SDR ASAA2021032434404

Service difficulty report · Fmc · Boeing 737890

Difficulty date: March 24, 2021
Submitted: March 26, 2021
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 46,603 hours, 13,912 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: DE
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 DESCENT FMC P/RST LIGHT WITH VTK WARNING & SINGLE FMC OPERATION ON FO'S FMC SCRATCHED & NAV DISPLAY. REPEAT WRITE-UP - SEE LOG PAGES 60055253 & 60055260. GROUNDED - YES. RAN FMC BITE REF B737-800 FIM 34-61 TASK 801. BOTH FMC LOGGED RIGHT FMC FAIL. RAN FIM TASK 34-61 TASK 836 OPS RESTORED TO RIGHT FMC. VERIFIED BOTH LEFT & RIGHT FMC SOFTWARE REF B737-800 AMM 34-61-00-750-801. OKAY FOR SERVICE.