JASC 4990

Service difficulty reports · 2,654

Reports filed under 4990 · APU Oil 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 = '4990'
  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 ASAA2023062443712Unknown · unknownAPU GENERATOR FELL OFFLINE JUST PRIOR TO PUSHBACK. FAULT LIGHT ILLUMINATED. GROUNDED - YES. ON DEFERRAL.Jun 24, 2023 · N423AS · Boeing 737990ERSDR ASAA2023061543584Element · cloggedWHILE PERFORMING ASA TSR714484 FOUND APU DIFF PRESS/ INDICATOR BUTTON POPPED. GROUNDED - YES. REPLACED LUBE FILTER ELEMENT AND APU OIL FILTER INDICATOR REF B737-9 AMM 49-91-12 AND AMM 49-91-13 LEAK CHECK GOOD, NO FAULTS NOTED DURING GROUND VERIFICATION.Jun 15, 2023 · N919AK · Boeing 7379SDR AALA202306190302Lubrication Unit · leakingAIRCRAFT WAS GROUNDED: DIRTY SOCK SMELL ON DESCENT 15000, ENGINE IDLE ONLY, BOTH PACKS ON, APU OFF CONTINUED UNTIL ENGINE SHUTDOWN. MAINTENANCE FOUND THE APU LUBE UNIT LEAKING OIL AND REPLACED IT PER AMM 49-91-45. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS Jun 13, 2023 · N768US · Airbus A319112SDR DALA2023061304823Unknown · unknownAIRCRAFT 3138, DIRTY SOCK SMELL WHEN APU STARTED. CORRECTIVE ACTION: FOUND OIL LEAKING AT APU. PERFORMED ECS CLEAN. REPLACED OZONE CONV AND RECIRC FILTERS. (LP4854588)Jun 12, 2023 · N338NB · Airbus A319114SDR AALA202306056307O-Ring · brokenAIRCRAFT WAS GROUNDED: ODOR/FUMES IN FLIGHT DECK DIRTY SOCK SMELL ON DESCENT BETWEEN 3000-6000 FEET AND ON THE GROUND DURING TAXING IN. MAINTENANCE FOUND THE APU OIL COOLING FAN DRIVE PAD LEAKING OIL. DUE TO A BROKEN O-RING. REPLACED O-RING AND ACCOMPLISHED A May 31, 2023 · N816AW · Airbus A319132SDR ASAA2023053143414Sensor · failedMAINT LIGHT ILLUMINATED, STATUS MESSAGE APU OIL QTY. GROUNDED - YES. MAINT MESSAGE SHOWS FAULT 49-94304, OIL LEVEL SENSOR CIRCUIT FAILURE DETECTED BY APU CONTROLLER. COCKPIT OIL QTY SHOWS FULL, OIL QTY AT APU SHOWS 1 QT LOW. ACCOMPLISHED B737-9 IFIM TSK 49-90-May 31, 2023 · N964AK · Boeing 7379SDR AALA202307283041Cap · leakingAIRCRAFT WAS GROUNDED: SMELLY SOCKS ODOR ON TAKE OFF AND CLIMB OUT. ODOR DISSIPATED THEN RETURNED AT THE GATE. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. ** ORIGINAL REPORT WAS AALA202305314447** MAINTENANCE FOUND EVIDENCE OF HYDRAULIC FLUID ON THMay 27, 2023 · N152UW · Airbus A320*SDR AALA202305307853Transfer Tube · leakingAIRCRAFT WAS GROUNDED: DESCENDING THROUGH 13,000 BEGAN GETTING A DIRTY / WET SOCK SMELL THAT PERSISTED THE REMAINDER OF FLIGHT. MAINTENANCE FOUND THE APU OIL COOLING FAN OIL TRANSFER TUBE LEAKING OIL AND REPLACED THE O-RINGS.May 