# Service difficulty reports: JASC 4920

A list on [JASC 4920](https://openairdocs.org/jasc/4920.md).

Reports filed under 4920 · APU Core Engine, newest first.

Page 1 of 49 · 2,430 reports

- [SDR AALA202610238257](https://openairdocs.org/sdr/AALA202610238257.md): Apu · odor · Oct 21, 2026 · N105UW · Airbus A320214
  > AIRCRAFT WAS GROUNDED: AIR CONDITIONING ODOR NOTED ON GROUND AFTER FIRST ENGINE START WITH BLEED SUPPLIED BY APU. MUSTY/MECHANICAL/SEWER SMELL DETECTEDPRIMARILY ON THE FLIGHT DECK. ODOR SEEMED TO DISSIPATE AFTER SECOND ENGINE START, BUT DETECTED AGAIN ON DESCE
- [SDR WX0A2026100532970](https://openairdocs.org/sdr/WX0A2026100532970.md): Inlet · contaminated · Oct 4, 2026 · N194NV · Airbus A320214
  > (AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL DESCENDING THROUGH 15,000 FT, APU WAS OFF. BOTH PACKS WERE ON. / C/W TASK CARD A32X-21-000-001, FOUND APU INLET W/ OIL RESIDUE. C/W AMM 21-00-00-615-802-A, NO ODORS USING ENGINE BLEED. REF AML 2212202 FOR DEFERRAL OF AP
- [SDR CALA2026100620142](https://openairdocs.org/sdr/CALA2026100620142.md): Apu · faulted · Oct 3, 2026 · N76514 · Boeing 737824
  > SMOKE ODOR CONDITIONAL INSP REQUIRED PER AMM 05-51-XX DUE TO AN INCIDENT REPORTED BY THE CREW. SMOKE IN THE COCKPIT FOLLOWED BY APU SHUT DOWN, APU GEN FEEDER CABLES APU MAINT MSG 49-72104. FOUND APU GENERATOR FEEDER CABLE BURNT. FOUND FEEDER CABLES ON APU GEN
- [SDR ASAA2026100267268](https://openairdocs.org/sdr/ASAA2026100267268.md): Apu · odor · Oct 2, 2026 · N488HA · Boeing 717200
  > APU DIRTY SOCK SMELL WITH APU AIR ON ( AUXILIARY POWER UNIT (APU)(NOTE MANIFOLD ISOLATION VALVE MUST BE OPERATIONAL)). GROUNDED - YES. REMOVED AND REPLACED APU PER AMM 49-10-00 OPS CHECK GOOD OK FOR SERVICE PLACARD REMOVED MIC UPDATED.
- [SDR ASAA2026100167208](https://openairdocs.org/sdr/ASAA2026100167208.md): Cooling Fan · failed · Oct 1, 2026 · N488HA · Boeing 717200
  > DMI 407502, STINKY SOCK SMELL W/ APU BLEED ON. ( AUXILIARY POWER UNIT (APU)(NOTE MANIFOLD ISOLATION VALVE MUST BE OPERATIONAL)). GROUNDED - YES. REMOVED AND REPLACED OIL COOLING FAN PER AMM 49-50-01. LEAK/OPS CHECK GOOD. MIC SHEET UPDATED. PLACARD REMOVED. CB
- [SDR YENA2026100200920](https://openairdocs.org/sdr/YENA2026100200920.md): Compressor · contaminated · Oct 1, 2026 · N519JB · Airbus A320232
  > FLT 1067, HPN-DJT. DURING DESCENT MODEATE MAJIK MARKER PACK 1 SELECTED OFF, SEEMED TO DISAPATE ON GROUND,APU BLEED BOTH PACKS ON,MAJIK MARKER FUMES AT GATE, COCKPIT STRONG INSANTLY. NO ODOR IN CABIN. ACCOMPLISHED INFO NOTICE 2017-T015.ACCOMPLISHED STEPSC 1-
- [SDR CALA2026090419236](https://openairdocs.org/sdr/CALA2026090419236.md): Bleed Valve · faulted · Sep 1, 2026 · N36207 · Boeing 737824
