SDR ASAA2017093022088

Service difficulty report · Fmc · Boeing 737890

Difficulty date: September 30, 2017
Submitted: October 2, 2017
Operation: Air carrier
Aircraft: N535AS
Make and model: Boeing 737890
Aircraft serial: 35200
Aircraft time: 26,337 hours, 7,629 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Nr 1
Stage of operation: CR
How discovered: O
Nature of condition: P
Precautionary procedure: O

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

What was found

NUMBER 1 FMC WENT BLANK DURING MODERATE TURBULENCE AT FL380. DISPLAY WAS REGAINED AFTER ABOUT 20 SECONDS AND DEPRESSING ON UNIT. ACFT GROUNDED. TROUBLESHOOT IAW FIM 34-61, TASK 801. NO FAULTS. NO HISTORY IN THE PAST 30 DAYS. OPS NORMAL.