What was found
LOSS OF LEFT FMC WITH VTK FLAG DISPLAYED AT FL340. BOTH FMCS RECEIVED WITH QRH PROCEDURE. NORMAL OPS. ACFT GROUNDED. NR 1 CDS LOGGED FMC DATA LOSS, NO HISTORY TEN LEGS. SYS TESTED GOOD IAW AMM 34-61-00-710-801.
- Difficulty date
- August 31, 2017
- Submitted
- September 5, 2017
- Operation
- Air carrier
- Aircraft
- N486AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44107
- Aircraft time
- 7,786 hours, 2,625 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Fmc
- Condition
- Malfunctioned
- Stage of operation
- CR
- 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.