SDR HNAA2025122900866

Service difficulty report · O-Ring · Emb EMB145LR

Difficulty date: December 26, 2025
Submitted: December 29, 2025
Operation: Air carrier
Aircraft: N900AE
Make and model: Emb EMB145LR
Aircraft serial: 14500885
Aircraft time: 45,551 hours, 41,702 cycles
System (JASC): 3610 · Pneumatic Distribution System
Part: O-Ring
Condition: Failed
Location: Bleed Line
Stage of operation: TX
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.

What was found

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.

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