SDR ASAA2016050316609

Service difficulty report · Fmc · Boeing 737890

Difficulty date: May 3, 2016
Submitted: May 5, 2016
Operation: Air carrier
Aircraft: N592AS
Make and model: Boeing 737890
Aircraft serial: 35190
Aircraft time: 32,151 hours, 9,860 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: CR
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

DURING CRUISE FLT, VTK DISPLAYED ON CAPTAIN'S MFD. BOTH FMC'S WENT BLANK WITH MAGENTA COURSE LINES ON CAPT SIDE. AFTER 1 MINUTE VTK WENT AWAY AND BOTH FMC'S CAME BACK ON LINE ALL OPS NORMAL. ACFT GROUNDED. PLACED FMC SELECT SWITCH TO NORMAL. NO FAULTS LOGGED IN LEFT FMC, NO VTK FLAGS. ACCOMPLISHED FMC BITE PROCEDURE REF B737-800 FIM 34-61 TASK 801, NO FAULTS. GROUND VERIFICATION TEST PASSED. THIS CLEARS MEL 34-36J.