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TM mode goes to 000 EPR if AP is off


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Posted (edited)

Hello.

 

With a fully configured PMS and all that;

If I press TM mode but autopilot is OFF, it will command 000 EPR and retard the throttles.

image.thumb.png.e732da70054bf6272c1314f8d1f30540.png

Is it by design/ on purpose ?

Edited by Genista
typo in title
  • Genista changed the title to TM mode goes to 000 EPR if AP is off
Posted

From what I can find. 
For the climb, engage CMD with VNAV selected and then select TM to follow the PMS EPR.
TM is also compatible in semiautimatic mode and can be used with CWS engaged and or when using IAS or VS modes instead of VNAV.
TM at a bare minimum needs a FD and CWS/CMD on to operate VNAV or Semiautomatic performance operations to be guided by PMS. 

 Screenshot2026-04-26at08_07_26.thumb.png.b1167f7c7a6d8066e0aed7b2f791dd4f.png

Posted

I have had a few issues with altitude/VNAV. 

 

Out of VHHX there is a max alt of 7000 feet untill 17nm past the VOR.  The plane will (mostly) settle at 7000 feet in CMD VNAV/TM mode.  ALT CAP and should stick at 7000

 

Now when you dial in a new alt and do nothing else, it will often start to climb by itself. One time dialled in a new alt increase and it started going down, probably as it was in a turn and thats the way the plane was going vertically at the time.   According to the normal ops page above it should hold until you engage ALT SELECT+VNAV.  

There is also a lag of a few seconds between hitting VNAV and anything happening.  

 

Back to OPs problem.  Did you enter data on pages 1/2/3? (Weights/ToD/Cruise info)

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