# SDR AALA202203249473

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2022
- Submitted: March 24, 2022
- Operation: Air carrier
- Aircraft: [N122US](https://openairdocs.org/aircraft/N122US), registered now
- Make and model: Airbus A300*
- Aircraft serial: 1298
- Aircraft time: 62,525 hours, 30,834 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: O-Ring
- Condition: Leaking
- Location: Zone 100 - Fuse
- Component: Apu, Honeywell, 1919A
- Component part number: 38007081
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202203249473

## Discrepancy

AIRCRAFT WAS GROUNDED: MUSTY ODOR- DIRTY SOCK SMELL DURING DESCENT WITH HP BLEED VALVES OPEN. ODOR DISSIPATES WHEN POWER IS INCREASED. REPLACED 4 EACH O-RINGS ON APU TRANSFER TUBES TO APU OIL COOLER PER AMM 49-91-44. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.

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