# Service difficulty reports: JASC 4950

A list on [JASC 4950](https://openairdocs.org/jasc/4950.md).

Reports filed under 4950 · APU Bleed Air System, newest first.

Page 1 of 19 · 949 reports

- [SDR I5PA2026090968804](https://openairdocs.org/sdr/I5PA2026090968804.md): Valve · intermittent · Sep 9, 2026 · N688SL · Boeing 757230
  > ETOPS SIGNIFICANT REPORT. APU PNEUMATIC SHUTDOWN VALVE INTERMITTENT. REPLACED APU PNEUMATIC SHUTOFF VALVE PER APPLICABLE AMM
- [SDR I5PA2026090768803](https://openairdocs.org/sdr/I5PA2026090768803.md): Switch · inoperative · Sep 7, 2026 · N688SL · Boeing 757230
  > ETOPS SIGNIFICANT REPORT. APU PNEUMATICS INOP. REPLACED APU GEN DPI SWITCH PER APPLICABLE AMM.
- [SDR I5PA2026090288801](https://openairdocs.org/sdr/I5PA2026090288801.md): Apu · inoperative · Sep 2, 2026 · N888LT · Boeing 757230
  > ETOPS SIGNIFICANT REPORT, APU PNEUMATICS INOPERATIVE. REPLACED APU PER APPLICABLE AMM
- [SDR YENA2026090400725](https://openairdocs.org/sdr/YENA2026090400725.md): Transducer · failed · Sep 1, 2026 · N4062J · Airbus A321271NX
  > FLT 1621, LHR-BOS. (ETOPS) APU BLEED FAULT ( APU BLEED AIR SUPPLY SYSTEM). R & R APU DIFF PRESSURE TRANSDUCER IAW AMM 49-51-16. OPS TEST SATISFACTORY. GROUND VERIFICATION OF APU BLEED IAW AMM 49-00-00 SATISFACTORY. THIS CLEARS MDDR 629063.
- [SDR CALA2026083119034](https://openairdocs.org/sdr/CALA2026083119034.md): O-Ring · damaged · Aug 31, 2026 · N73406 · Boeing 737924
  > APU AUTO SHUTDOWN CABIN ODOR ASSOCIATED NOTED IN CABIN APU BITE SHOWED ADD OIL. SVCD APU OIL. PERFORMED GVI AND FOUND APU BLEED DUCT MISSING HARDWARE. REPORTED APU BLEED AIR DUCT MISSING HARDWARE, WILL NEED TO BE REPLACED MISSING O-RING SEAL AT APU BLEED DISC
- [SDR SWAA2026082492036](https://openairdocs.org/sdr/SWAA2026082492036.md): Bleed Valve · odor · Aug 20, 2026 · N8773Q · Boeing 7378
  > WITH APU BLEED ON, FOUL ODOR PRESENT AND ERRATIC DUCT PRESSURE WITH APU BLEED ON. R & R APU BLEED AIR VALVE IAW AMM 49-52-11 EV E060454. OPS CHKD GOOD.
- [SDR DALA2026081904741](https://openairdocs.org/sdr/DALA2026081904741.md): O-Ring · leaking · Aug 16, 2026 · N848DN · Boeing 737932ER
  > DURING TAXI IN SMELLED STRONG FUMES IN THE FLIGHT DECK. MAINTENANCE OBSERVED A LOT OF SMOKE FROM L ENG. NO OBSERVED ENGINE ABNORMAL READINGS, PACKS WERE GETTING AIR FROM APU WHEN ODORS BEGAN. REMOVED LPT FLANGE ASSY IAW AMM 72-56. GVI EXPOSED AREAS. INSTALLED
- [SDR I5PA2026081388802](https://openairdocs.org/sdr/I5PA2026081388802.md): Actuator · faulted · Aug 13, 2026 · N888LT · Boeing 757230
  > FLIGHT: MGE502M ETOPS: AIRCRAFT RETURNED TO GATE DUE TO ENGINE STABILIZATION ISSUE AFTER ENGINE START. FOUND APU BLEED PRESSURE LOW. FAULT ISOLATED TO APU IGV ACTUATOR. REPLACED ACTUATOR PER APPLICABLE AMM
- [SDR I5PA2026081119303](https://openairdocs.org/sdr/I5PA2026081119303.md): Sensor · faulty · Aug 11, 2026 · N193AN · Boeing 757223
  > APU BLEED PRESSURE LOW, REPLACED APU FLOW SENSING MODULE IAW AMM
- [SDR IPXA2026081116362](https://openairdocs.org/sdr/IPXA2026081116362.md): Bleed Air Sys · odor · Aug 11, 2026 · N126UP · Airbus A300F4622R
  > UPON TURNING ON APU BLEED AIR, NOTICED A STRONG FUEL ODOR COMING OUT OF THE VENTILATION AREAS IN COCKPIT AND SUPERNUMARY COMPARTMENT. T/S AND FOUND TORQUE MOTOR ON APU FUEL CONTROL LEAKING FUEL INTO THE APU INTAKE. R/R TORQUE MOTOR SEAL PER CMM 49-31-61. OPS A
- [SDR HNAA2026080400646](https://openairdocs.org/sdr/HNAA2026080400646.md): Bleed Air Sys · leaking · Aug 4, 2026 · N655AE · Emb EMB145LR
  > CREW NOTIFIED CLT MX OF EXHAUST FUMES IN COCKPIT. CLT MX CREW REPORTED SMELL IN COCKPIT, CABIN NORMAL, FUTHER TROUBLESHOOTING FOUND APU BLEED CAUSE OF FUMES AND WAS PUT ON MEL. A/C DEPARTED WITH NO FURTHER ISSUES IN FLIGHT.
