Service difficulty report · Control Unit · Boeing 777224

Difficulty date
April 21, 2023
Submitted
April 21, 2023
Operation
Air carrier
Aircraft
N78003
Make and model
Boeing 777224
Aircraft serial
27579
Aircraft time
112,434 hours, 11,665 cycles
Part
Control Unit
Part number
4885501001
Part serial
0758
Condition
Warning Message
Location
L2
Part time
112,431 hours, 11,662 cycles
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
B

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

What was found

FLIGHT CONTROL SYS EICAS STATUS ANY CONDITION OF THE FLIGHT CONTROL SYSTEM OR IT''S SYSTEM INTERF ACES WHICH WOULD PREVENT DISPATCH. FLIGHT CONTROLS SYSTEM BELOW MINIMUM DISPATCH REQUIREMENTS. FIM TASK REF : FIM TASK REFERENCE NOT FOUND CMC MSG# 2711510 FLIGHT STATUS: L INTERMITTENCE CODE: H PH: CRUISE NARRATIVE: PRIMARY FLIGHT COMPUTER (LEFT) CMC MSG# 2710510 FLIGHT STATUS: L INTERMITTENCE CODE: M PH: CRUISE NARRATIVE: PRIMARY FLIGHT COMPUTER (RIGHT) REPLACED L2 ACE UNIT REF AMM 27-02-02. ALL GROUND TEST PASSED. ALSO REPLACED #11 SPOILER EHSV (SOLONIOD VALVE) ALL OPS & LEAK CKS GOOD. REF AMM 27-61-14. ALL STATUS & MX MSG CLEARED ROTABLE PARTS CHANGE WAS INDICATED - TT # 1461588 SN OFF 0758 UNIT, ACTUATOR OFF 27-2700-9-0005 0758 ON 27-2700-9-0005 2793