What was found
WHEN ENGAGING LNAV WITH F/D 1 MASTER, ARM MODE FLASHES ON FMA, BUT WHEN F/D 2 IS MASTER, IT GOES DIRECT TO ENGAGED INDICATION. RETURN TO GATE. BITE OF FMCS SHOWED NO FAULTS PER B737 FIM 34-61. BIT OF DFCS PER B737 FIM 22-11 .
- Difficulty date
- August 24, 2019
- Submitted
- August 27, 2019
- Operation
- Air carrier
- Aircraft
- N903DN
- Make and model
- Boeing 737990ER
- Aircraft serial
- 32007
- Aircraft time
- 3,126 hours, 1,194 cycles
- System (JASC)
- 3460 · Flight Management Computing Hardware System
- Part
- Fmc
- Condition
- Malfunctioned
- Stage of operation
- IN
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.