SDR ASAA11510760

Service difficulty report · Fmc · Boeing 737890

Difficulty date: December 6, 2011
Submitted: December 9, 2011
Operation: Air carrier
Aircraft: N564AS
Make and model: Boeing 737890
Aircraft serial: 35103
Aircraft time: 19,645 hours, 6,196 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Nr 2
Stage of operation: AP
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

WHILE FLYING AN RTA ARRIVAL OVER OLM FMCS DISAGREED WITH EACH OTHER BY 2 MINUTES. THE RTA WAS 2336Z FMC 1 SHOWED 2336Z FMC2 SHOWED 2328Z. FMC 2 ALSO SHOWED DIFFERENT SPEED AND DESCENT POINT ONCE FMC 2 POINT WAS REACHED IT THEN STAVED TO FMC 1 INFORMATION. VERIFIED FMC DUAL OPS RESTORED.