SDR SWAA2025110531910

Service difficulty report · Coalescer Bag · Boeing 73779P

Difficulty date: November 4, 2025
Submitted: November 5, 2025
Operation: Air carrier
Aircraft: N7862A
Make and model: Boeing 73779P
Aircraft serial: 33009
Aircraft time: 60,375 hours, 40,066 cycles
System (JASC): 2170 · Humidity Control System
Part: Coalescer Bag
Condition: Odor
Location: Zone 100
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

ON TAXI IN, STARTED APU, TURNED ON APU AIR. SMELLED SMOKE, TURNED OFF APU AIR AND APU. TURNED OFF RECIRCULATION FAN ODOR CLEARED. SMOKE ODOR IN ENTIRE CABIN, FWD AND AFT. C/W INSPECTION 05-51-56-0200-801 COULD NOT DUPLICATE. REPLACED COALESCER BAGS NR 1 & 2, PACKS IAW AMM 21-51-05. OPS CHECK GOOD.

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