  > DUE TO ACFT DIVERSION DUE TO APU BLEED NOT TURNING OFF AFTER A BLEEDS OFF TAKE OFF, ETOPS V-FLT REQUIRED, APPLYING PLA 06921. REMOVED AND REPLACED APU BLEED VLV I.A.W. AMM 49-52-11-400-801. LEAK CHK AND OPS CHECK COMPLETE. NO FURTHER DEFECTS NOTED. PARTS USED:
- [SDR AALA202608216718](https://openairdocs.org/sdr/AALA202608216718.md): Plenum · contaminated · Aug 19, 2026 · N829AW · Airbus A319132
  > AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED DIRTY SOCK SMELL WITH APU ON - MAINTENANCE FOUND THE APU AIR INTAKE PLENUM ASSEMBLY SATURATED IN OIL AND NOTED OIL OUTSIDE THE FCU DRAIN - MAINTENANCE REPLACED THE FCU *AALA202608215048* AND THE APU INTAKE PLENUM ASS
- [SDR ABXA20260814362](https://openairdocs.org/sdr/ABXA20260814362.md): Apu · shutdown · Aug 14, 2026 · N487CM · Boeing 767360
  > DURING ENGINE START, APU AUTO SHUTDOWN. A/C RETURNED TO THE BLOCKS (BTB). MTX DEFERRED IAW 49-11-1A PLACARD INSTALLED MX PROCEDURES COMPLIED WITH AIRCRAFT REMAINS NO ETOPS. A/C RETURNED TO SERVICE.
- [SDR SWAA2026081325383](https://openairdocs.org/sdr/SWAA2026081325383.md): Apu · shutdown · Aug 9, 2026 · N8612K · Boeing 7378H4
  > DURING PUSHBACK APU SHUTDOWN AND LOW OIL PRESSURE LIGHT ILLUMINATED. T/S PER FIM 49-90 TASK 803. VERIFIED OIL LEVEL FULL. RESET SYSTEM AND OPS TEST GOOD. THIS CLEARS MEL SP1 REVERSED
- [SDR SWAA2026081359676](https://openairdocs.org/sdr/SWAA2026081359676.md): Fault Code · auto shutdown · Aug 9, 2026 · N8880G · Boeing 7378
  > APU AUTO SHUTDOWN W/FAULT LITE. FAULT LITE EXTINGUISHED. NORMAL START ON GROUND IN SAN- NO NORMALSMELL/INDICATION. FOUND FAULT CODE 49-41297 PERFORMED IFIM TASK 49-61-00-700-801 APU OPERATES NORMALLY. A/C OK TO CONTINUE.
- [SDR SCNA20260806339](https://openairdocs.org/sdr/SCNA20260806339.md): Apu · smoke · Aug 4, 2026 · N846SY · Boeing 737800*
  > WHITE SMOKE CAME OUT OF APU EXHAUST AFTER SHUT DOWN. REF AML 816815 ITEM 1. WHITE SMOKE CAME OUT OF APU EXHAUST AFTER SHUTDOWN. INSPECTED APU PER FIM 49-95 TASK 801 FOUND SMALL AMOUNT OF OIL FROM AFT DRAIN. FOUND LARGE OIL WETTING ON & AROUND MIDDLE TURBIN
- [SDR IPXA2026073160624](https://openairdocs.org/sdr/IPXA2026073160624.md): Apu · shutdown · Jul 31, 2026 · N166UP · Airbus A300F4622R
  > APU EMERGENCY SHUTDOWN DURING NR 1 ENGINE START. REPLACED LUBE/GENERATOR SCAVENGE OIL FILTER AND DRAINED AND FILLED ENGINE OIL PER AMM 49-91-12. OPS CHECK GOOD.
- [SDR ABXA20260731345](https://openairdocs.org/sdr/ABXA20260731345.md): Apu · shutdown · Jul 31, 2026 · N651GT · Boeing 767231
  > APU SHUT DOWN ON PUSHBACK AC RETURNED TO GATE (BTB) AND MTX C/W APU TEST IAW AMM 49-11-00. OPS CHECK GOOD, START APU NO FAULTS NOTED A/C REMAINS NO ETOPS.AND RETURNED AC TO SERVICE.
