What was found
WHILE AT CRUISE "SINGLE FMC" MESSAGE DISPLAYED ON SCRATCH PAD. LNAV AND VNAV DISAGREED. AFTER 3 MIN DUAL FMC RESTORED. NORMAL OPS. GROUNDED - YES. CHECKED FMC, NO FAULTS NOTED. SYS OPS NML. REF B737-900 AMM 34-61-00.
- Difficulty date
- December 12, 2018
- Submitted
- December 15, 2018
- Operation
- Air carrier
- Aircraft
- N403AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41730
- Aircraft time
- 24,381 hours, 8,017 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Warning Message
- Condition
- False Activation
- Location
- Fmc
- Stage of operation
- CR
- 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.