22, 2025 · N534DT · Airbus A321271NXSDR I5PA2025021068802Sensor · faultyFLT NO: N/A (MX INSP). ESI - APU BLEED INOP. R/R THE INLET PRESSURE SENSOR (P2) PER AMM 49-61-04. OPS CHECK GOOD.Feb 10, 2025 · N688SL · Boeing 757230SDR AALA202502068925Cooling Fan · leakingAIRCRAFT WAS GROUNDED: ON DESCENT THROUGH 12000 AN ACRID SMELL IN THE FLIGHT DECK. THEN AT 2000 FEET BEFORE ENTERING THE CLOUD DECK THERE WAS A MUSTY SMELL IN THE FLIGHT DECK. MAINTENANCE FOUND THE APU COOLER VENT LINE AND THE APU GEARBOX VENT ORFICE CLOGGED Feb 4, 2025 · N4005X · Airbus A319115SDR AALA202502066739Vent Line · cloggedAIRCRAFT WAS GROUNDED: ON DESCENT THROUGH 12000 AN ACRID SMELL IN THE FLIGHT DECK. THEN AT 2000 FEET BEFORE ENTERING THE CLOUD DECK THERE WAS A MUSTY SMELL IN THE FLIGHT DECK. MAINTENANCE FOUND THE APU COOLER VENT LINE AND THE APU GEARBOX VENT ORFICE CLOGGED Feb 4, 2025 · N4005X · Airbus A319115SDR AALA202502068410Orifice · cloggedAIRCRAFT WAS GROUNDED: ON DESCENT THROUGH 12000 AN ACRID SMELL IN THE FLIGHT DECK. THEN AT 2000 FEET BEFORE ENTERING THE CLOUD DECK THERE WAS A MUSTY SMELL IN THE FLIGHT DECK. MAINTENANCE FOUND THE APU COOLER VENT LINE AND THE APU GEARBOX VENT ORFICE CLOGGED Feb 4, 2025 · N4005X · Airbus A319115SDR CALA2025020502208Apu · faultedFLIGHT ATTENDANTS CLAIM THEY SMELLED AN ELETRIC SMELL LANDING RE PEAT WU SMOKE AND ODOR QUESTIONAIRE ATTACHED INVESTIGATED CABIN, TURNED ON EVERYTHING ELECTRICAL INSIDE AND DID FULL SWEEP OF CABIN, NO ODOR DETECTED. STARTED APU AND OPERATED 1 PACK AT A TIME, OFeb 3, 2025 · N212UA · Boeing 777222SDR CALA2025020302188Apu · contaminatedSMOKE AND FUMES BEGAN ENTERING CABIN FROM WE SUSPECT DEICERS HIT APU INLET ACP CONDITIONAL INSP FOR SMOKE AND ODER IN CABIN REF AMM 05-51-26. SMALL AMOUNT OF ODOR FELT BY CREW. ACP PACK BURN OUT REF AMM21-00-21. NO ODOR OR FUMES NOTTED.Feb 3, 2025 · N37253 · Boeing 737824SDR ABXA20250131030Warning Message · false activationDURING TAXI CREW REPORTED ,APU DOOR STATUS MESSAGE APPEARED AFTER TAXI A/C RETURNED TO GATE (BTB) AND MTX GROUNDED A/C. MTX PERFORMED TROUBLESHOT IAW FIM 49-11 FAULT TREE 988. NO DEFECTS NOTED. OPS CHECK GOOD.MTX REURED A/C TO SERVICE .Jan 31, 2025 · N760CK · Boeing 767341SDR YENA2025012800113Apu · odorFLT#1817, JFK-POS. 'AROUND 14K FEET A STRONG ODOR WAS SMELLED THROUGHOUT THE WHOLE AIRCRAFT. STARTED OUT STRONG AND SWEET THEN TURNED OLD AND MUSTY (DIRTY SOCK); C/W INFO NOTICE 2017-TO15K SECTION B LEVEL 2 DETERMINE APU SOURCE OF ODOR AT THIS TIME. SYS DECONTJan 25, 2025 · N507JT · Airbus A320232SDR YENA2025012700102Switch · failedFLT#1734, SFO-BOS. (ETOPS) 'PERFORMED APU CSS IAW A49-00-01A APU START SUCCESSFUL AFTER #1 ATTEMPT. APU AUTO SHUTDOWN AFTER RUNNING 8'23'; REMOVED AND REPLACED APU DIFFERENTIAL PRESSURE SENSOR 8071KM PER AMM 49-91-14. REMOVED AND REPLACED BOTH OIL FILTER ELEMEJan 23, 2025 · N2142J · Airbus A321271NXSDR HALA20250124034Module · faultyETOPS - NEED TO REPLACE APU DMM. REMOVED AND REPLACED APU DMM PER AMM 49-73-31. OPS/BITE CHECK GOOD. OK FOR SVC.Jan 23, 2025 · N374HA · Airbus A330243
Back to JASC 4900