SDR ASAA2016022315641

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: February 23, 2016
Submitted: February 25, 2016
Operation: Air carrier
Aircraft: N468AS
Make and model: Boeing 737990ER
Aircraft serial: 41735
Aircraft time: 6,516 hours, 2,143 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
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

LEFT FMC FAILED INTERMITENTLY 4 TIMES. SWITCHED TO, BOTH ON R". SEEMED TO HAPPEN DURING CRUISE WINDS REQUEST. ACFT GROUNDED. ACCOMPLISHED FMC BITE REF FIM 34-61, TASK 801. FOUND, PGM FAULT, ON LT COMPUTER WITH, PRESSURE POSITION LAT, LAST LEG AND 2 OTHER ACARS FAULTS ON RT COMPUTER LAST LEG. ACFT GOOD FOR CONTINUED OPERATION REF FIM 34-61.