Bug or pilot error?

As mentioned I'm not sure what is happening here. When making a cold start everything looks fine until I start rolling. When getting back to idle sometimes the left hydraulic pressure suddenly starts fluctuating. You can see it in my track (the last 30 seconds are the interesting) when observing the gauges.

Both throttles were in idle position. You can see on the other gauges there was no input from my side. Sometimes the pressure loss is big enough to start a Master Caution which (if I'm suggesting correct disables NWS). Throttling up short solves this issue. I experienced this also during a landing yesterday.

I use a Hotas Warthog without any profile. Target is not running. I checked in the event logger that both throttles are working correctly. There was no "jumping" in positions or something like that. Also all other games worked fine.

Thanks in advance :pilotfly:

start up.trk

Do you have the random system failures option on?

Do you have the random system failures option on?

Nope!

The only addition I can make is that this happens only when making ramp starts (instant action, campaign e.g.). I never realized it when startin airborne or from the runway, even after landing.

When making a cold start everything looks fine until I start rolling. When getting back to idle sometimes the left hydraulic pressure suddenly starts fluctuating. You can see it in my track (the last 30 seconds are the interesting) when observing the gauges.

I looked at the track and can confirm the observation but unfortunately have no explanation. The best I can come up with: Might the hydraulic fluctuations have anything to do with the amount of brake pressure applied?

In renamed your track to .miz and performed a cold start myself. When I rolled, I got some fluctuation on the left hydraulic system when kicking the brakes, but the fluctuations were not as severe as in your track.

Basically, in your track I can confirm what you witnessed but I don't know why it happened.

Ok so I'm not totally crazy. I can confirm that most times the pressure increases again when pumping the brakes.

But I can't imagine this was intended since I lost NWS for some seconds during landing.

One new experience. started a fast mission on runway, as you can see in the track there was no engine Input during the first seconds. Pressure dropped under 2000PSI. Holding both brakes normalized pressure after some seconds (I created a deadzone of 20% to ensure that the braking peddals are not the reason for this).

Is there a possibility that a state exists between engine idle and off where the engine won't shut down but the left hyd. pressure falls down to zero?

pressure_2.trk