What was found
LNAV AND VNAV WILL NOT ENGAGE ON GROUND. GROUNDED - YES. SHUT A/C POWER DOWN AND REBOOTED AND REPOWERED SYSTEM LNAV VNAV AUTO PILOT SYSTEM OPS NORMAL SYSTEMS LNAV VNAV ENGAGE NORMAL IAW AMM 20-60-99-760 OK TO CONTINUE SERVICE.
- Difficulty date
- August 7, 2019
- Submitted
- August 9, 2019
- Operation
- Air carrier
- Aircraft
- N403AS
- Make and model
- Boeing 737900ER
- Aircraft serial
- 41730
- Aircraft time
- 26,934 hours, 8,800 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Not Reported
- Condition
- Unknown
- Location
- Unknown
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.