SDR ASAA2015031310956

Service difficulty report · Display · Boeing 737990ER

Difficulty date: March 13, 2015
Submitted: March 16, 2015
Operation: Air carrier
Aircraft: N459AS
Make and model: Boeing 737990ER
Aircraft serial: 36352
Aircraft time: 3,828 hours, 1,269 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Display
Condition: Malfunctioned
Location: Cockpit
Stage of operation: CR
How discovered: 9
Nature of condition: O
Precautionary procedure: O

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

What was found

ABOUT 2 HRS 40 MIN AFTER TAKEOFF, DURING CRUISE, BOTH CDU'S WENT TO THE MENN MODE WITH NO FMC PROMPTS. THE LT " CAPTAIN" MAP DISPLAYED A UTK FLAG, BUT LNAV / UNAV STAYED ENGAGED AND ALL RETURNED TO NORMAL IN LESS THAN 30 SECONDS. NOTE: A/T LIM "FLAG" SHOWED FRO THE AUTO THROTTLES, BUT ALSO RETURNED TO NORMAL. ACFT GROUNDED. REF FIM TASK 34-61-801 FOR FMC BITE-- NO CURRENT FAULTS. BITE CHECKS OK. SYSTEM RESTORED. OK FOR CONTINUED SERVICE.