MOMENTARY MUSTY/MOLDY ODOR WHEN SWITCHING FROM ENG BLEED TO APU BLEED WITH PACKS RUNNING. CURRENT CREW DESCRIBED SMELL AS MUSTY/MOLDY. PREV CREW DESCRIBED IT AS A FUEL SMELL. INSPECTED APU BLEED VALVE, FOUND BAD O-RINGS ON BLEED LINE. R & R O-RINGS IAW AMM 36-12-03. RAN PACKS OFF APU BLEED, NO SMELLS NOTED. OK FOR SERVICE.
| Incident date | December 26, 2025 |
|---|---|
| Airline | HNAA |
| Flight | AMM36 |
| Aircraft | EMB EMB145LR |
| Registration | N900AE |
| Affected area | Engine |
| Event type | Fumes or Odor |
| Verification | Official |
Sources
- FAA SDR: HNAA fumes or odor report on 2025-12-26 (external.apic4e.faa.gov)
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