SDR ASAA2019102853126

Service difficulty report · Fmc · Boeing 737890

Difficulty date: October 25, 2019
Submitted: October 28, 2019
Operation: Air carrier
Aircraft: N533AS
Make and model: Boeing 737890
Aircraft serial: 35201
Aircraft time: 34,539 hours, 10,041 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
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

DURING CRUISE AT FL360, ENCOUNTERED A SINGLE FMC FAILURE. "SINGLE FMC OPERATION" IN THE SCRATCHPAD, ACCOMPANIED BY "VTK" ON THE FIRST OFFICERS NAVIGATION DISPLAY AND FOLLOWED BY A "MAP" FLAG. RAN QRH AND CONTINUED FO RHTE REMAINDER OF THE FLIGHT WITH FMC SOURCE SELECTOR BOTH ON L. GROUNDED - YES. RETURNED FMC SELECTOR SWITCH TO NORMAL . PERFORMED LEFT AND RIGHT FMC BITE CHECK REF B737-800 FIM 34-61 TASK 801 OPS CHECK NORMAL.