# SDR AALA201810299041

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2018
- Submitted: November 5, 2018
- Operation: Air carrier
- Aircraft: [N922US](https://openairdocs.org/aircraft/N922US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6537
- Aircraft time: 12,800 hours, 4,931 cycles
- System (JASC): [4940 · APU Start/Ignition System](https://openairdocs.org/jasc/4940)
- Part: O-Ring
- Condition: Leaking
- Location: Apu Starter
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201810299041

## Discrepancy

AFTER TAKEOFF,  THE FLIGHT ATTENDANTS REPORTED A BAD MUSTY - MILDEW ODOR THROUGHOUT THE AIRCRAFT.  DISSIPATED AS AIRCRAFT MADE IT TO ALTITUDE. THEN AGAIN DURING DESCENT.  THE AIRCRAFT WAS GROUNDED.   REPLACED THE STARTER AND CLUTCH SEALS AND O-RINGS IAW AMM 49-42-55.

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