Service difficulty report · Fmc · Boeing 737990ER

Difficulty date
January 4, 2023
Submitted
January 5, 2023
Operation
Air carrier
Aircraft
N428AS
Make and model
Boeing 737990ER
Aircraft serial
36353
Aircraft time
24,923 hours, 7,799 cycles
Part
Fmc
Part number
UNKNOWN
Condition
Intermittent
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 BOTH FMC'S RESET FOLLOWED BY AN FMC DISAGREE MESSAGE ON CA MCDU MINUTES LATER AND EXTINGUISHED SHORTLY AFTER. GROUNDED - YES. NO HISTORY- COULD NOT DUPLICATE. PERFORMED B737-900 FIM 34-61 TASK 835 FMC'S NORMAL GRN VERIFICATION GOOD.