SDR ASAA2021050334746

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: May 3, 2021
Submitted: May 6, 2021
Operation: Air carrier
Aircraft: N461AS
Make and model: Boeing 737990ER
Aircraft serial: 36363
Aircraft time: 26,726 hours, 8,527 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: First Officer'S
Stage of operation: CR
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

FO SIDE FMC FAILURE IN FLT RESURRECTED ITSELF AFTER 2 MIN. AFTER LANDING FO FMC VTK CYCLED ON/OFF. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 801, LAST FLT (2) SHOWED A FAULT OF PRES POS LAT RATE. PERFORMED FIM 34-61 TASK 824 INITIAL EVALUATION TEST GOOD. ADIRU BITE PROCEDURE FIM 34-21 TASK 801 CURRENT STATUS GOOD. ALSO REF FIM TASK 34-61-00-860-801, VTK AFTER LANDING A NUISANCE FAULT. GROUND VERIFICATION TEST GOOD.