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SDR AALA202509259393

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Service difficulty report · Air Filter · Boeing 737823

FAA SDR system

Difficulty date
September 23, 2025
Submitted
September 25, 2025
Operation
Air carrier
Aircraft
N969AN
Make and model
Boeing 737823
Aircraft serial
29546
Aircraft time
67,737 hours, 28,592 cycles
System (JASC)
2120 · Air Distribution System
Part
Air Filter
Condition
Contaminated
Location
Zone 100
Stage of operation
TO
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

AIRCRAFT WAS NOT GROUNDED: FLIGHT ATTENDANT REPORTED STRONG ODOR ON TAKEOFF AND ON CLIMB OUT THAT SMELLED LIKE DIRTY SOCK. GOT BETTER IN CRUISE AND WORSE ON DESCENT. FOUND LEAKING GREY WATER HOSE ABOVE LEFT HAND RECIRCULATING FAN FILTER. REMOVE AND REPLACED HOSE (AALA202509256714), LEFT HAND RECIRCULATING FAN FILTER (AALA202509259393), AND INSULATION (AALA202509257830) UNDERNEATH. CLEANED AREA (AALA202509257742) AND RECIRCULATING FAN, PER AMM 21-25-01, AFMM 20-12-12. ACCOMPLISHED SOF TROUBLESHOOTING CARD 08L00021001. CONFIRMED NO SOF AFTER WORK ACCOMPLISHMENT.