LNav in 737-900

[Rickie Welsh 27]

Hello all, I have been flying the 800 with all the relevant keyboard/PMDG commands with no problems. However, yesterday I changed to the 900 and loaded a flight and tried to load the LNav on the ground without success, I carried on and took off, engaged VNav and A/Pilot and only then did LNav take effect. I was under the impression that Boeing permitted activation of LNav on the ground or is the 900 an exception. Thanks in advance. richard welsh.

[Flamin_Squirrel 71]

The first way point must be within 5° of runway heading for LNav to arm on the ground.

[RYR738 9]

Also, sometimes people forget the obvious ! You must have an active route in the CDU !!! Fred.