SDR ASAA2020110633510

Service difficulty report · Warning Message · Boeing 737990ER

Difficulty date: November 6, 2020
Submitted: November 10, 2020
Operation: Air carrier
Aircraft: N469AS
Make and model: Boeing 737990ER
Aircraft serial: 41702
Aircraft time: 23,969 hours, 7,733 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Warning Message
Condition: False Indication
Location: Fmc
Stage of operation: NR
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

BOTH FMC'S SCRATCHPAD MESSAGE 'FMC VERTICAL DISAGREE" ANNUNCIATED MULTIPLE TIMES BELOW 8000'. GROUNDED-YES. LT AND RT FMC'S LOGGED FCC DATA-SYNC ERROR PERFORMED B737-900 FIM 34-61 TASK 835 LT AND RT FMC'S OPERATIONS NORMAL SEAMC STEVE CONSULTED.