- [SDR CALA2026072818074](https://openairdocs.org/sdr/CALA2026072818074.md): Apu · faulted · Jul 27, 2026 · N76065 · Boeing 767424ER
  > AFTER PARKING THE APU GENERATOR FAILED. APU THEN PROCEEDED TO FAIL AND ODOR FILLED CABIN WITH SLIGHT HAZY SMOKE FILLING CABIN AS WELL. CREW COMPLETED SMOKE/ODOR IN THE PLANE QUESTIONAIRE ACCOMPLISHED MAGNETIC CHIP COLLECTOR INSPECTION IN REF TO AMM 49-27-25-20
- [SDR HNAA2026072400632](https://openairdocs.org/sdr/HNAA2026072400632.md): Bleed Valve · faulted · Jul 23, 2026 · N908AE · Emb EMB145LR
  > BLD VLV CLOSED MSG ON T/O. RAN QRH AND MESSAGE PERSISTED, WENT TO START APU AND APU FAILED WITH APU FAIL MSG FACT 23JUL26 18:15 PHL T/S IAW AMM FIM 36-11-00-810-807A BLOCK 8 AND PERFORMED OPS BLEED SYSTEM. OPS CHECK ISW AMM REF 36-00-00. FOUND NO DEFECT
- [SDR SCNA20260713291](https://openairdocs.org/sdr/SCNA20260713291.md): Apu · damaged · Jul 11, 2026 · N831SY · Boeing 73783N
  > APU EXHAUST SHOOTING SPARKS, SMOKE ODOR IN CABIN/COCKPIT. FOUND MANY TURBINE BLADES TORN AND BENT ALONG THE AFT TIPS. APU WAS DEFERRED ON L/P 848721 ITEM 2.
- [SDR SCN2026F00002](https://openairdocs.org/sdr/SCN2026F00002.md): Apu · failed · Jul 11, 2026 · N831SY · Boeing 73783N
  > APU EXHAUST SHOOTING SPARKS, SMOKE ODOR IN CABIN/COCKPIT. FOUND MANY TURBINE BLADES TORN AND BENT ALONG THE AFT TIPS. APU WAS DEFERRED ON L/P 848721 ITEM 2.
- [SDR AALA202605253799](https://openairdocs.org/sdr/AALA202605253799.md): Plenum · odor · May 22, 2026 · N9002U · Airbus A319115
  > AIRCRAFT WAS GROUNDED: REF MIC 7346904 DIRTY SOCK SMELL REPORTED BY AFT FLIGHT ATTENDANTS APU FOUND TO BE THE SOURCE OF THE SMELL. MAINTENANCE REPLACED APU INTAKE PLENUM..
- [SDR DALA2026051703034](https://openairdocs.org/sdr/DALA2026051703034.md): Apu · fumes · May 15, 2026 · N334DN · Airbus A321213
  > DECLARED EMERGENCY DUE TO FUMES IN THE COCKPIT PASSING THROUGH FL190 DURING THE APPROACH. DONNED OXYGEN MASKS AND CONTINUED TO DFW. APU WAS PREVIOUSLY DEFERRED FOR LOAD COMPRESSOR CONTAMINATION. DFW MAINTENANCE FOUND APU CONTROL C/B PUSHED IN, ALLOWING APU T
- [SDR I5P2026F00000](https://openairdocs.org/sdr/I5P2026F00000.md): Apu · inoperative · May 12, 2026 · N757QM · Boeing 75729J
  > APU INOP. REPLACED APU PER TASK CARD.
