# SDR AALA201703289024

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 24, 2017
- Submitted: March 28, 2017
- Operation: Air carrier
- Aircraft: [N543UW](https://openairdocs.org/aircraft/N543UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4843
- Aircraft time: 18,474 hours, 7,480 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Plug
- Condition: Leaking
- Location: Apu
- Stage of operation: CR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201703289024

## Discrepancy

AIRCRAFT WAS GROUNDED. FA REPORTED MUSTY ODOR MID CABIN AFT. TURNED OFF PACK 2 AND ODOR SUBSIDED. TURNED PACK 2 BACK ON  AND ODOR RETURNED AND CREW TURNED PACK 2 OFF FOR REMAINDER OF FLIGHT. MAINTENANCE FOUND THE APU MAGNETIC DRAIN PLUG LEAKING AND REPLACED IT PER AMM 49-91-42.

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