SDR ASAA2017041220444

Service difficulty report · Fmc · Boeing 737890

Difficulty date: April 12, 2017
Submitted: April 14, 2017
Operation: Air carrier
Aircraft: N529AS
Make and model: Boeing 737890
Aircraft serial: 35198
Aircraft time: 27,387 hours, 8,185 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

MAP CAUTION DISPLAYED ON F/O'S INBOARD DU ALONG WITH NO VSPD AND LND ALT TO OUTBORD DISPLAY. NOTHING IN FMC SCRATCH PAD. ACFT GROUNDED. VERIFIED FAULT, CYCLED FMC SWITCH TO BOTH ON LT AND BACK TO RIGHT THEN TO NORMAL. BOTH FMC ARE WORKING NORMAL. ACCOMPLISHED FMC BITE, ALL OK, IAW FIM 34--61 TASK 801. FOUND FMC PGM FAULT IAW FIM 34-61 TASK 807.