SDR ASAA2015121914329

Service difficulty report · Fmc · Boeing 737890

Difficulty date: December 19, 2015
Submitted: December 22, 2015
Operation: Air carrier
Aircraft: N592AS
Make and model: Boeing 737890
Aircraft serial: 35190
Aircraft time: 30,622 hours, 9,449 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: Both
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

FMC FAIL BOTH SIDES, VTK & MAP FLAGS DISPLAYED BOTH SIDES. BEFORE ACCOMPLISHING CHECKLIST, FMS RESTORED BOTH SIDES, ALL FLAGS & LIGHTS EXTINGUISHED WITHOUT ANY PILOT INPUT. ROUTE DATA DIDN'T DUMP. ACFT GROUNDED. RESET FMC 1 & 2 AND PERFORMED GROUND FUNCTIONAL TEST IAW FIM 34-61, TASK 801, GROUND FUNCTIONAL TEST GOOD.