SDR ASAA2013101896200

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: October 18, 2013
Submitted: October 21, 2013
Operation: Air carrier
Aircraft: N413AS
Make and model: Boeing 737990ER
Aircraft serial: 35205
Aircraft time: 2,365 hours, 730 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Light
Condition: False Activation
Location: Fmc
Stage of operation: CR
How discovered: O
Nature of condition: N
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, EXPERIENCED A LEFT FMC FAILURE AS INDICATED BY FMC PUSH RESET LIGHT, VTK FLAG ON CAPT NAV DISPLAY AND BOTH CDUS GOING BLANK. FOR AN APPROX 1 MIN PERIOD, FMC CAME BACK BY ITSELF AND ALL SYSTEMS RETURNED TO NORMAL WITH NO PILOT ACTION BEFORE FMC CHECKLIST WAS COMPLETED. ACFT GROUNDED. ACCOMPLISHED MM 34-61, TASK 801. PASSES ALL TESTS. LT FMC OPS CHECKED GOOD, NO HISTORY 30 DAYS.