Service difficulty report · Computer · Boeing 767322

Difficulty date
December 27, 2022
Submitted
December 28, 2022
Operation
Air carrier
Aircraft
N654UA
Make and model
Boeing 767322
Aircraft serial
25392
Aircraft time
117,550 hours, 18,386 cycles
Part
Computer
Part number
8221261102
Part serial
2205
Condition
Faulted
Location
Autopilot
Stage of operation
CL
How discovered
O
Nature of condition
F, J
Precautionary procedure
A

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

What was found

C-AUTOPILOT IN LNAV OR HDG SELECT WOULD NOT BANK PAST 15 DEGREES . LOC/ILS BANKED NORMAL. SERVO FAULT ( DEAD TRIM L), UNSCHEDULED TRIM L. T/S PER FIM 22-02 TASK 801. MCDP BITE HAS FLIGHT FAULT HISTORY LAST LEG MESSAGE 110270 AND 130290, A/P CTN STAB L/FCC AND A/P STAB C FCC, AND NO AUTO LAND STAB L/ FCC C. MSG 027 UNSCHEDULED TRIM L, MSG 029 COMMAND RESPONSE MONITOR FINDS A LEFT STAB TRIM. ADD FAULT: 130290 110290 110270 FIM AUTOFLIGHT BITE FIM -S MESSAGE FIGURE 113 SHEET 3 DIRECT TO CAT. MCDP GROUND 65 -STAB TRIM TEST. PEROMED TEST WITHOUT FAULT. ROTABLE PARTS CHANGE WAS INDICATED - TT # 1844684 SN OFF 2205 REMOVED AND REPLACED CENTER FCC FOR AS CAUTION PER AMM 22-11-01. PERORMED TEST 30 MCDP GROUND TEST PER 22-11-01/401. AC IS FULL COMPUTER, FLIGH OFF 76-2210-9-0001 2205 ON 76-2210-9-0001 572