SDR ASAA2017052620896

Service difficulty report · Fmc · Boeing 737890

Difficulty date: May 26, 2017
Submitted: May 30, 2017
Operation: Air carrier
Aircraft: N516AS
Make and model: Boeing 737890
Aircraft serial: 39044
Aircraft time: 32,145 hours, 9,774 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Unknown
Stage of operation: DE
How discovered: O
Nature of condition: N
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 THROUGH FL190, THE FIRST OFFICER`S FMC CALL, FAIL, OFST, MESSAGE LIGHT ILLUMINATED AND SCREEN BLANKED FOR 10 SECONDS. RECOVERED ON ITS OWN WITHOUT ANY FURTHER ACTION. ACFT GROUNDED. PERFORMED FMCS BITE IAW FIM 34-61, TASK 801. INFLT FAULT SHOWED B FOR RIGHT CDU. NO SENSOR FAULTS SHOWED. PERFORMED FIM 34-61, TASK 804 FOR CDU BLANKING. FAULT CORRECTED IAW REPAIR CONFIRMATION.