SDR UALA2011101005435

Service difficulty report · Fan · Boeing 777222

Difficulty date: October 7, 2011
Submitted: October 10, 2011
Operation: Air carrier
Aircraft: N794UA
Make and model: Boeing 777222
Aircraft serial: 26953
Aircraft time: 62,157 hours, 8,897 cycles
Engine: Pwa PW40903
System (JASC): 2121 · Air Distribution Fan
Part: Fan
Condition: Malfunctioned
Location: Cabin
Stage of operation: CR
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

CREW REPORT ELECTRICAL ODOR IN CABIN FRONT & BACK OF BUSINESS CLASS. RECIRC FAN STATUS MSG DISPLAYED CREW SET BOTH UPPER AND LOWER RECIRC FANS TO OFF AND ODOR DISSIPATED. BOEING AHM PROGRAM HAS DETECTED FAULT MSG 21-24700 LOWER RECIRC FAN RIGHT MOTOR DOES NOT FOLLOW COMMAND OR IS OVERHEATED. FOUND CB FOR LWR RT RECIRC FAN POPPED. CHECKED FAN AREA AND ALL OK. DEACTIVATED PER MEL. CREW CONFIRMED NO FURTHER ODOR AFTER FANS TURNED OFF. :DF761 COVERS.