- [SDR AALA202604302696](https://openairdocs.org/sdr/AALA202604302696.md): Apu · odor · Apr 25, 2026 · N751UW · Airbus A319112
  > AIRCRAFT WAS GROUNDED: FA REPORTS ROW 14 THRU 19 HAS A FOUL ODOR. MAINTENANCE REPLACED APU
- [SDR YENA2026042700431](https://openairdocs.org/sdr/YENA2026042700431.md): Compressor · contaminated · Apr 24, 2026 · N595JB · Airbus A320232
  > FLT# 1245, ISP-PBI. "IMMEDIATE OIL FUME SMELL W/ ASSOC. SYMPTOMS ON DECENT ONCE HPV'S KICKED IN. PACK ONE OFF HELPED BUT STILL NOTICEAABLE; ACCOMPLISHED INFO NOTICE 2017-TO15M STEPS 1 AND 2 IDENTIFIED ODOR TO BE A TYPE 1 APU LOAD COMPRESSOR,CLEANED OIL AND WI
- [SDR DALA2026042202564](https://openairdocs.org/sdr/DALA2026042202564.md): Engine · failed · Apr 19, 2026 · N927AT · Boeing 717200
  > SMKE/FUME - PRIOR TO PUSH, CREW REPORTED WHITE HAZY SMOKE AND AN OIL SMELL IN THE CABIN FOLLOWED BY A HARD CLUNK AND AN APU AUTO SHUTDOWN. RAMP REPORTED FLAMES IN APU EXHAUST. FOUND APU CHIP DETECTOR FULL OF METAL AND SUSPECTED APU INTERNAL FAILURE. APU REPL
- [SDR I5PA2026041775702](https://openairdocs.org/sdr/I5PA2026041775702.md): Apu · faulted · Apr 17, 2026 · N757QM · Boeing 75729J
  > FLIGHT MGE301, APU INFLIGHT START FAILED. OPEN
- [SDR WX0A2026040832779](https://openairdocs.org/sdr/WX0A2026040832779.md): Plenum · contaminated · Apr 5, 2026 · N203NV · Airbus A320214
  > (AIRCRAFT NOT GROUNDED) DIRTY SOCK SMELL ON DESCENT, CORUSON REPORT SUBMITTED / PERFORMED TC 21-000-001, VERIFIED APU INLET PLENUM IS CLEAN, NO FLUID NOTED. FOUND SMELL IS REPRODUCED WITH ONLY PACK 2 RUNNING. PACK 2 DEFERRED REF. LP # 2088142, M313 CREATED MDD
- [SDR IPXA2026040281014](https://openairdocs.org/sdr/IPXA2026040281014.md): Apu · inoperative · Apr 1, 2026 · N396UP · Boeing 767346
  > EMERGENCY DECLARED DESCENDING THRU APPROXIMATELY 11000, APT FAULTS, APU AUTO SHUTDOWN RESULTING IN SINGLE ELECTRICAL SOURCE. RAN QRT,APU CAME BACK UP ONLINE. PREVIOUS RESET APU GENERATOR SO WE DID NOT ATTEMPT A SECOND PER FIM 24-20 TASK 805, REPLACED APU GCU
- [SDR DALA2026033002096](https://openairdocs.org/sdr/DALA2026033002096.md): Inlet · dirty · Mar 26, 2026 · N355NW · Airbus A320212
  > FA REPORTS DIRTY SOCK ODOR IN AFT CABIN. ACFT AT GATE JUST PRIOR TO PUSH BACK WITH APU ON. FOLLOWED NO GO PROCEDURES. FOUND APU INLET WITH EXCESSIVE GRIM BUILDUP. CLEANED INLET IAW AMDS 1916-2001. RAN APU BLEED WITH PACKS ISOLATED & TOGETHER USING CABIN AIR
- [SDR DALA2026032602016](https://openairdocs.org/sdr/DALA2026032602016.md): Apu · odor · Mar 25, 2026 · N363NB · Airbus A319114
