SDR ASAA2015010410146

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: January 4, 2015
Submitted: January 6, 2015
Operation: Air carrier
Aircraft: N419AS
Make and model: Boeing 737990ER
Aircraft serial: 41734
Aircraft time: 6,918 hours, 2,213 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: O
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, LT FMC FAILED. CHECK LIST COMPLETED. FMC SWITCH PLACED TO BOTH ON RT NORMAL, OPS RESTORED ON SINGLE FMC. ACFT GROUNDED. NO HISTORY LAST 30 DAYS. PERFORMED FIM 34-61 TASK 836 & NORMAL OPS RESTORED, DUAL FMC. GROUND FUNCTIONAL TESTS PASSED IAW SAME.