Service difficulty report · Computer · Boeing 737890

Difficulty date
September 19, 2021
Submitted
September 22, 2021
Operation
Air carrier
Aircraft
N531AS
Make and model
Boeing 737890
Aircraft serial
35199
Aircraft time
40,012 hours, 11,614 cycles
Engine
Ge
Part
Computer
Part number
1762000101
Part serial
012013
Condition
None
Location
E/E Rack E5-2
Part time
15,690 hours, 5,070 cycles
Stage of operation
CR
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

SINGLE FMC OPERATION APPEARED IN FMC SCRATCH PAD AND VTK AND MAP SHOWN ON FO ND. RAN QRH - DID NOT RESTORE RIGHT FO'S FMC OCCURRED ABOUT 2 HOURS INTO FLIGHT. GROUNDED - YES. RT FMC FLT HISTORY SHOWS HARDWARE FAILURE CODES ARINC & ASIC, BOTH FAULT CODES OCCURED ON FLTS 4-9. DUE TO CONSECUTIVE OCCURENCE, REMOVED & REPLACED RT FMC REF B737-800 AMM 34-61-02 2 C/B OPEN & CLOSED, SOFTWARE & PERFORMANCE FACTORS UPDATED, FMC OPS TEST PASS.