# SDR AALA201802209048

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2018
- Submitted: March 9, 2018
- Operation: Air carrier
- Aircraft: [N562UW](https://openairdocs.org/aircraft/N562UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5332
- Aircraft time: 18,002 hours, 7,179 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: O-Ring
- Condition: Leaking
- Location: Oil Cooler
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201802209048

## Discrepancy

STRONG ODOR IN AFT CABIN WHEN PACKS OPERATING ON APU .THE ODOR REOCCURRED ON TAKE OFF THROUGH ABOUT 5000'AGL. APU OFF CABIN ODOR QRH CONDITION A DIRTY SOCKS ODOR REOCCURRED ON DESCENT OUT OF FL.180 WITH THRUST AT IDLE.    THE AIRCRAFT WAS GROUNDED.  FOUND OIL LEAKING FROM THE OIL COOLER TRANSFER TUBES.  REPLACED THE O-RINGS IAW AMM 49-91-44. OPS CHECKED GOOD, AND NO LEAKS NOTED AT THIS TIME.

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