SDR ASAA2013102996254

Service difficulty report · Cdu · Boeing 737890

Difficulty date: October 29, 2013
Submitted: October 31, 2013
Operation: Air carrier
Aircraft: N593AS
Make and model: Boeing 737890
Aircraft serial: 35107
Aircraft time: 21,679 hours, 6,765 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Cdu
Condition: Malfunctioned
Location: Cockpit
Stage of operation: CL
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

DURING CLIMBOUT, FMC/CDU WENT BLANK FOR ABOUT 5 SECONDS, THEN IT ENTERED A BIT-TEST DISPLAY MODE WITH ASSOCIATED ILLUMINATION OF THE CALL FAIL EXEC LIGHTS. IT RESUMED NORMAL OPS WITHOUT ANYPILOT INPUTS, ACFT GROUNDED. CAPTAINS FMC/CDU OPS NORMAL. NO HISTORY 30 DAYS. REF MM 34-61-00. GROUND VERIFICATION GOOD.