SDR AALA202001159002

Service difficulty report · Fmc · Boeing 737823

Difficulty date: January 14, 2020
Submitted: January 15, 2020
Operation: Air carrier
Aircraft: N964NN
Make and model: Boeing 737823
Aircraft serial: 31210
Aircraft time: 16,361 hours, 6,286 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Location: Cockpit
Stage of operation: DE
How discovered: O
Nature of condition: O
Precautionary procedure: K

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

What was found

AIRCRAFT NOT GROUNDED: ON DESCENT, EXPERIENCED DUAL FMC FAILURE. MOMENTS LATER, FMC NR 1 CAME BACK BUT FMC NR 2 STAYED FAILED. QRH PROCEDURES FOLLOWED AND FMC OK WITH BOTH ON 1. ACCOMPLISHED BITE CHECK PER AMM 34-01-08. OPS NORMAL. NO FAULTS.