SDR AALA201708039023

Service difficulty report · Fmc · Boeing 737823

Difficulty date: August 2, 2017
Submitted: August 4, 2017
Operation: Air carrier
Aircraft: N938NN
Make and model: Boeing 737823
Aircraft serial: 33490
Aircraft time: 12,818 hours, 5,123 cycles
System (JASC): 3461 · Flight Management Computing Software System
Part: Fmc
Condition: Locked
Stage of operation: CR
How discovered: O
Nature of condition: G
Precautionary procedure: A

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

What was found

THE AIRCRAFT WAS GROUNDED. WHILE IN HOLDING BOTH FMCS LOCKED UP AND WE LOST THE FMC PROMPT ON BOTH BOXES. LOST BOTH MAP DISPLAYS. THRUST INDICATIONS VTR DISPLAYED ALONG WITH MAP. ALSO LOST REF AND FLAP SPEEDS. FLIGHT DECLARED AN EMERGENCY AND DIVERTED TO CLT WITHOUT FURTHER INCIDENT. RESET FMC 1+2 IAW AMM34-60-00. BITE CKD IAW AMM34-61-00. NO FAULT 30 DAYS, CK GOOD FOR SVC.