SDR CALA2025073107182

Service difficulty report · Filter · Boeing 777222

Difficulty date: July 31, 2025
Submitted: August 1, 2025
Operation: Air carrier
Aircraft: N229UA
Make and model: Boeing 777222
Aircraft serial: 30557
Aircraft time: 92,371 hours, 10,824 cycles
System (JASC): 2120 · Air Distribution System
Part: Filter
Condition: Unknown
Location: Zone 100
Stage of operation: IN
How discovered: V
Nature of condition: O
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CARRY OUT GVI OF UPPER RECIRCULATION FAN AND ITS AIR FILTER FOR ANY SIGNS OF DAMAGE OR UNUSUAL SMELL. GVI OF UPPER RECIRCULATION FAN CARRIED OUT WHILE FAN IS OPERATING. NO ELECTRICAL OR UNUSUAL SMELLS NOTED. RECIRCULATION FAN OPERATES SATISFACTORY. FWD UPPER RECIRCULATION FAN OPERATES SATISFACTORY. AS PRECAUTIONARY, REPLACED UPPER FORWARD RECIRCULATION AIR FILTERS IAW AMM 21-25-02-000-801, OPS CHECK SATISFACTORY.