SDR ASAA2022040337887

Service difficulty report · Unknown · Boeing 737990ER

Difficulty date: April 3, 2022
Submitted: April 6, 2022
Operation: Air carrier
Aircraft: N407AS
Make and model: Boeing 737990ER
Aircraft serial: 41731
Aircraft time: 35,194 hours, 11,038 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Unknown
Part number: UNKNOWN
Condition: Unknown
Location: Unknown
Stage of operation: NR
How discovered: V
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

F/O SIDE MAP FLAG, NO VSPD FLAG AND LDG ALT FLAG. GROUNDED - YES. FOUND RT FMC FAIL ALONG WITH FMC DISAGREE MESSAGE. PULLED, THEN RESET FMCS COMPTR 2 C/B AND ACCOMP'D B737-900 FIM 34-61 TASK 801, OPS NRML AND ALL FLAGS AND MESSAGES EXTINGUISHED. ETOPS SIGNIF SYST - GND VERIFICATION SUCCESSFUL.