SDR ASAA2013070695483

Service difficulty report · Fmc · Boeing 737890

Difficulty date: July 6, 2013
Submitted: July 9, 2013
Operation: Air carrier
Aircraft: N564AS
Make and model: Boeing 737890
Aircraft serial: 35103
Aircraft time: 25,681 hours, 7,960 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1741010201
Part serial: 001229
Condition: Failed
Location: Flight Deck
Part time: 45,146 hours, 18,719 cycles
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

DURING CRUISE FLT, LEFT FMC FAILED, SCREEN WENT BLANK THEN WENT TO BITE TEST SCREEN WITH ALL WARNING LIGHTS ON. THEN RETURN TO NORMAL OPS. OPS INFO, THIS HAPPENED ONLY ONCE THEN OPS NORMAL FOR REMAINDER OF FLIGHT. ACFT GROUNDED. LT FMC BITE FAULTS LT FMC CDU FAIL, 1 FLIGHT LEG. REPLACED LT FMC MCDU REF MM 34-61-01, OPS NORMAL IAW SAME. LT FMC OPS NORMAL REF MM 34-61-00. ETOPS GND VERIFICATION TESTS SUCCESSFUL.