SDR ASAA2019031228586

Service difficulty report · Unknown · Boeing 737890

Difficulty date: March 12, 2019
Submitted: March 13, 2019
Operation: Air carrier
Aircraft: N514AS
Make and model: Boeing 737890
Aircraft serial: 35193
Aircraft time: 39,756 hours, 11,921 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Condition: Malfunctioned
Location: Fmc
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

AT CRUISE WITH FO FLT DIRECTOR AS MASTER L NAV DISCONNECTED V NAV WENT TO SPEED MODE. SINGLE FMC OPERATION SCRATCH PAD MESSAGE DISPLAYED. FO PFD HAD MAP FLAG. COMPLETED QRD FOR SINGLE FMC OPS AFTER I MIN OF BOTH ON LEFT RETURNED FMC SELECT SWITCH TO NORMAL, NORMAL OPS. GROUNDED - YES. PERFORMED BITE TEST ON FMC. FOUND FMC RESYNC MESSAGE CYCLED POWER ON BOTH FMC. LEFT AND RIGHT FMC OPS CHECK GOOD IAW FIM 34-61 TASK 837 AND AMM 34-61-00.