  > RAN APU WITHOUT BLEED FOR 8 MINUTES BEFORE TURNING ON BLEED WHEN BLEED TURNED ON DIRTY SOCKS SMELL STARTED, RAN WITH BLEED FOR ABOUT 1 MINUTE AND THE SMELL GOT STRONGER, TURNED BLEED OFF SMELL WENT AWAY. FLIGHT ATTENDANTS DID NOT SMELL IT BUT BOARDING DOOR WAS
- [SDR CALA2026032314733](https://openairdocs.org/sdr/CALA2026032314733.md): Apu · faulted · Mar 19, 2026 · N840UA · Airbus A319131
  > SMOKE FUME EVENT DURING ENGINE 1 START AFT CABIN WAS BAD FLT DEC K HAD FUMES TOO. INSPECTED APU IAW TASK 49-00-00-200-816-A, FOUND SMOKE AND OIL RESIDUE IN THE COMPARTMENT. REMOVED HEAT SHIELD AROUND THE AFT TURBINE SECTION FOUND UPPER & LOWER LUBRICATION LI
- [SDR JJBA20260303001](https://openairdocs.org/sdr/JJBA20260303001.md): Apu · contaminated · Mar 2, 2026 · N17169 · Emb EMB145XR
  > THICK ACCURATE (ELECTRICAL/MECHANICAL SMELL) SMOKE COMING FROM THE VENTS IN THE CABIN AND FLIGHT DECK DURING CLIMBOUT. DEICED WITH TYPE 1 AND 4 PRIOR TO DEPARTURE. CAPTAIN SAID IT WASN’T DEICE FLUID SMELL. OCCURRED ON GEAR UP AROUND 700 FEET NOTICED SMOKE COMI
- [SDR FKEA202602230001](https://openairdocs.org/sdr/FKEA202602230001.md): Turbine Case · cracked · Feb 17, 2026 · N3410 · Cessna 560XL
  > CREW AND PASSENGERS NOTICED THE SMELL OF EXHAUST AFTER THE APU WAS STARTED ON THE DECENT FOR LANDING. MAINTENANCE WAS CALLED TO TROUBLESHOOT THE CAUSE AFTER LANDING. ON INSPECTION, THEY FOUND THE APU TURBINE HOUSING HAD A CRACK IN IT AT ABOUT THE 5 O'CLOCK POS
- [SDR AALA202602129663](https://openairdocs.org/sdr/AALA202602129663.md): Apu · odor · Feb 10, 2026 · N773XF · Airbus A319112
  > AIRCRAFT WAS GROUNDED: INBOUND FLIGHT ATTENDANTS REPORTED THAT ON THE DECENT IN THE KEY WEST BELOW 10,000 FT THEY SMELT A VERY STRONG OILY, CAR GARAGE, MUSTY SOCK ODOR SMELL ONE OF THEM FELT FLUSH THE OTHER ONE BEGAN TO GET SYMPTOMS OF A HEADACHE. DURING PRE-
- [SDR DALA2026021701070](https://openairdocs.org/sdr/DALA2026021701070.md): Inlet · contaminated · Feb 9, 2026 · N352NB · Airbus A319114
  > DURING DESCENT AROUND 10,000 FT AN ODOR WAS NOTICE THAT SEEMED TO SMELL LIKE A MUSTY BURNING. IT WAS SHORT LIVED, BUT RETURNED ON THE GROUND. WORK CARRIED 0550-2002 WAS ACCOMPLISHED TO IDENTIFY ISSUE. HEAVY OIL SATURATION WAS FOUND IN APU INLET UP INSIDE ENTI
- [SDR DALA2026020300809](https://openairdocs.org/sdr/DALA2026020300809.md): Apu · degraded · Jan 29, 2026 · N112DU · Airbus BD5001A10
  > FIRE/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: A
- [SDR ABXA20260128033](https://openairdocs.org/sdr/ABXA20260128033.md): Apu · shutdown · Jan 28, 2026 · N226CY · Boeing 767383
  > ON TAXI OUT, APU AUTO SHUT OFF 2 TIMES. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED IAW ABX-49-11-1A. AIRCRAFT RETURNED TO SERVICE.
