What was found
AIRCRAFT WAS GROUNDED: SLIGHT DIRTY SOCK ODOR NOTICED DURING TAXI OUT. ODOR DISSIPATED ENROUTE, HOWEVER RETURNED DURING THE DESCENT. VERY STRONG ODOR IN DESCENT CAUSING IRRITATION. MAINTENANCE FOUNDAPU COOLING FAN ASSEMBLY LEAKING OIL
- Difficulty date
- October 1, 2025
- Submitted
- October 2, 2025
- Operation
- Air carrier
- Aircraft
- N587UW
- Make and model
- Airbus A321231
- Aircraft serial
- 6236
- Aircraft time
- 35,453 hours, 14,699 cycles
- System (JASC)
- 4990 · APU Oil System
- Part
- Cooling Fan
- Part serial
- 1960
- Condition
- Leaking
- Location
- Apu
- Part time
- 24,186 hours, 10,560 cycles
- Component
- Apu · Hnywl · 1319A
- Component part number
- 38007081
- Stage of operation
- DE
- How discovered
- O
- Nature of condition
- B
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.