- [SDR I5PA2026072488803](https://openairdocs.org/sdr/I5PA2026072488803.md): Module · faulty · Jul 24, 2026 · N888LT · Boeing 757230
  > APU INOP. R & R FLOW SENSING MODULE PER AMM, OPS CHECK NORMAL.
- [SDR DALA2026061603604](https://openairdocs.org/sdr/DALA2026061603604.md): Bleed Valve · cracked · Jun 14, 2026 · N3757D · Boeing 737832
  > FA.S NOTED BURNING ODOR MID CABIN. FLOOR IS HOT TO THE TOUCH. VERIFIED CRACK ON VALVE NO OTHER DEFECTS AROUND SURROUNDING AREA. BEGUN REMOVING APU BLEED VALVE PER B737 AMM 36-13. INSTALLED APU PNEUMATIC DUCT AND TIGHTENING V-CLAMPS PER B737 AMM 36-13. PERFORME
- [SDR IPXA2026042634350](https://openairdocs.org/sdr/IPXA2026042634350.md): Clamp · cracked · Apr 4, 2026 · N575UP · Boeing 74744AF
  > CRACKED CLAMP - APU ACOC COOLING DUCT. I.A.W.AMM 49-51-04-004-001 REV116 AND AMM 49-51-04-404-011 REV116 REPLACED THE CLAMP WITH NEW.
- [SDR CALA2026021013665](https://openairdocs.org/sdr/CALA2026021013665.md): Bleed Valve · faulted · Feb 6, 2026 · N69847 · Boeing 737924ER
  > DUAL BLEED INDICATION, DURING TROUBLESHOOTING IAW TSM 49-55 TASK 803 UP TO AND INCLUDING STEP E. NO FAULTS IN APU BITE. APU BLEED LIGHT HIT MULTIPLE TIMES. LOGPAGE FOUND 7718787 FOUND APU BLEED VALVE REMAINED OPEN WITH SWITCH OFF. PER FIM 49-55 TASK 803, R &
- [SDR ABXA20260130038](https://openairdocs.org/sdr/ABXA20260130038.md): Pneumatic System · failed · Jan 30, 2026 · N650GT · Boeing 767231
  > DURING TAXI OUT, APU PNEUMATICS INOP. A/C RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED PER MEL 49-11-1-1. PLACARD INSTALLED, CAT C DUE DATE 2/9/26. MAINT. PROCEDURES 36-11-4 C/W. AIRCRAFT RETURNED TO SERVICE.
- [SDR DALA2026012900704](https://openairdocs.org/sdr/DALA2026012900704.md): Apu · odor · Jan 27, 2026 · N329NB · Airbus A319114
  > DIRTY SOCK SMELL WHEN APU BLEED SELECTED ON. SEE MD-ODI LOG 1420595 FOR WORK PERFORMED AND CORRECTIVE ACTION. (LP: 8035639)
- [SDR DALA2025102307761](https://openairdocs.org/sdr/DALA2025102307761.md): Bleed Air Sys · contaminated · Oct 19, 2025 · N818DA · Boeing 737932ER
  > (LOG 8004328) ODOR ON T/O DISSIPATED WHILE CLIMBING ODOR RETURNED WHILE ON APPROACH THROUGH FL180. ISOLATED ODOR FROM APU BLEED AIR. PERFORMED OIL DECONTAMINATION. COMPLETED BLACK LIGHT USE AT APU DUCT, LIGHT OIL RESIDUE NOTED. DUCT REASSEMBLED. BLACK LIGHT US
- [SDR I5PA2025092568805](https://openairdocs.org/sdr/I5PA2025092568805.md): Module · faulted · Sep 25, 2025 · N688SL · Boeing 757230
  > APU PNEUMATICS INOP. R & R APU FLOW SENSING MODULE PER AMM. OPS CHECK NORMAL.
