SDR ASAA2014052107896

Service difficulty report · Display · Boeing 737890

Difficulty date: May 21, 2014
Submitted: May 23, 2014
Operation: Air carrier
Aircraft: N584AS
Make and model: Boeing 737890
Aircraft serial: 35682
Aircraft time: 25,736 hours, 7,717 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Display
Condition: Malfunctioned
Location: Left
Stage of operation: CR
How discovered: O
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

LEFT MCDU BLANKED TWICE IN FLT AT FL340. MCDU RECOVERED WITHIN 2-5 SEC BOTH TIMES. DURING BOTH RECOVERIES MULTICOLORED BITE SCREEN APPEARED BEFORE RECOVERY. BOTH MCDU BLANKING INCIDENTS WERE DURING LEVEL CRUISE FLT WITH NO BUTTON PUSHES OR WAY POINT SEQUENCING AT TIME OF BLANKING. ACFT GROUNDED. CLEANED LT MCDU IAW TASK 34-61-01-100-801. PERFORMED FIM 34-61-01-100-8. NO FAULTS NOTED. NO HISTORY IN 30 DAYS.