SDR AALA201902059002

Service difficulty report · Fmc · Boeing 737823

Difficulty date: February 4, 2019
Submitted: April 3, 2019
Operation: Air carrier
Aircraft: N980AN
Make and model: Boeing 737823
Aircraft serial: 33203
Aircraft time: 30,560 hours, 12,338 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: O

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

What was found

BOTH FLIGHT MANAGEMENT COMPUTER SYSTEMS FAILED DURING DESCENT. CAPTAIN'S NAVAGATION DISPLAY MAP BLANKED, MAP FLAGS, WITH NO REFERENCE SPEEDS ON CAPTAIN'S SIDE. AFTER SEVERAL MINUTES CAPTAIN'S SIDE RETURNED AND FIRST OFFICERS SIDE FAILED FOR THE REMAINING SEVERAL MINUTES OF THE FLIGHT. THE AIRCRAFT WAS GROUNDED. PERFORMED FIM 32-09-00-810-820. NO FAULTS.