- [SDR GTIA2026012939262](https://openairdocs.org/sdr/GTIA2026012939262.md): Inlet · contaminated · Jan 26, 2026 · N644NK · Airbus A320232
  > SUSPECTED FUME EVENT 2000 FT DURING APPROACH-PERFORMED TSM 05-50-00-810-831-A. FOUND SOURCE OF ODOR TO BE TYPE 8 FOR DE-ICING FLUID. PERFORMED INSPECTION OF APU PER AMM 49-16-00-210-802. FOUND DEICING FLUID AT AFT FUSE UNDER BELLY AND APU INLET. CLEANED AREA T
- [SDR ABXA20260121024](https://openairdocs.org/sdr/ABXA20260121024.md): Apu · auto shutdown · Jan 21, 2026 · N764CK · Boeing 7673P6
  > DURING TAXI OUT, APU SHUT ITSELF DOWN ATTEMPTED RESTART AND FAULTED AGAIN. AIRCRAFT RETURNED TO BLOCKS (BTB). DEFERRED IAW MEL 29-11-1A CAT I PLAC INSTALLED MAINT. PRECED. C/W. A/C REMAINS NON-ETOPS. REF LP 39222-59/1. AIRCRAFT RETURNED TO SERVICE.
- [SDR DALA2026011700394](https://openairdocs.org/sdr/DALA2026011700394.md): Apu · contaminated · Jan 16, 2026 · N326NB · Airbus A319114
  > ODOR IN FLIGHT DECK WITH APU BLEED ON DURING PREFLIGHT. FOUND POSSIBLE DE ICE FLUID INJECTED INTO APU. (JH 924595) C/W LEVEL A AND B DECONTAMINATION IAW AMM 21-00-00. REPLACED RECIRC FILTERS. REF LOG 1403258. (LP: 8394134)
- [SDR CALA2026010612723](https://openairdocs.org/sdr/CALA2026010612723.md): Apu · faulted · Jan 5, 2026 · N19141 · Boeing 757224
  > AFTER STARTING APU & DISCONNECTING GROUND POWER, CREW & PAX SAW & SMELLED SMOKE. WAS WHITE & HAD A BURNING ELECT ODOR. APU SHUTDOWN AUTOMATICALLY & CREW POWERED DOWN ADDITIONAL SYS. PERFORMED APU MAGNETIC CHIP DETECTOR INSP, FOUND METAL ON COMPRESSION BEARIN
- [SDR DALA2026010500055](https://openairdocs.org/sdr/DALA2026010500055.md): Apu · contaminated · Jan 3, 2026 · N118DY · Airbus A321211
  > FUME - DECLARED EMERGENCY DUE TO A STRONG ODOR IN THE COCKPIT. POSSIBLE SOURCE OF SMELL WAS DE-ICING FLUID IN THE APU INLET, BUT THE SMELL COULD NOT BE DUPLICATED. PERFORMED LEVEL A DECONTAMINATION. (LP 8068890, 1382926)
- [SDR AALA202601018483](https://openairdocs.org/sdr/AALA202601018483.md): Apu · odor · Dec 29, 2025 · N708UW · Airbus A319112
  > AIRCRAFT WAS GROUNDED: DIRTY SOCK FUMES BELOW 10,000 IN ALL PHASES OF FLIGHT. ESPECIALLY DOMINANT DURING POWER CHANGES, IDLE TO ADVANCED SETTINGS. MAINTENANCE DETERMINED APU WAS SOURCE OF ODOR, APU WAS CHANGED PER SOF J/C'S AND ACCOMPLISHED ON J/C26L3049003.
