SDR ASAA2017053020925

Service difficulty report · Fmc · Boeing 737890

Difficulty date: May 30, 2017
Submitted: June 1, 2017
Operation: Air carrier
Aircraft: N566AS
Make and model: Boeing 737890
Aircraft serial: 35182
Aircraft time: 39,768 hours, 11,924 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: NR
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

INTERMITTENT FMC ON BOTH SIDES, COULDN'T INPUT IRS POSITION, LOCKED UP. CHANGED A/C POWER SOURCE DIDN'T WORK. VTK ON CAPTAIN`S SIDE, PUT FMC SWITCH BOTH ON RIGHT WERE ABLE TO INPUT CPS POSITION, ROUTE UPLINE. WENT BACK TO FMC TO BOTH AND COPILOT SIDE HAS MAP, NO VSPD AMBER WARNING FLAGS. ACFT GROUNDED. RESET POWER TO BOTH FMC. OPS CHECKED NORMAL IAW FIM 34-61, TASK 836.