- [SDR DALA2025082206260](https://openairdocs.org/sdr/DALA2025082206260.md): Bleed Valve · faulted · Aug 21, 2025 · N860NW · Airbus A330223
  > ATO DUE TO ENG THRUST LOSS BLEED CONFIG ECAM MSG WHEN T/O POWER WAS SELECTED. R & R APU BLEED VALVE. OPS CHECK GOOD. (7355668)
- [SDR YENA2025081200825](https://openairdocs.org/sdr/YENA2025081200825.md): Sensing Element · faulted · Aug 11, 2025 · N2169J · Airbus A321271NX
  > FLT#348, LAS-JFK. (ETOPS) "AIR APU BLEED LEAK ECAM FOLLOWED BY ENG 1 BLEED AND PACK 1 FAULT ( APU BLEED AIR SUPPLY SYSTEM); REF LOG PAGE 4292814 ITEM 2 (REPLACED APU OVERHEAT SENSING ELEMENTS 18HF AND Q9HF IAW AMM 36-22-17. OPS CHK GOOD) REPLACED SENSING ELEM
- [SDR AALA202508056197](https://openairdocs.org/sdr/AALA202508056197.md): Inlet Door · open · Aug 3, 2025 · N329SL · Boeing 7378
  > AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: DURING CLIMBOUT THERE WERE CONTINUOUS AIRFRAME VIBRATIONS AS AIRCRAFT ACCELERATED TO CLIMB SPEED. AIRCRAFT EMERGENCY LANDED SAFELY AT PHL. UPON LANDING APU INLET DOOR WAS FULLY OPEN WHILE OM MEL 49-51. A
- [SDR DALA2025072905697](https://openairdocs.org/sdr/DALA2025072905697.md): Duct · damaged · Jul 24, 2025 · N127DU · Airbus BD5001A10
  > APU HIGH PRESSURE BLEED DUCT HAS PLY SEPARATION AT FIRE LOOP STANDOFF, 10 INCHES FWD OF FRAME 85. PER AMDS, REQUIRES CUSTOMER RESPONSE CENTER NOTIFICATION. SCEPTRE LOG PAGE ENTERED FOR SDR REPORTING. SUMMARY SEE NR FOR ADDITIONAL INFORMATION 066-0001:3610-2002
- [SDR DXTA2025062003932](https://openairdocs.org/sdr/DXTA2025062003932.md): Shutoff Valve · faulted · Jun 17, 2025 · N503QS · Cessna 680A
  > WHEN STARTING ENGINES WITH APU RUNNING, APU BLEED AIR OFF, HEAVY SMELL OF JET EXHAUST IN CABIN AND COCKPIT. CREW NOTICED THAT WHEN THE APU BLEED AIR KNOB WAS SELECTED OFF, THE WHITE APU BLD VALUE CLOSED CAS MESSAGE NEVER APPEARED. REPLACED APU BLEED AIR SHUT
- [SDR NACA2025072800002](https://openairdocs.org/sdr/NACA2025072800002.md): Warning Message · false activation · Jun 11, 2025 · N565NC · Boeing 7673BG
  > APU DUCT PRESSURE LOW AT ENG STARTUP. PERFORMED APU DUCT BLEED AIR OPS CHECK IAW B767 AMM 36-00-00-862-025 OPS CHECK GOOD NO LEAKS FOUND.
