B737 Common VNAV
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Joined: Jan 2017
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From: Shropshire
B737 Common VNAV
Hi All-
I am brand new on type, and I trained using the ‘Basic’ VNAV on the 737, but now I will be going on to use the ‘Common’ VNAV option… I can’t seem to find anywhere that explains exactly what the differences are.
My previous understanding was that VNAV + SPD INTV to a speed higher than target behaved in a similar manner to LVL CHG in a descent, but it appears the same is not necessarily true for Common VNAV. if anyone could point me in the direction of something handy, it would be well appreciated!
I am brand new on type, and I trained using the ‘Basic’ VNAV on the 737, but now I will be going on to use the ‘Common’ VNAV option… I can’t seem to find anywhere that explains exactly what the differences are.
My previous understanding was that VNAV + SPD INTV to a speed higher than target behaved in a similar manner to LVL CHG in a descent, but it appears the same is not necessarily true for Common VNAV. if anyone could point me in the direction of something handy, it would be well appreciated!
Joined: Jan 2018
Posts: 863
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From: Amantido
I'm not sure what you're talking about, but I suppose you're talking about FMC U14.0?
FMC Update 14 (b737.org.uk)
FMC Update 14 (b737.org.uk)
- VNAV path tracking priority energy compensation.
- Maintains vertical path by adding thrust when a speed increase command is received via speed intervention.
- FMC will set VNAV target altitude to the current go-to waypoint constraint altitude if the waypoint is an “at or above” altitude constraint to prevent unintended climbs in descent.
Last edited by Banana Joe; 26th June 2021 at 14:25.
