SDR ASAA2022051938412

Service difficulty report · Switch · Boeing 737890

Difficulty date: May 19, 2022
Submitted: May 24, 2022
Operation: Air carrier
Aircraft: N588AS
Make and model: Boeing 737890
Aircraft serial: 35685
Aircraft time: 51,394 hours, 15,250 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Switch
Part number: UNKNOWN
Condition: Out Of Position
Location: Unknown
Stage of operation: CR
How discovered: V
Nature of condition: J
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

TEN MINUTES PRIOR TO DESCENT RIGHT FMC FAILED, RAN QRH AND COULD NOT RESTORE NORMAL OPERATION. GROUNDED - YES. REPOSITION FMC SWITCH TO NORMAL POSITION, B737-800 FIM 34-61 TASK 801 SHOW FMCS FLT LEG 1 SHOWS PRES POS LAT, ADIRS NO FAULTS FIM 34-21 TASK 801, FMCS TEST GOOD B737-800 AMM 34-61-00.