25, 2023 · N647AW · Airbus A320232SDR DALA2023051603925Unknown · unknownSHIP 5646 - SMKE - WHILE BOARDING AT GATE SMOKE STARTED FILLING UP THE FLIGHT DECK AND CABIN WHILE APU RUNNING. GROUND CREW NOTE APU SMOKING OUT THE EXHAUST. CORRECTIVE ACTION: CONFIRMED APU FAILURE WITH OIL TANK EMPTY AND METAL ON THE CHIP DETECTORS, APU REPLMay 14, 2023 · N546US · Boeing 757251SDR AALA202306266778Oil Cap · leakingAIRCRAFT WAS GROUNDED: BOTH PILOTS SMELLED TOXIC FUMES- MUSTY ODOR FOR MOST OF FLIGHT. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU. **SUPPLEMENTAL REPORT FOR AALA202305156778: MAINTENANCE FOUND THE APU OIL FILLER CAP LEAKING OIL AND THE APU FUEL CONMay 11, 2023 · N9013A · Airbus A319115SDR SBOY202305110001Oil Cooler · unknownTHE APU OIL COOLER WAS REPLACED AND THE AREA CLEANED FOR LEAK CHECK. A MAINTENANCE STAFF WAS IN THE COCKPIT STARTING THE APU WITH HIS MAINTENANCE CREW AT THE APU AREA WITH APU DOORS OPEN TO PERFORM THE LEAK CHECK. UPON APU START-UP, FLAMES WERE OBSERVED IN THMay 10, 2023 · Boeing 78710SDR CALA2023050901436Unknown · leakingAPU OIL QTY VERIFIED HMG OPERATES NORMAL, PLACING APU ON MEL. COMPLIED WITH MEL. DISPATCH DESK: 30 NAME: A.G. DATE: 09-MAY-23- NOC DESK: 757 NAME: DARRIN DATE: 09-MAY-23- APPROVED MEL CARD 4911C. OIL LEAK CAUSED THE APU TOMay 9, 2023 · N75861 · Boeing 757324SDR ASAA2023050143088Filter · cloggedDURING APU INSPECTION, FOUND OIL FILTER RED INDICATOR FOR LUBE FILTER ELEMENT EXTENDED. GROUNDED - YES. REMOVED AND REPLACED LUBE FILTER ELEMENT PER B737-9 AMM 49-91-13-400-801.May 1, 2023 · N291BT · Boeing 7379SDR ASAA2023042442985Lubrication Unit · faultyAPU FAILED THREE START ATTEMPTS AT FL350 WITH FAULT LIGHT THAT REMAINED ILLUMINATED. GROUNDED - YES. ACCOMPLISHED B737-900 FIM 49-40 TASK 801 STEPS F AND H(1). REPLACED APU LUBE MODULE PER B737-900 AMM 49-91-11. INSTALLATION TEST PASSED. NO LEAKS.Apr 24, 2023 · N474AS · Boeing 737990ERSDR DALA2023042403205Unknown · unknownSHIP 3306 ACFT CONDITIONED AIR HAS MUSTY DIRTY SOCK SMELL IN COCKPIT AND CABIN ON GROUND AND IN FLIGHT. CORECTIVE ACTION: T/S. A VISUAL INSPECT OF ENG 1 AND 2 INLET FOR OIL, NONE FOUND. INSOECTED APU BLEED DUCT FOR OIL, NONE FOUND. ACCOMPLISHED DECONTAMINATIONApr 23, 2023 · N806NW · Airbus A330323SDR DALA2023042403188Unknown · unknownAIRCRAFT 3159, DIRTY SOCK ODOR BELOW 10,000 FINAL APPROACH: ONLY FLIGHT DECK DISSIPATED ON LANDING. CORRECTIVE ACTION: SOURCE OF LEAKING OIL IS APU GENERATOR. ACCOMPLISHED DECONTAMINATION PROCEDURES REFERENCING A319 AMDS WORK CARD 2100- 2003. (LP 4671222)Apr 22, 2023 · N359NB · Airbus