# SDR AALA202111309890

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 19, 2021
- Submitted: November 30, 2021
- Operation: Air carrier
- Aircraft: [N9013A](https://openairdocs.org/aircraft/N9013A), registered now
- Make and model: Airbus A319-115
- Registry model: [Airbus A319-115](https://openairdocs.org/model/airbus-a319-115) (OpenAirDocs)
- Aircraft serial: 5827
- Aircraft time: 21,943 hours, 10,430 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Cooling Fan
- Condition: Leaking
- Location: Zone 100 - Fuse
- Stage of operation: AP
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202111309890

## Discrepancy

AIRCRAFT WAS GROUNDED: ON FINAL APPROACH AIRCRAFT ENCOUNTER HEAVY RAIN AND CREW NOTED CABIN SMELLY SOCK, ACRID ODOR WITH HAZE IN CABIN. MAINTENANCE: ISOLATED SOURCE OF THE ODOR AS THE APU.  MAINTENANCE FOUND THE APU OIL COOLING FAN O-RING LEAKING AND REPLACED IT PER AMM 49-52-51. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.

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