SDR ASAA2016020115235

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: February 1, 2016
Submitted: February 5, 2016
Operation: Air carrier
Aircraft: N469AS
Make and model: Boeing 737990ER
Aircraft serial: 41702
Aircraft time: 5,850 hours, 1,950 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1762000101
Part serial: 009060
Condition: Failed
Location: Right
Part time: 5,888 hours, 1,959 cycles
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: O

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

What was found

CAPTAIN'S FMC FAIL AT FL 360, STRAIGHT AND LEVEL FLIGHT, 0=45 MINUTES AFTER TAKEOFF. OPERATED BOTH ON RT; LT-FMC DID NOT RECOVER. ACFT GROUNDED. MOVED FMC SELECT SWITCH BACK TO NORMAL. FMC LT OPS NORMAL. DUE TO HISTORY OF PREVIOUS FMC DISAGREE FAULTS, REPLACED LT FMC, REF AMM 34-61-02.