SDR ASAA2021012133930

Service difficulty report · Fmc · Boeing 737890

Difficulty date: January 21, 2021
Submitted: January 26, 2021
Operation: Air carrier
Aircraft: N596AS
Make and model: Boeing 737890
Aircraft serial: 35688
Aircraft time: 46,099 hours, 13,786 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Failed
Location: First Officer'S
Stage of operation: DE
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

ON DESCENT FO'S FMC FAILED. VTRK ON FO'S MFD. FMC DISAGREE. UNABLE REQ'D NAV PERFORMED RNP. FMC DISAGREE REMAINED ON FOR LAST 10-20 MIN OF TAXI. GROUNDED-YES. RAN B737-800 FIM 34-61-TASK 836. CYCLED POWER BOTH FMC'S. OPERATIONS RESTORED AND CHECK OKAY, REF SAME.