Service difficulty report · Unknown · Boeing 737990ER

Difficulty date
August 26, 2023
Submitted
August 28, 2023
Operation
Air carrier
Aircraft
N492AS
Make and model
Boeing 737990ER
Aircraft serial
44110
Aircraft time
28,517 hours, 8,940 cycles
Part
Unknown
Part number
UNKNOWN
Condition
Unknown
Location
Unknown
Stage of operation
TX
How discovered
V
Nature of condition
J
Precautionary procedure
K

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

What was found

AFTER LANDING LEFT FMC FAILED AND RECOVERED MULTIPLE TIMES. GROUNDED - YES. PERFORMED FMC BITE PROCEDURE FOUND FAULT FMC-L PGM FAULT AS PER FIM 34-61 TASK 801, PERFORMED FIM FMC HARDWARE/SOFTWARE FAULTS-FAULT ISOLATION, OPENED C/B A6 AT P18-2 (FMCS CMPTR-1) AND THEN CLOSED (WAITED 10 SECONDS) AFTER SYSTEM RESET VERIFIED FMC PROMPT IS SHOWN ON THE MENU, THEN THERE WAS AN INTERMITTENT FAULT AS PER FIM 34-61 TASK 807.