SDR ASAA2018082195845

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: August 19, 2018
Submitted: August 21, 2018
Operation: Air carrier
Aircraft: N467AS
Make and model: Boeing 737990ER
Aircraft serial: 36362
Aircraft time: 16,691 hours, 5,609 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Part number: 1762000101
Part serial: 007485
Condition: Failed
Location: Left
Part time: 20,435 hours, 6,629 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

DURING CRUISE, FMC, MAP, AND VTK WARNINGS DISPLAYED ON CAPTAIN'S DISPLAY. RAN QRH AND SELECTED FMC BOTH ON RT FOR REMAINDER OF FLIGHT IAW QRH PROCEDURE. ACFT GROUNDED. REPEAT WRITE-UP WITH SAME FAULT, PMG FAULT. LEFT FMC CURRENTLY OPS NORMAL. DUE TO HISTORY, REMOVED & REPLACED LEFT FMC IAW AMM 34-61-02. OPS NORMAL. SOFTWARE XFRD FROM RIGHT FMC.