What was found
AIRCRAFT WAS GROUNDED: STRONG MUSTY ODOR IN FLIGHT DECK AND AFT CABIN DURING DESCENT. REMOVE AND REPLACED RECIRCULATION FAN HEPA LEFT FILTER (AALA202604219046) AND RIGHT FILTER (AALA202604292313). PER JC08C12221001.
- Difficulty date
- April 17, 2026
- Submitted
- April 22, 2026
- Operation
- Air carrier
- Aircraft
- N969AN
- Make and model
- Boeing 737823
- Aircraft serial
- 29546
- Aircraft time
- 69,352 hours, 29,362 cycles
- System (JASC)
- 2120 · Air Distribution System
- Part
- Air Filter
- Part number
- P199753
- Condition
- Contaminated
- Location
- Zone 100
- 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.