SDR UALA2011093005300

Service difficulty report · Module · Boeing 777222

Difficulty date: September 30, 2011
Submitted: October 13, 2011
Operation: Air carrier
Aircraft: N798UA
Make and model: Boeing 777222
Aircraft serial: 26928
Aircraft time: 60,308 hours, 8,755 cycles
Engine: Pwa PW40903
System (JASC): 3140 · Central Computers
Part: Module
Part number: S243W0011401
Part serial: 97111097
Condition: Failed
Location: Left
Stage of operation: NR
How discovered: 9
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

FAILURE OF ALTITUDE CALLOUTS (MODE 6) FUNCTION. ADVISORY REF SAME FLT 5 CMC MESSAGES, CHECKED MAT SHOW ACTIVE PER FIM 34-46 TASK 803, RESET CB, MAT GPWS SYS TEST FAILED, REPLACED CPM-GG (M010) L AIMS, IAW MM. TEST PASSED. ALL MESSAGES CLEARED.