What was found
ACRID ODOR IN CABIN OF ELECTRICAL OVERHEATING. CMC MESSAGE SHOWS UPPER AND LOWER LEFT RECIRCULATION FAN FAILED. SUPPLEMENTAL DATA UPDATE THE LOWER LEFT RECIRCULATION FAN MOTOR BEARINGS FAILED . THE MOTOR WAS REPLACED.
- Difficulty date
- December 10, 2002
- Submitted
- December 31, 2002
- Operation
- Air carrier
- Aircraft
- N176UA
- Make and model
- Boeing 747422
- Aircraft serial
- 24383
- Aircraft time
- 47,862 hours, 5,306 cycles
- Engine
- Pwa PW4056
- System (JASC)
- 2121 · Air Distribution Fan
- Part
- Bearing
- Condition
- Failed
- Location
- Recirc Fan
- Component
- Motor · MR21271
- Stage of operation
- CR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.