SDR ASAA2018052194703

Service difficulty report · Fmc · Boeing 737900ER

Difficulty date: May 19, 2018
Submitted: May 21, 2018
Operation: Air carrier
Aircraft: N403AS
Make and model: Boeing 737900ER
Aircraft serial: 41730
Aircraft time: 22,036 hours, 7,247 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Left
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

LEFT VTK FLAG, BOTH CDU'S BLANK DURING CRUISE. IAW QRH AFTER 1 MINUTE WITH FMC SWITCH BOTH ON R, LEFT FMC CAME BACK ONLINE AND RESET FMC SWITCH TO NORMAL. AFTER APPROX 1 HR VTK FLAG RETURNED. LEFT FMC INOPERATIVE. ACFT GROUNDED. ACCOMPLISHED FIM 34-61, TASK 836. CLEARED OPS RESET & DOWN MODE. OPS NORMAL. NO PREVIOUS HISTORY.

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