- [SDR AALA202601108908](https://openairdocs.org/sdr/AALA202601108908.md): Apu · contaminated · Dec 27, 2025 · N770UW · Airbus A319112
  > AIRCRAFT WAS GROUNDED: WHEN AIRCRAFT WENT TO IDLE ON DESCENT, FO AND MYSELF NOTICED HEAVY "DIRTY SOCK" SMELL. IT WAS ONLY IN COCKPIT. MAINTENENCE DEONTAMINATED APU AND ACCOMPLISHED J/C 26L00021002 AND 26L00021014, NO LEAKS NOTED FROM APU OR COMPONENTS. OK FOR
- [SDR QXEA2025122900379](https://openairdocs.org/sdr/QXEA2025122900379.md): Engine · smoke · Dec 27, 2025 · N667QX · Emb ERJ170200LR
  > FLIGHT 2095. RAMP CREW REPORTED SMOKE OUT OF APU AS WELL AS OIL ON BOTTOM OF TAIL CONE. REMOVED FROM SERVICE. PLACED ON MEL. MEL CLEARED BY. PERFORMED GVI OF TAIL CONE AREA, NDN. PERFORMED APU OPS CHECK IAW AMM 49-10-00-700-801-A, OPS TEST GOOD. PLACARDS REMO
- [SDR CALA2025123012511](https://openairdocs.org/sdr/CALA2025123012511.md): Actuator · faulted · Dec 26, 2025 · N485UA · Airbus A320232
  > APU AUTO SHUTDOWN WITH ODOR IN CABIN. APPLIED MEL4910B LAST LEG REPORT CHECK OIL COOLER ASSY & IGV ACTUATOR WHEN RUNNING APU AND BOTH PACKS, APU BLEED 10 PSI, AND WHEN BOOSTED 14 PSI. IAW TSM 49-00-00-810-896-A, APU OIL LEVEL OK, CHECKED COOLER FOR BLOCKAGE I
- [SDR NACA2025121700001](https://openairdocs.org/sdr/NACA2025121700001.md): Shutoff Valve · stuck · Dec 17, 2025 · N563NC · Boeing 7673BG
  > APU ECU SELF TEST SHOWS FAULT - IGV ACT. PERFORMED APU ECU BITE TEST IAW AMM 49-61-05-742-045. NO FAULTS FOUND. BITE TEST PASSED. FOUND APU SHUTOFF VALVE STUCK IN CLOSED POSITION. RELEASED THE VALVE, SYSTEM CHECKED OK IAW AMM 49-11-00-802-002.
- [SDR DXTA2025121506096](https://openairdocs.org/sdr/DXTA2025121506096.md): Apu · contaminated · Dec 11, 2025 · N739QS · Bombdr BD1001A10
  > DURING DESCENT THROUGH 9000 FEET, BOTH PILOTS NOTICED STRONG, EXHAUST SMELL IN THE COCKPIT. ENVIRONMENTAL WERE TRANSFERRED TO THE APU, WHICH MINIMIZED THE SMELL MOMENTARILY. THE SMELL WAS CLOSER TO EXHAUST, NOT DEICING FLUID, NOT ACRID, OR ELECTRICAL. CORRECTI
- [SDR DALA2025121209083](https://openairdocs.org/sdr/DALA2025121209083.md): Apu · contaminated · Dec 11, 2025 · N343NB · Airbus A319114
  > VERY STRONG DIRTY SOCK/MUSTY ODOR AFTER APU TURNED ON AND PACKS TURNED ON. A/C WAS ON EXT AIR W/ APU OFF WHEN WE ARRIVED. ODOR STARTED AFTER APU TURNED ON. PERFORMED GVI OF APU INLET. FOUND PUDDLE OF DEICE FLUID UNDER BULKHEAD DRAIN AND APU INLET CLEANED. PE
- [SDR SWAA2025120442741](https://openairdocs.org/sdr/SWAA2025120442741.md): Apu · shutdown · Dec 4, 2025 · N913WN · Boeing 7377H4
  > AT CRUISE FL 400 RECEIVED APU LOP LIGHT. APU DID AUTO SHUTDOWN NH30. PERFORMED OPERATONAL TEST OF APU AND TEST PASS IAW AMM 49-11-00.
- [SDR CALA2025111411216](https://openairdocs.org/sdr/CALA2025111411216.md): Inlet Door · corroded · Nov 11, 2025 · N17128 · Boeing 757224
  > (SDR)(B757-MP-2000-53-1-0026) THROUGH ACCESS PANEL 311AL APU INL ET DOOR LOWER STRAP BETWEEN 1787 TO 1825 WITH EXFOLIATION DOT 07 -024. REF NR 134577. SFR REPORTING ONLY FABRICATED APU INLET DOOR STRAP IAW SRM 53-80-15-2R. REPLACED NE W INLET DOOR APU STRAP IA

Next page: https://openairdocs.org/jasc/4920/reports.md?page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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
```

This list as a web page: https://openairdocs.org/jasc/4920/reports

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