A319114SDR AALA202304261306Line · leakingAIRCRAFT WAS GROUNDED: MILD/MODERATE TRANSIENT DIRTY SOCK SMELL AFTER TAKEOFF IN FRONT HALF OF AIRPLANE. DISSIPATED AFTER 2-3 MINUTES. DID NOT RE-OCCUR IN FLIGHT. REOCCURRED ON TAXI-IN. **SUPPLEMENTAL REPORT FOR AALA202304211306: MAINTENANCE FOUND APU TO BE SOApr 20, 2023 · N922NN · Boeing 737823SDR ASAA2023041742894Oil Cooler · faultyAPU OIL MONITORING DATA SHOWS OIL CONSUMPTION TO BE TRENDING HIGHER THAN EXPECTED. GROUNDED - YES. REINSPECTED APU AREA FOLLOWING STEPS 1-4. NO HARD FAULTS FOUND. REMOVED AND REPLACED APU OIL COOLER REF AMM 49-91-41. PERFORMED OPS/LEAK CHECK. NO LEAKS NOTED.Apr 17, 2023 · N589AS · Boeing 737890SDR ASAA2023040542735Element · cloggedFOUND OIL FILTER INDICATOR DPI ON APU EXTENDED. GROUNDED - YES. SERVICED APU OIL FILTER INDICATOR REF B737-9 AMM TASK 49-91-13-600-801.Apr 5, 2023 · N934AK · Boeing 7379SDR ASAA2023032442698Module · faultyPERFORMED CSS APU START. FIRST TWO ATTEMPTS FAILED AT FL350, FAULT LIGHT ON FIRST, LOW OIL PRESSURE ON SECOND. APU STARTED ON 3RD ATTEMPT AT FL310. GROUNDED - YES. REMOVED AND REPLACED APU LUBE MODULE. REF B737-900 AMM 49-91-11.Mar 24, 2023 · N469AS · Boeing 737990ERSDR DALA2023031501884Unknown · unknownAIRCRAFT 3125, SMOKE FUMES IN CABIN OF A/C WITH ONLY APU RUNNING. CORRECTIVE ACTION: PERFORMED DECONTAMINATE THE ECS WHEN THE APU IS INOP REVERSE FLOW. (LP 9895734)Mar 11, 2023 · N325NB · Airbus A319114SDR ASAA2023030842251Filter · cloggedAPU LUBE FILTER DPI EXTENDED. GROUNDED - YES. REMOVED AND REPLACED APU LUBE FILTER AND RESET FILTER HOUSING DPI PER B737-9 AMM 49-91-12.Mar 8, 2023 · N928AK · Boeing 7379SDR AALA202303135124O-Ring · leakingAIRCRAFT WAS GROUNDED: ALL 4 FLIGHT ATTENDANTS (INBOUND) REPORTED FUMES LAST 15 MINUTES OF INBOUND FLIGHT (SMELL OF SOCKS) WITH SINUS AND THROAT IRRITATION. MAINTENANCE FOUND THE APU OIL COOLING FAN O-RING LEAKING AND REPLACED IT PER AMM 49-52-51.Mar 7, 2023 · N136AN · Airbus A320*SDR AALA202303093594Apu · leakingAIRCRAFT WAS GROUNDED: CREW REPORTED A DIRTY MUSTY ODOR DURING CLIMB AND DESCENT. **SUPPLEMENTAL REPORT FOR AALA202303073594: MAINTENANCE FOUND THE APU LEAKING OIL AND REPLACED THE APU PER TASK CARD 26L31049003. ** (CLOSED)Mar 4, 2023 · N133AN · Airbus A320*SDR ASAA2023030442234Unknown · unknownAMBER MAINT LIGHT ILLUMINATED. GROUNDED - YES. MDS STATUS INDICATES APU OIL QTY WITH A CORRELATED MAINTENANCE MESSAGE WITHIN EXTENDED - FAULT HISTORY: 49-94304 - NON-ACTIVE. ERASED LATCHED MESSAGE. RESTARTED APU AND OBSERVED CORRECT OIL QTY DISCRETE. FAULT DOEMar 4, 2023 · N952AK · Boeing 7379SDR ASAA2023030442188Filter · cloggedREF T/C N8349002, FOUND OIL FILTER INDICATOR RED BUTTON EXTENDED ON APU. GROUNDED - YES. ACCOMPLISHED OIL FILTER INDICATOR SERVICING PER B737-900 AMM 49-91-13. REMOVED AND REPLACED LUBE FILTER ELEMENT REF AMM 49-91-12 AND INSPECTED MAGNETIC DRAIN PLUG REF AMMMar 4, 2023 · N487AS · Boeing 737990ERSDR ASAA2023022242041Filter · cloggedAPU OIL FILTER DELTA P INDICATOR EXTENDED. GROUNDED - YES. ACCOMPLISHED B737-800 AMM TASK 49-91-13-600-801. REPLACED OIL FILTER ELEMENT. AND OIL FILTER INDICATOR REF AMM 49-91-13-000-802. LEAK CK GOOD.Feb 22, 2023 · N562AS · Boeing 737890SDR A6WA202302178465Apu · noneSMOKE TOILET CAUTION MSG AFTER T/O AT 1000 FT C/W QRH RETURNED TO PVD MSG CLEARED ON FINAL. NOTE APU FAILED ON THE PRIOR FLIGHT. AIRCRAFT REMOVED FROM SERVICE. INSPECTED FOUND SMOKE SMELL CAUSED BY APU FAILURE PERFORMED CLEARING OF UNUSUAL ODORS IAW AWA SFeb 17, 2023 · N458AW · Cndair CL6002B19SDR DALA2023021901252None · noneAIRCRAFT 3144, ON DESCENT IN TO MSY A SLIGHT BURNING DEICE OR BURNING OIL SMELL WAS OBSERVED. CORRECTIVE ACTION: REPLACED O-RING ON GENERATOR DRAIN. (LP 4084569) PERFORMED AMDS CARD 2100-2005 REVERSE FLOW DECONTAMINATION. NO ODOR PRESENT. (LP 4084568)Feb 17, 2023 · N344NB · Airbus A319114SDR ASAA2023020541833Not Reported · not reportedAPU OIL FILTER INDICATOR EXTENDED. GROUNDED - YES. REPLACED OIL FILTER INSPECTED MAG PLUG NO DEFECTS FOUND. RESET OIL FILTER INDICATOR. PERFORMED LEAK CHECK, NO LEAKS FOUND IN REF TO B737-9 AMM 49-91-13. ETOPS ENG OILS SERVICED IN REF TO AMM 12-13-31 C/N 93181Feb 5, 2023 · N931AK · Boeing 7379SDR ASAA2023020241781Element · cloggedFOUND APU LUBE FILTER HOUSING BUTTON POPPED. GROUNDED - YES. REPLACED APU LUBE FILTER ELEMENT. NO DEBRIS FOUND IN BOWL/FILTER. DPI RESET. LEAK CHECK GOOD. REF. B737-900 AMM 49-91-12.Feb 2, 2023 · N433AS · Boeing 737990ERSDR ASAA2023013041745Indicator · faultyAPU OIL FILTER LUBE UNIT FILTER DELTA "P" POPPED. GROUNDED - YES. REMOVED AND REPLACED APU LUBE UNIT OIL FILTER ELEMENT REF B737-800 AMM 49-91-12 OIL FILTER APPEARED TO BE CLEAN. REMOVED AND REPLACED APU OIL FILTER INDICATOR REF AMM 49-91-13. APU OIL FILTER HOJan 30, 2023 · N584AS · Boeing 737890SDR DALA2023013000751Oil System · overservicedDURING AND JUST AFTER TOUCHDOWN ALL CABIN FA'S REPORTED ELECTRICAL ODOR AND MINOR HAZE OVER COMFORT PLUS SEATS. ODOR AND HAZE DISSIPATED AFTER AIRCRAFT WAS PARKED. C/W NO GO ODI STEP 1, ISOLATED SOURCE PER J/C 0550-2001. FOUND APU OIL OVERSERVICED. PERFORMED SJan 26, 2023 · N101DU · Bombdr BD1001A10SDR YENA2023012300069Oil Cooler · failedFLT#1255, FLL-GYE. 