- [SDR CALA2025060505286](https://openairdocs.org/sdr/CALA2025060505286.md): Surge Valve · faulted · Jun 2, 2025 · N17139 · Boeing 757224
  > F/AS REPORTED A THUMPING SOUND AND VIBRATION UNDE R THE AFT GALL EY JUMPSEA T. STARTED B4 GEAR DODEBRIEFED CREW SUSPECT APU BLEED VALVE. WITH APU RUNNING AND APU BLEED ON, PACKS RUNNING. WHEN EITHER PACK IS TURNED OFF, THE APU BLEED DUCT IN A/C AND WHEEL SHUTT
- [SDR YENA2025060200557](https://openairdocs.org/sdr/YENA2025060200557.md): Bleed Air Sys · faulted · Jun 1, 2025 · N979JT · Airbus A321231
  > FLT#2348, LAS-JFK. (AIRCRAFT PERFORMED AN AIR TURN BACK TO LAS).' AIR APU BLEED FAULT; PERFORMED OPS TEST BMC#1 MIAW AMM 36-11-00 AND OPS CHK APU BLEED IAW AMM 26-12-00 NO FAULT ON THIS TIME A/C OK FOR SVC.'
- [SDR DALA2025043003336](https://openairdocs.org/sdr/DALA2025043003336.md): Bleed Air Sys · odor · Apr 27, 2025 · N106DU · Airbus BD5001A10
  > 800 FT ON APPROACH FO SMELLED DIRTY SOCK ODER, 500 FT CA SMELLED IT AS WELL.APU WAS STARTED ONCE LANDED.R BLEED TURNED OFF SMELL DISAPPEARED. DUCT BURNOUT C/ W AGAIN WITH RT ENG PER AMDS CARD 0550-2008.LT ENG BLEED LOCKED BACK PER AMP 36-11 AS NOTED IN LOG #
- [SDR CALA2025042304169](https://openairdocs.org/sdr/CALA2025042304169.md): Duct · leaking · Apr 21, 2025 · N18223 · Boeing 737824
  > AIR/VENT/GRILLE BY FEET ROW 25/ LEFT SIDE IS HOT AND HAS A BURNI NG SMELL WITH APU BLEED AIR ON AND PACKS RUNNING ROW 25 HAS A HISSING SOUND AND FLOOR IS HOT. WITH APU BLEED AIR OFF AND LEFT ENGINE RUNNING AND PACK RUNNING NO HISSING SOUND HEARD AND ROW 25 IS
- [SDR ABXA20250421083](https://openairdocs.org/sdr/ABXA20250421083.md): Bleed Valve · warning message · Apr 21, 2025 · N1427A · Boeing 767306
  > ON TAXI OUT, APU BLEED VALVE EICAS MSG ILLUMINATED. AIRCRAFT RETURNED TO BLOCKS (BTB). MAINTENANCE DEFERRED APU IAW MEL ABX-49-11-1A. PLACARD INSTALLED. MX PROCEDURES C/W. NO ETOPS. AIRCRAFT RETURNED TO SERVICE.
- [SDR AALA202504049752](https://openairdocs.org/sdr/AALA202504049752.md): Bleed Valve · failed · Apr 3, 2025 · N973NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: FLIGHT ATTENDANT REPORTS INTERMITTENT SULFUR LIKE ODOR AROUND AREA OF FORWARD SERVICE DOOR BY COAT CLOSET. ACCOMPLISHED JOB CARD 08L00021001. INSPECTED CABIN FOR SULFUR TYPE ODORS. UNABLE TO DUPLICATE. RAN PACKS SEVERAL MINUTES WHILE CYC
- [SDR AALA202504012772](https://openairdocs.org/sdr/AALA202504012772.md): O-Ring · cut · Mar 24, 2025 · N972AN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: ABOUT 5 MINUTES AFTER ENGINE START CABIN WAS NOT COOLING DOWN. WE SWITCHED TO MAX COOLING FROM THE APU. ABOUT 30 MINUTES LATER 3 OF 4 FLIGHT ATTENDANT AND SOME PASSENGERS COMPLAINED OF SMELLING FUMES AND ASLIGHT HEADACHE. IT WAS MOSTLY A
- [SDR YENA2025032400304](https://openairdocs.org/sdr/YENA2025032400304.md): Apu · odor · Mar 23, 2025 · N517JB · Airbus A320232
  > FLT#583, JFK-MCO.' ON DESCENT BELOW 10000 FEET NOTICED STRONG DIRTY SOCK SMELL ON SHORT FINAL FA'S CALLED TO COMPLAIN OF A POSSIBLE FUME EVENT IN PROGRESS. AFTER LANDING DISSIPATED; COMPLIED WITH INFO NOTICE 2017-T015K SECT B2. FOUND SOURCE OF SMELL TO COME FR
- [SDR HALA20250220066](https://openairdocs.org/sdr/HALA20250220066.md): Duct · damaged · Feb 19, 2025 · N388HA · Airbus A330243
  > ETOPS - FOUND APU BLEED DUCT DAMAGED BETWEEN COMPRESSOR AND SURGE VALVE. REMOVED AND REPLACED APU BLEED DUCT BETWEEN COMPRESSOR AND SURGE VALVE PER AMM 49-51-42. LEAK CHECK GOOD. OK FOR SERVICE
- [SDR I5PA2025021768804](https://openairdocs.org/sdr/I5PA2025021768804.md): Surge Valve · faulty · Feb 17, 2025 · N688SL · Boeing 757230
  > FLT NO: N/A (MX INSP) ESI - APU AUTO SHUTDOWN. R/R APU SURGE VALVE. OPS CHECK NORMAL.
