SDR ASAA2017093022087

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: September 30, 2017
Submitted: October 2, 2017
Operation: Air carrier
Aircraft: N471AS
Make and model: Boeing 737990ER
Aircraft serial: 41703
Aircraft time: 12,049 hours, 3,997 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
Stage of operation: CR
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

DURING CRUISE, FMC FAILED. ACFT GROUNDED. ACCOMPLISHED FMC BITE IAW FIM 34-61, TASK 801. LT FMC FAILED IN SENSORS PAGE WITH NO GREEN VALID ON FRONT OF FMC AND NO FMC PROMPT ON MCDU. LEFT WOULD NOT GO INTO BITE. ACCOMPLISHED FIM 34-61, TASK 807, FMC HARDWARE/SOFTWARE, RESET LEFT FMC, SYSTEM RESET, OPS CHECKED NORMAL. ALL GROUND TESTS PASSED.