SDR ASAA2014010412312

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: January 4, 2014
Submitted: January 6, 2014
Operation: Air carrier
Aircraft: N442AS
Make and model: Boeing 737990ER
Aircraft serial: 43293
Aircraft time: 345 hours, 105 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

LEFT FMC FAILED, ACFT GROUNDED. APPLIED POWER ALIGNED IRU SELECTED REPOSITION NAV SWITCH FROM BOTH RT TO NORMAL. BOTH FMC CDU NORMAL BOTH IRUS ALIGNED NORMAL ACCOMPLISHED FMC BITE IAW FIM 34-61, TASK 801, NO FAULTS NOTED, COULD NOT DUPLICATE DISCREPANCY NO PRIOR HISTORY 30 DAYS.