ATR 72-600 Can't disable prop brake

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1

:wave: Thank you for using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it.

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Are you using Developer Mode or made changes in it?

No

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

Yes

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

ATR 72-600

Brief description of the issue:

Cannot disable propeller brake (which means the ATR - Unable to disable PROP BREAK isn’t fixed)

Provide Screenshot(s)/video(s) of the issue encountered:

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Detailed steps to reproduce the issue encountered:

I went by pre-start checklist up until taxi when I saw visually that right propeller isn’t running.

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:

1.33.8.0

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Do you have the same issue if you follow the OP’s steps to reproduce it?

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2

There are plenty of posts explaining how to do this now that the ATR has been “fixed” to reflect the real world aircraft. You need to activate the electric hydraulic pump to provide the hydraulic pressure to operate the prop brake. The button to activate it is below/aft of the throttles.

3 Likes
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I see what you referring to. But you see
 do you see ‘Ready’ left to Prop brk? That means that hydraulic pump is working. I can attach screenshot why it is working, the pressure comes from Blue pump because the left engine is running:
image

Thus, as you can see, it provides the hydraulic pressure to both flaps AND prop break. The flaps are working. The propeller brake is not.

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Yes. I was playing with this last night after I’d followed the correct procedure and did hit the same problem. It looks like the ATR has been coded to work with Aux Hydraulic Pressure only whereas logic says it should work with Blue and also Green if the cross feed is open.

I’ve been flying it today and just made sure I followed the normal process. Just hit the electric pump button before releasing the prop brake.

I’m really enjoying it and can only recommend persevering with it. I find it is much improved over the initial release but even that was fun after finding work arounds for the minor issues.

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Btw if you actually stop left engine, nothing will change (even with closed crossfeed valve). So I filed another bug for it :smiley:

UPD: It seems the only way for prop break to work is with left engine stopped AND with Aux Hydraulic Pressure. If the left engine is running, you cannot disable prop break, no matter whether you run aux hydraulic pressure or not, it just doesn’t work
UPD2: AND it requires RH condition lever to be set at ‘Feather’ only, if you set it to Auto, it won’t work as well
UPD3: And aux hydraulic pressure seems to work forever, when actually it has to turn off after 30 seconds. Odd
UPD4: It works with external power connected to the pumps (as it should)

6

Do you have the same issue if you follow the OP’s steps to reproduce it?

yes 72 and 42 both will not release hotel brake once engaged

Provide extra information to complete the original description of the issue:

must start second engine, cut fuel to hotel engine, restart 1st engine each time

If relevant, provide additional screenshots/video:

can’t don’t know how but suffice it is the same as the one you have.

7

With engine 1 running, engine 1 condition lever must be at auto and you must wait until the ready light is turned on while keeping engine 2 condition lever at feathering, which make sense, since the propeller must be above a certain speed for the hydraulics to work, enabling activation or deactivation of the prop brake

4 Likes
8

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes.

Provide extra information to complete the original description of the issue:

I have to restart the engine completely to get the right prop to turn.

If relevant, provide additional screenshots/video:

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it works now - let me know if you need help

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I do not have any issues with the prop brake after the latest update ~1 month ago.

The only thing that seems odd is that the Ready light is illuminated in hotel mode when the right condition lever is set to auto. I cannot deactivate the prop brake (as I would expect) but ready is illuminated.

11

:wave: Thank you for using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it.

2 tags are required: One for platform, and one for aircraft.

Are you using Developer Mode or made changes in it?

no

Have you disabled/removed all your mods and addons? If the issue still occurs with no mods and add-ons, please continue to report your issue. If not, please move this post to the Community Support section.

yes

Which aircraft are you reporting an issue about? (Please also add the proper tag for it)

atr72

Brief description of the issue:

Can’t turn off Prop Brake. Prop brake light remains illumiated. NP doesn’t rise

Provide Screenshot(s)/video(s) of the issue encountered:

Detailed steps to reproduce the issue encountered:

PC specs and/or peripheral set up if relevant:

Build Version # when you first started experiencing this issue:

SimVersion:1.33.8.0 / Aircraft Version:1.0.20

:loudspeaker: For anyone who wants to contribute on this issue, Click on the button below to use this template:

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

12

For some unknown reason, moving your viewpoint to the co-pilot position allows you to do it.

13

Please make sure during your start up procedure with ground power attached and on. Make sure your Hydraulics switches are on. Cross feed not necessary. underneath the parking break is a button that temporarily charges your hydraulic lines. Make sure your prop levers are in the cutoff position. The ready light will not illuminate under 3 conditions. No hydraulic pressure available, throttle is not idle, and prop levers are not in the cutoff detent.

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That seems related to camera perspective allowing you to click the switch, rather than the guard, no?

15

His problem is getting the ready light to illuminate.

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Concur with the first reply, make sure the hydraulic lines are charged by clicking the button on the center console a few times to get the “ready” light to turn on before trying to disengage the brake. This is new since the 1st update.

17

Also, try engaging the gust lock before hitting the aux hyd pressure button.

18

Thanks for your reply. I forgot to apply temporary hydraulic pressure. My bad
sorry

19

Hi all, I had the same issue and I found the reason why

Not sure if you have found the answer but the procedure is to put the engine start mode on “Start A&B”.

1 Like
20

Do you have the same issue if you follow the OP’s steps to reproduce it?

Provide extra information to complete the original description of the issue:

If relevant, provide additional screenshots/video:

Estou com mesmo problema . Fica igual na imagem