- [SDR I5PA2025021768803](https://openairdocs.org/sdr/I5PA2025021768803.md): Apu · faulty · Feb 17, 2025 · N688SL · Boeing 757230
  > FLT NO: N/A (MX INSP) ESI - APU BLEED INOP. R/R APU PER AMM 49-11-01. OPS CHECK NORMAL.
- [SDR I5PA2025021068801](https://openairdocs.org/sdr/I5PA2025021068801.md): Check Valve · worn · Feb 10, 2025 · N688SL · Boeing 757230
  > FLT NO: N/A (MX INSP). ESI - APU CHECK VALVE WORN. R/R APU BLEED AIR CHECK VALVE PER AMM 36-11-11.
- [SDR ABXA20250206034](https://openairdocs.org/sdr/ABXA20250206034.md): Bleed Air Sys · faulted · Feb 6, 2025 · N762CK · Boeing 7673P6
  > DURING TAXI WHILE STARTING ENGINE APU DOES NOT HAVE PNEUMATIC AIR FOR ENGINE START,A/C THEN RETURNED TO THE GATE (BTB) AND MTX GROUNDED A/C. MTX DEFERRED APU AIR FOR DEPARTURE IAW MEL ABX-49-11-1-1. AND RETURNED A/C TO SERVICE. A/C DEPARTED
- [SDR I5PA2025012768802](https://openairdocs.org/sdr/I5PA2025012768802.md): Module · faulty · Jan 27, 2025 · N688SL · Boeing 757230
  > FLT: N/A (MX INSP) ESI - NO APU BLEED. REMOVED AND REPLACED FLOW SENSING MODULE PER AMM.
- [SDR YENA2025012200094](https://openairdocs.org/sdr/YENA2025012200094.md): Bleed Air Sys · odor · Jan 20, 2025 · N613JB · Airbus A320232
  > FLT#743, JFK-AUA. 'DIRTY SOCK SMELL REPORTED BY FLIGHT ATTENDANT FROM MID TO AFT CABIN ( APU BLEED AIR SUPPLY SYSTEM); REF LP # 4219340, ITEM 2 OR WO # 1387703 TSI. THIS CLEARS THIS MDDR. MDDR CLEARED. MX-4 UPDATED. PLACARD RMVD. MCC NOTIFIED.'
- [SDR AALA202501084835](https://openairdocs.org/sdr/AALA202501084835.md): Apu · odor · Jan 7, 2025 · N887NN · Boeing 737823
  > AIRCRAFT WAS GROUNDED: WHILE DESCENDING THE APU WAS STARTED AND A STRONG BURNING ODOR WAS DETECTED. IT SMELT VERY SIMILARTO BURNING PAPER. UPON NOTICING THE SMELL THE BLEED CONFIGURATION WAS IMMEDIATELY REVERTED TO ITS PREVIOUS SETTINGS AND THE APU WAS SHUT DO
- [SDR YENA2024122701637](https://openairdocs.org/sdr/YENA2024122701637.md): Bleed Air Sys · odor · Dec 24, 2024 · N949JT · Airbus A321231
  > FLT#1269, BOS-FLL. 'ON DESCEND THRU 5000 FEET WE ENCOUNTERED DIRTY SOCK SMELL; ACCOMPLISHED INFO NOTICE 2017-TO15K FOUND CAUSE OF ORDER THE APU BLEED, APU DEFERRED AT LOG PG 4211607. BOTH BURN AND CLEAN NO SMELL AT THIS TIME. A/CO OK FOR SVC. TSM 05-501-00-810
- [SDR ABXA20241211251](https://openairdocs.org/sdr/ABXA20241211251.md): Apu · faulted · Dec 11, 2024 · N371CM · Boeing 767338
  > AFTER DE-ICE APU WOULD NOT PRODUCE ENOUGH AIR FOR START AC RETURNED TO GATE (BTB) AND MTX GROUNDED AC. AND DEFERRED APU IAW MEL ABX-49-11-1A AC REMAINS NO ETOPS. AC WAS RETURNED TO SERVICE.