'DIRTY SOCK SMELL START AT FL 230 WENT AWAY AT FL 210 DIRTY SOCK SMELL CAME; COMPLIED WITH INFORMATION NOTICE 2017-T015J, SECTION B1. FOUND APU LEAKING OIL, SEE ITEM 2 (REMOVED ADN REPLACED APU OIL COOLER REF AMM 49-91-44. OPS CHECK AND LEAKJan 22, 2023 · N663JB · Airbus A320232SDR DALA2023012600640Oil System · leakingSHIP 9585 -SMKE- DURING BOARDING WITH APU RUNNING PACKS, SMOKE AND ODOR FILLED THE CABIN. CORRECTIVE ACTION: MAINTENANCE FOUND THAT THE APU HAD FAILED AND DUMPED ALL ITS OIL ON THE GROUND. THE APU WAS REPLACED. THE COALESCER BAGS WERE THEN REPLACED AND A DUCT Jan 20, 2023 · N985AT · Boeing 717200SDR DALA2023012400546Oil System · leakingON APPROACH SOCK SMELL FOR ABOUT 3 MINUTES. ISOLATE & REPAIR APU LEAKS ON W/C 2100- 2005.Jan 20, 2023 · N362NB · Airbus A319114SDR AALA202301231368Apu · leakingAIRCRAFT WAS GROUNDED: AT CRUISE AN ACRID ODOR (OIL SMELL) CAME INTO THE COCKPIT FOLLOWED BY MIST WHICH DISAPPEARED QUICKLY. MAINTENANCE FOUND AN APU OIL LEAK TO BE THE ODOR SOURCE. REPLACED APU PER JOB CARD 72L3104900.Jan 15, 2023 · N730AN · Boeing 777323ERSDR AALA202301129989Packing · leakingAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORTED TOXIC FUMES DURING ALL PHASES OF FLIGHT. MAINTENANCE FOUND THE APU LOW OIL LEVEL SWITCH LEAKING OIL AND REPLACED THE PACKING ON THE SWITCH PER AMM 49-93-16. A SATISFACTORY LEAK CHECK WAS ACCOMPLISHED.Jan 10, 2023 · N112US · Airbus A320214SDR ASAA2023010971449Filter · cloggedAPU LUBE FILTER DELTA P POPPED OUT. GROUNDED - YES. REMOVED AND REPLACED FILTER REF B737-900 AMM 49-91-12. DELTA P RESET. NO DEBRIS FOUND AT THIS TIME.Jan 7, 2023 · N462AS · Boeing 737990ERSDR AALA202301177729Oil System · leakingAIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT SMELLED SMOKE / ELECTRICAL BURING ODOR IN CABIN AFTER A LIGHTENING STRIKE OCCURED AT 9, 0000 FEET. THE ODOR WAS STRONGEST IN THE AFT GALLEY AREA. MAINTENANCE ACCOMPLISHED SMOKE / ODOR / FUME TROUBLESHOOTING TASK CARD AJan 3, 2023 · N536UW · Airbus A321231SDR ASAA2022123041354Oil Filter · cloggedDURING ASA T/C 78349004 FOUND BUTTON ON THE OIL FILTER INDICATION POPPED. GROUNDED - YES. REMOVED AND REPLACED LUBE FILTER ELEMENT REF B737-800 AMM 49-91-12 OPS CHECK GOOD.Dec 30, 2022 · N581AS · Boeing 737890SDR ASAA2022123041353Oil Filter · leakingDURING APU OIL SERVICE FOUND APU OIL FILTER LEAKING. GROUNDED - YES. REMOVED & REPLACED APU LUBE FILTER HOUSING & ELEMENT LK & OPS GOOD REF B737-900 AMM 49-91-12.Dec 30, 2022 · N428AS · Boeing 737990ERSDR YENA2022122301287Apu · leakingFLT# 