What was found
LNAV AND VNAV MODES UNAVAILABLE ON MCP. GROUNDED - YES. FMC #1 HAD A PGM FAULT. REBOOTED LH FMC AND NORM OPS RESTORED. OPS CK OK REF B737-900 AMM 34-61-00-710-801 FMC OPS AND LNAV VNAV SELECT OK.
- Difficulty date
- January 23, 2023
- Submitted
- January 24, 2023
- Operation
- Air carrier
- Aircraft
- N464AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40714
- Aircraft time
- 32,987 hours, 10,239 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Fmc
- Condition
- Faulted
- Location
- Left
- Stage of operation
- NR
- 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.