# SDR AALA202202073875

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2022
- Submitted: February 7, 2022
- Operation: Air carrier
- Aircraft: [N141NN](https://openairdocs.org/aircraft/N141NN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6656
- Aircraft time: 20,032 hours, 7,585 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Packing
- Condition: Leaking
- Location: Apu
- Component: Apu, Hnywl
- Component part number: 38007081
- Stage of operation: TX
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202202073875

## Discrepancy

AIRCRAFT WAS GROUNDED: THERE WAS A DIRTY SOCK SMELL {MILD} IN CABIN DURING PRE-FLIGHT AND THEN IN CABIN AND FLIGHT DECK AFTER ENGINE START . SMELL DISSIPATED  SLOWLY DURING THE FLIGHT . BUT NEVER WENT AWAY COMPLETELY . ON DECENT WITH POWER PULLED BACK THE SMELL CAME BACK QUITE STRONG AND THEN DISSIPATED AGAIN AFTER LANDING /SHUTDOWN. FOUND OIL LEAKING FROM OIL COOLER TRANSFER TUBES AND REMOVED ANDREPLACED PACKINGS PER AMM 49-91-44.

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