SDR ASAA2015100713398

Service difficulty report · Warning Flag · Boeing 737990ER

Difficulty date: October 7, 2015
Submitted: October 9, 2015
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737990ER
Aircraft serial: 41731
Aircraft time: 11,492 hours, 3,651 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Flag
Condition: False Indication
Location: Fmc
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

AT CRUISE, FL 350, VTK FOLLOWED BY MAP FAILURE FLAG ON CAPTAIN'S NAV DISPLAY. VNAV, LNAV DISCONNECTED. PRIOR TO COMMENCING CHECKLIST, PROBLEM RESOLVED ITSELF AND SHOWED OPS NORMAL. ACFT GROUNDED. ACCOMPLISHED FIM TASK 34-61, TASK 801, NO FAULTS NOTED. CHECKS OK REF SAME.