1475, BDL-SJU. STRONG ODOR OF WET DOG DESCENDING THROUGH 11,000 REPORTED MID CABIN BY FAS, COULD ALSO ODOR IN COCKPIT. THE ODOR WENT AWAY WHEN PACK NR 2 WAS SELECTED OFF. PERFORMED INSPECTION DUE TO ODOR EVENT LEVEL A IDENTIFIED APU INTAKE SWEAT WITH ODec 21, 2022 · N529JB · Airbus A320232SDR AALA202301049489Cooling Fan · leakingAIRCRAFT WAS GROUNDED, F/A REPORTED ODOR IN REAR OF AIRCRAFT DURING CLIMB. AIRCRAFT RETURNED TO PHL, LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU AFTER FINDING EVIDENCE OF AN OIL LEAK. MAINTENANCE REPLACED TDec 15, 2022 · N711UW · Airbus A319112SDR AALA202301049356Oil System · leakingAIRCRAFT WAS GROUNDED, DURING FINAL APPROACH, WITH GEAR DOWN, BOTH PACKS ON, & APU OFF. THERE WAS A STRONG ODOR OF DIRTY SOCKS. AFTER LANDING WITH PACKS OFF THE ODOR DISSAPATED. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU DUE TO FINDING EVIDENCE OFDec 13, 2022 · N169UW · Airbus A321211SDR AALA202212123019Cooling Fan · leakingAIRCRAFT WAS GROUNDED: DURING CLIMB BURNING FOOD SMELL IN FLIGHT DECK AND CABIN BUT OVENS WERE OFF. MAINTENANCE FOUND THE APU OIL COOLING FAN LEAKING OIL INTO THE APU INLET AND REPLACED IT PER AMM 49-41-11. A SATISFACTORY LEAK CHECK WAS ACCOMPLISHED.Dec 8, 2022 · N723UW · Airbus A319112SDR ASAA2022120341014Filter · cloggedFOUND APU LUBE FILTER RED BUTTON EXTENDED. GROUNDED - YES. REMOVED & REPLACED APU LUBE FILTER PER B737-9 AMM 49-91-13. LEAK CHECK GOOD. SERVICED APU OIL PER AMM 12-13-31.Dec 3, 2022 · N949AK · Boeing 7379SDR GTIA2022120136811Plug · looseDIRTY SOCK ODOR INTERMITTENT DURING ENTIRE FLIGHT. ODOR WAS MOST PROMINENT DURING IDLE THRUST AT LOWER ALTITUDE ( BELOW 10,000) STRONGEST ODOR WAS DURING APPROACH.-UPON INSPECTION FOUND APU OIL TANK DRIN PLUG LOOSE, PRFORMED APU & ENGINE RUN-UP ISOLATION OF PANov 30, 2022 · N531NK · Airbus A319132SDR HALA2022112800302Pressure Switch · faultedETOPS- APU AUTOSHUTDOWN APPROX 5 MINUTES AFTER REACHING THE GATE. USING TSM 49-00-81-810-849-A, FOUND OIL PRESSURE SWITCH FAULTING. REMOVED AND REPLACED 8070KM & 8071KM PER AMM 49-91-14, AND CHANGED FILTER ELEMENTS PER AMM 49-91-41. OPS AND LEAK CHECKS, BOTNov 27, 2022 · N205HA · Airbus A321271NSDR YENA2022112801158Cooling Fan · leakingFLT#379, DCA-FLL. 'DIRTY SOCK SMELL REPORTED BY FLIGHT ATTENDANT; COMPLIED WITH INFO NOTICE 2017-T015-J. NO 30-DAY HISTORY. PER TSM 05-50-00-810-085-B ODOR TYPE 1 LEVEL A. FOUND THE SOURCE OF ODOR TO BE APU OIL COOLING FAN LEAKING. ACCOMPLISHED LEVEL 1 ECS DENov 26, 2022 · N712JB · Airbus A320232
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