# SDR AALA202111106233

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2021
- Submitted: November 10, 2021
- Operation: Air carrier
- Aircraft: [N553UW](https://openairdocs.org/aircraft/N553UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4960
- Aircraft time: 31,668 hours, 11,959 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Apu
- Part number: 38007081
- Part serial: P3351
- Condition: Leaking
- Location: Zone 100
- Part time: 34,783 hours, 21,917 cycles
- Stage of operation: CL
- 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/AALA202111106233

## Discrepancy

AIRCRAFT WAS GROUNDED: FUMES REPORTED IN AFT CABIN DURING INITIAL CLIMB.  MAINTENANCE HAS ISOLATED THE SOURCE OF THE ODOR  TO THE APU.    REPLACED APU  AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK.

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