SDR ASAA2015062812255

Service difficulty report · Warning Light · Boeing 737990ER

Difficulty date: June 28, 2015
Submitted: June 30, 2015
Operation: Air carrier
Aircraft: N442AS
Make and model: Boeing 737990ER
Aircraft serial: 43293
Aircraft time: 6,315 hours, 2,030 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Light
Condition: False Activation
Stage of operation: DE
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 DESCENT, VTK APPEARED ON CAPT NAV DISPLAY FOLLOWED BY LOSS OF BOTH FMC'S. AFTER A VERY SHORT TIME ALL DISPLAYS RETURNED TO NORMAL AND REMAINED NORMAL FOR THE DURATION OF THE FLIGHT. ACFT GROUNDED. UPON CREW DEBRIEF F/O DID NOT LOSE ANY DATA ON DISPLAYS. NO HISTORY. PERFORMED FIM TASK 34-61, TASK 836 NORMAL, AND FMC BITE ON LT AND RT FMC REF FIM 34-61, TASK 801. NO CURRENT FAULTS, SYSTEM OPS NORMAL. GROUND VERIFICATION SUCCESSFUL.