Service difficulty report · Unknown · Boeing 777222

Difficulty date
November 7, 2012
Submitted
November 9, 2012
Operation
Air carrier
Aircraft
N778UA
Make and model
Boeing 777222
Aircraft serial
26940
Aircraft time
67,294 hours, 11,835 cycles
Engine
Pwa PW4077
Part
Unknown
Condition
Malfunctioned
Location
Cockpit
Stage of operation
NR
How discovered
O
Nature of condition
G
Precautionary procedure
O

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

What was found

SATCOM SYSTEM FAILS OR NO BUS ACTIVITY. STATUS MSG01- ACTIVE CRUISE INTERMITTENT; RADIO FREQUENCY UNIT (LEFT) HAS AN INTERNAL FAULT. DB- SATELLITE DATA UNIT (LEFT) MSG02- NOT ACTIVE CRUISE INTERMITTENT; SATELLITE DATA UNIT (LEFT) HAS AN INTERNAL FAULT ON COMMUNICATION CHANNEL 1. DB- SATELLITE DATA UNIT (LEFT) MSG03- NOT ACTIVE CRUISE INTERMITTENT; SATELLITE DATA UNIT (LEFT) HAS NO OUTPUT ON DATA TO CMU BUS (429). DB- LEFT AIMSMSG-2360031 ACTIVE ER INTER MSG-2360541 INACTV ER INTER MSG-2368893 INACTV ER INTER-. (SEE LOG 2)