Service difficulty report · Fmc · Boeing 737990ER

Difficulty date
July 3, 2021
Submitted
July 7, 2021
Operation
Air carrier
Aircraft
N431AS
Make and model
Boeing 737990ER
Aircraft serial
43255
Aircraft time
28,484 hours, 9,172 cycles
Part
Fmc
Condition
Failed
Stage of operation
LD
How discovered
O
Nature of condition
J
Precautionary procedure
O

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

What was found

AFTER LANDING CAPT'S AND F/O'S FMC'S FAILED. REMAINED OFF LINE FOR:25-45 SECONDS. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 801 AND FOUND PGM FAULT IN LEFT AND RIGHT FMC. PERFORMED FIM 34-61 TASK 807 AND BOTH FMCS OPS TEST GOOD.