AIRCRAFT WAS GROUNDED: STRONG ODOR OF MUSTY SOCKS ON TAKEOFF THAT DISSIPATED BUT STILL LINGERED DURING FLIGHT. MAINTENANCE FOUND THE APU OIL PUMP FILTER DIFFERENTIAL PRESSURE SWITCH LEAKING AND REPLACED IT PER AMM 49-91-14. A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WAS ACCOMPLISHED PER TASK CARD 26L00021014. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.
| Incident date | February 4, 2025 |
|---|---|
| Airline | AALA |
| Flight | AMM49 |
| Aircraft | AIRBUS A321231 |
| Registration | N900UW |
| Affected area | Engine |
| Event type | Fumes or Odor |
| Verification | Official |
Sources
- FAA SDR: AALA fumes or odor report on 2025-02-04 (external.apic4e.faa.gov)
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