# SDR AALA202308047690

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2023
- Submitted: August 4, 2023
- Operation: Air carrier
- Aircraft: [N916US](https://openairdocs.org/aircraft/N916US), registered now
- Make and model: Airbus A320*
- Aircraft serial: 6420
- Aircraft time: 27,905 hours, 11,222 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 38007081
- Part serial: P3043
- Condition: Odor
- Location: Zone 100 - Fuse
- Part time: 48,899 hours, 22,739 cycles
- Stage of operation: CR
- 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/AALA202308047690

## Discrepancy

AIRCRAFT WAS GROUNDED: BRIEFLY DURING CRUISE, A SWEATY SOCK SMELL WAS EXPERIENCED AROUND 2L. SMELL RETURNED AT ENGINE SHUTDOWN, STRONGER THIS TIME. MAINTENANCE HAS ISOLATED THE SOURCE OF THE ODOR TO THE APU DUE TO EVIDENCE OF OIL LEAKS BEING FOUND **SUPPLEMENTAL REPORT FOR AALA202308037690:  MAINTENANCE CLEANED THE APU COMPARTMENT AND ACCOMPLISHED A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM. ** (CLOSED)

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