Service difficulty report · Fmc · Boeing 747422

Difficulty date
June 1, 2007
Submitted
June 6, 2007
Operation
Air carrier
Aircraft
N116UA
Make and model
Boeing 747422
Aircraft serial
26908
Aircraft time
34,526 hours, 4,169 cycles
Engine
Pwa PW4056
Part
Fmc
Condition
Malfunctioned
Stage of operation
AP
How discovered
O
Nature of condition
O
Precautionary procedure
O

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

What was found

DURING COUPLED APPROACH 15 MILES OUT FOUND A-C LINED UP ON 25L NOT 25R AS LOADED. ARRIVAL PAGE WAS BLANK RIGHT FMC THEN LEFT FROZE THEN DUMPED. NO EICAS WARNINGS. LANDED USING RAW DATA. [07-27-07] ACCOMPLISHED TROUBLESHOOTING. IDENTIFIED FLIGHT MANAGEMENT COMPUTER PROBLEM. REPLACED FMC. SYSTEM TESTED NORMALLY.