- [SDR ABXA20241210250](https://openairdocs.org/sdr/ABXA20241210250.md): Apu · faulted · Dec 10, 2024 · N220CY · Boeing 767383
  > APU AIR PRESSURE LOW DURING START (11 PSI)DURING LH ENGINE START HUNG AT 25% N2 ON TAXI OUT. AC RETURNED TO GATE (BTB). MTX GROUNDED AC AND DEFERRED APU IAW MEL ABX-49-11-1A ACCOMPLISHED MPM PLACARD INSTALLED AND AC REMAINS NO ETOPS MBCB 12-20-2024 AC RETURNE
- [SDR CVGA20241212001](https://openairdocs.org/sdr/CVGA20241212001.md): Bleed Air Sys · faulted · Dec 7, 2024 · N512UP · Cessna 560XL
  > JET FUEL SMELL COMING INTO AIRCRAFT FROM THE AIR VENTS. MORE PROMINENT FROM THE OVERHEAD COLD AIR VENTS THAN THE CONDITIONED / HEAT VENTS. NO SMELL PRESENT IN LUGGAGE COMPARMENT OR TAIL CONE ACCESS AREA. NO FUEL NOTED PUDDLING UNDER AIRCRAFT. WAS TROUBLESHOT A
- [SDR YENA2024120201522](https://openairdocs.org/sdr/YENA2024120201522.md): Apu · smoke · Dec 1, 2024 · N949JT · Airbus A321231
  > FLT#255, JFK-PLS. 'LEVEL 1 FUME EVENT SOCK SMELL FROM ROWS 27 AND BACK OCCURRED DURING DESCENT ( APU BLEED AIR SUPPLY SYSTEM).' (SUPPLEMENTAL INFORMATION TO FOLLOW)
- [SDR DALA2024120311390](https://openairdocs.org/sdr/DALA2024120311390.md): abnormal · Nov 30, 2024 · N302NB · Airbus A319114
  > SHIP 3102 INTERMITTANT ODOR DETECTED ON DECENT AND AGAIN ON GROUND FOUND RESIDUAL DE-ICE FLUID BY APU INTAKE. CORRECTIVE ACTION: PERFORMED DECONTAMINTAION OF BLEED DUCTS REF. A319 AMM 36-10. PER MCC, PLACING APU ON MEL 49-10-01A FOR CLEANING. R/R BOTH RECIRC F
- [SDR AALA202411277891](https://openairdocs.org/sdr/AALA202411277891.md): Cooling Fan · leaking · Nov 25, 2024 · N722US · Airbus A319112
  > AIRCRAFT WAS GROUNDED: AFTER APU BLEED AIR ON, DIRTY SOCKS SMELL IN ENTIRE AIRCRAFT DURING CRUISE. NO INJURIES REPORTED. MAINTENANCE FOUND EVIDENCE OF OIL LEAK AT APU COOLING FAN AND REPLACED APU COOLING FAN IAW AMM 49-52-51.
- [SDR YENA2024112501497](https://openairdocs.org/sdr/YENA2024112501497.md): Bleed Air Sys · odor · Nov 23, 2024 · N949JT · Airbus A321231
  > FLT#771, BOS-CUN. 'INBOUND FA'S ALL REPORT A FUME IN THE CABIN UPON LANDING ( APU BLEED AIR SUPPLY SYSTEM).' (SUPPLEMENTAL INFORMATION TO FOLLOW)
- [SDR ABXA20241121230](https://openairdocs.org/sdr/ABXA20241121230.md): Controller · faulted · Nov 21, 2024 · N783AX · Boeing 767281
  > DURING TAXI APU NOT PRODUCING BLEED AIR AC RETURNED TO BLOCK (BTB). MTX GROUNDED AC, RESET AND CLEANED FAULT ON APU CONTROLLER PER AMM 49-67-05 APU OPS CHECK GOOD. BLEED AIR CHECK TESTS GOOD AND RETURNED AC TO SERVICE

Next page: https://openairdocs.org/jasc/4950/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 = '4950'
ORDER BY difficulty_date DESC
```

This list as a web page: https://openairdocs.org/jasc/4950/reports

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