Doing the usual VHHX-RJTT, take off RWY13 Track 136 115.5 VOR, climbing 7000 till WHISKY in 1.0.4 Tristar

Dial in FL370, haven't pressed any button to intervene/change. ALT window changes from 7000 ALT to 7200 ALT CAP (while 37000 is in the SELECT ALTITUDE box) and slowly climbs, uncommanded 500FPM. Fine, what ever, we are going to climb anyway. Hit VNAV, plane climbs at 500FPM. Cycle TM button to get the PMS EPR to work, and then we get climb thrust (apparently we shouldn't need to cycle TM button, just hit VNAV).

So now in CMD1, TM/VNAV/VOR, happy at 250knots. Plane heads upwards, trim wheel start slowly turning to pitch up, and up, and up. We are now >6000FPM and speed quickly dropping. Stick pushes forward to slow climb rate and gain speed but the trim wheel continues to trim for a nose up attitude for some time. Eventually it all sorts itself out and we doing M0.83 to FL370

Anyone else have the trim wheel and stick fight each other?

Below picture was borrowed from another post but illustrates the sequence needed to gain altitude.

On 4/26/2026 at 10:18 AM, RyanAlmeida95 said:

For the climb, engage CMD with VNAV selected and then select TM to follow the PMS EPR.

@Prof_Plumpy
When conducting a departure where a level off is required, first set your ATL SEL to 7000' so that the aircraft can level off at that ALT.
When you are required to climb again, select the appropriate altitude using the ALT SEL then select VNAV. It will take a moment to initiate the climb. The speed drops abit and VS should increase abit, once TM recognises this, you should see the SPD window change to the CLB EPR as commanded by the PMS. Once VNAV can acheive the relevant speed for the climb, then you should see what you want from the VS.

I've just done a departure from VHHX doing the DOTMI ONE ALFA Departure.
This is RWY13 > TH > WHISKEY (7000')> Track 090 > R-104 CH untill 100 NM. I chose to climb to 14000 when establishing on the radial of CH because I misread the instruction. 😅but the same principle applies.

Departure from VHHX on the DOTMI ONE ALFA just for fun. When it comes to the step climb later in the video from 7000' to 14000'.. I have done what I think may have happened to you when you tried to initate a climb to a new ALT. In this video it has also demonstrated that the ALT CAP works pretty well. 10:20min for the VNAV climb seeming not to work.
https://www.youtube.com/watch?v=QdNLNJF5K9E

Second video demonstrates the ALT CAP again and what happens when you select a new ALT then VNAV and wait a moment to allow the TM EPR to kick in. :) as it should.
https://www.youtube.com/watch?v=XyIR3biZdqU

I think it more about just waiting for the VNAV and TM to calculate the response and watch it happen :) I hope that helps anyway.

Also, not sure about the stick and trim fighting... mine seems to hold the speed as commanded by the PMS pretty well all the way to cruise when in VNAV.