SDR ASAA2022112540938

Service difficulty report · Warning Message · Boeing 737890

Difficulty date: November 25, 2022
Submitted: November 28, 2022
Operation: Air carrier
Aircraft: N566AS
Make and model: Boeing 737890
Aircraft serial: 35182
Aircraft time: 57,784 hours, 17,053 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Indication
Location: Fmc
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

R/O FMC FAILED DURING DESCENT: SINGLE FMC OPS. VTK AND MAR FLAGS ON F/O ND F/O FMC RESET ON ITS OWN, ANP INCREASED TO 0.54 NM PRIOR TO REDUCING TO 0.10 NM WITHIN 15 MINUTES APPROX. GROUNDED - YES. PERFORMED B737-800 FIM 34-61 TASK 836 FO FMC OPS TEST GOOD.