SDR ASAA2016121119009

Service difficulty report · Warning System · Boeing 737990ER

Difficulty date: December 11, 2016
Submitted: December 13, 2016
Operation: Air carrier
Aircraft: N494AS
Make and model: Boeing 737990ER
Aircraft serial: 41729
Aircraft time: 3,364 hours, 1,094 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning System
Condition: False Activation
Location: Cockpit
Stage of operation: CR
How discovered: O
Nature of condition: N
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 370 , FMC AMBER ANNUNCIATOR ILLUMINATED, CWS R ILLUMINATED AND VTK APPEARED ON FO SIDE WAS MASTER PILOT. WHILE ACCOMPLISHING CHECKLIST, ANOMALY RESET TO NORMAL OPS. TOTAL DURATION OF ANOMALY WAS APPROXIMATELY 1 MINUTE. CONTINUED TO DESTINATION WITHOUT FURTHER OCCURRENCE. GROUNDED - YES. PERFORMED FMCS BITE PROCEDURE, REF FIM 34-61 TASK 801. SYSTEM CHECK OK.