# SDR AALA202306133454

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 30, 2023
- Submitted: June 13, 2023
- Operation: Air carrier
- Aircraft: [N198UW](https://openairdocs.org/aircraft/N198UW), registered now
- Make and model: Airbus A320*
- Aircraft serial: 5444
- Aircraft time: 33,080 hours, 13,360 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 38007081
- Part serial: P3357
- Condition: Odor
- Location: Zone 100 - Fuse
- Part time: 43,276 hours, 23,703 cycles
- 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/AALA202306133454

## Discrepancy

AIRCRAFT WAS GROUNDED: DESCENDING THROUGH ABOUT 15,000 FEET, A DIRTY MUST SOCK SMELL WAS NOTED. MAINTENANCE ISOLATED THE SOURCE OF THE ODOR TO THE APU . **SUPPLEMENTAL REPORT FOR AALA202305023454: MAINTENANCE ACCOMPLISHED ENHANCED DECONTAMINTION OF THE ENVIRONMENTAL CONTROL SYSTEM PER TASK CARD 26L00021014 AND A  SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ISSUES NOTED. ** (CLOSED)

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