SDR ASAA2018013023333

Service difficulty report · Fmc · Boeing 737890

Difficulty date: January 30, 2018
Submitted: January 31, 2018
Operation: Air carrier
Aircraft: N518AS
Make and model: Boeing 737890
Aircraft serial: 35693
Aircraft time: 34,498 hours, 10,302 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: LD
How discovered: O
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

AFTER LANDING, ALL FMC DATA DISAPPEARED, THE AMBER FMC P/RST SWITCH LIGHT ILLUMINATED AND BOTH CDUS BLANKED,THEN RETURNED TO THE MENU PAGE BUT NO FMC WAS DISPLAYED. AFTER ABOUT 30 SECONDS FMC REAPPEARED ON BOTH CDUS AND BOTH FMCS SEEMED TO REBOOT, ALL DATA WAS LOST. ACFT GROUNDED. PERFORMED FIM 34-61 TASK 836 AND DUAL FMC RESTORED, GROUND FUNCTIONAL CHECKED GOOD, NO HISTORY OF FAULT LAST 30 DAYS.