# SDR AALA202501194853

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2025
- Submitted: January 19, 2025
- Operation: Air carrier
- Aircraft: [N775AN](https://openairdocs.org/aircraft/N775AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29584
- Aircraft time: 99,000 hours, 12,349 cycles
- System (JASC): [2121 · Air Distribution Fan](https://openairdocs.org/jasc/2121)
- Part: Cooling Fan
- Part number: 4100945B
- Condition: Failed
- Location: Zone 100
- Stage of operation: DE
- 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/AALA202501194853

## Discrepancy

AIRCRAFT WAS GROUNDED: DESCENDING THROUGH 10,000 FEET, STRONG MUSTY, DIRTY SOCK FUMES FILLED THE CABIN. COMPLIED WITH SMOKE/FUMES QRH CHECKLIST AND FUMES LESSEND BUT DID NOT COMPLETELY STOP.  MAINTINANCE FOUND IFE COOLING FAN AT FAULT AND REPLACED.

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