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Bug with auto brakes

  • 747_Pilot
  • November 17, 2024 at 4:49 PM
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  • 747_Pilot
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    • November 17, 2024 at 4:49 PM
    • #1

    bug with autobrakes: when you touchdown the runway autobrakes disegnated

  • xxxx_Ting baby
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    • November 17, 2024 at 5:07 PM
    • #2

    On the 777F,as soon as you deploy the thrust reversers,the autobrake disengages from its preselected position. (Assumed temperature cannot be used!)

  • 747_Pilot
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    • November 17, 2024 at 5:20 PM
    • #3
    Quote from xxxx_Ting baby

    On the 777F,as soon as you deploy the thrust reversers,the autobrake disengages from its preselected position. (Assumed temperature cannot be used!)

    Yes, this happens on all aircrafts except the 737-500/900/MAX9

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    A350dabest
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    • November 17, 2024 at 11:48 PM
    • #4
    Quote from 747_Pilot

    bug with autobrakes: when you touchdown the runway autobrakes disegnated

    I GET the same thing!!!

    10th gen iPad

  • h__mnnv
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    • November 18, 2024 at 1:46 AM
    • #5

    Same bug with 777-300er

  • VolerSuisse333
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    • November 18, 2024 at 2:29 AM
    • #6
    Quote from h__mnnv

    Same bug with 777-300er

    It seems to depend on touchdown and braking force for me. With a gentle impact and gradual application of full reverse, the autobrakes engage. What is your technique?

  • h__mnnv
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    • November 18, 2024 at 4:57 AM
    • #7
    Quote from VolerSuisse333

    It seems to depend on touchdown and braking force for me. With a gentle impact and gradual application of full reverse, the autobrakes engage. What is your technique?

    Wait for touchdown of nose gear, and 50% reverse. For another technique, just ride an Airbus 😉

  • VolerSuisse333
    Guest
    • November 18, 2024 at 4:59 AM
    • #8
    Quote from h__mnnv

    Wait for touchdown of nose gear, and 50% reverse. For another technique, just ride an Airbus 😉

    Interesting— I usually use idle or normal reverse only; any intermediate setting does interfere with the autobrakes.

  • 747_Pilot
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    • November 18, 2024 at 5:46 AM
    • #9

    I know how fix it! Before touchdown (≈10ft agl) set throllte to 1% brakes

  • hmjr22
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    • November 18, 2024 at 6:34 AM
    • #10

    Actually, this is not a bug. When you activate the reverse thrust, it automatically engages the brakes as well. That's why the automatic braking is deactivated. To prevent this from happening, you need to manually engage the engine reverse thrust using the throttle lever, so you don't brake the aircraft at the same time.

  • Jet-Pack (IPACS)
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    • November 18, 2024 at 7:06 AM
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    • #11

    We need to know a few more details.

    Are you using the slider on the screen or some hardware controls?

    How far do you pull the slider back?

    Did you arm the ground spoilers before landing?

    Regards,

    Jan

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  • xxxx_Ting baby
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    • November 18, 2024 at 10:27 AM
    • #12

    Jet-Pack (IPACS)

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  • DickundDoof
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    • November 18, 2024 at 10:37 AM
    • #13

    I have full flaps 147kt autobrake 1-3, Spoilers are active,after touchdown the autobrake remains active. As soon as I activate the reverse thrust the autobrake jumps to D. This happens to everyone! Boeing aircraft. If you land hard the car brake immediately jumps to Dis. Android, Global

    Edited 3 times, last by DickundDoof (November 18, 2024 at 10:47 AM).

  • Jet-Pack (IPACS)
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    • November 18, 2024 at 1:03 PM
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    • #14

    I'm pretty sure it has nothing to do with the reversers as such, except if you can tell me the same happens if you pull the levers in the virtual cockpit aft.... I think there might be an issue with the way the slider message is sent to the aircraft.

    On which aircraft do you have this problem? Is is only the 777F or does it also occur on the 777-300ER or on the 737 and A320?

    Regards,

    Jan

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  • VolerSuisse333
    Guest
    • November 18, 2024 at 1:12 PM
    • #15
    Quote from Jet-Pack (IPACS)

    I'm pretty sure it has nothing to do with the reversers as such, except if you can tell me the same happens if you pull the levers in the virtual cockpit aft.... I think there might be an issue with the way the slider message is sent to the aircraft.

    On which aircraft do you have this problem? Is is only the 777F or does it also occur on the 777-300ER or on the 737 and A320?

    It seems to be present on both, but the A320 family has reverses that switch on/off so it’s very difficult to select idle reverse, and the brakes don’t activate unless more than 13% of the slider is used.

  • ZK Aviation
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    • November 18, 2024 at 1:21 PM
    • #16
    Quote from 747_Pilot

    bug with autobrakes: when you touchdown the runway autobrakes disegnated

    That's been a thing for years lol

    To counter this issue, I engage minimal reverse thrust immediately after touchdown until I think the autobrakes engage, then increase the thrust to the percent i want. (easier with Airbus planes since they light up). Though, there are still few occasions where it does disengage regardless, like shown in the video.

    Edited once, last by ZK Aviation (November 18, 2024 at 1:27 PM).

  • ZK Aviation
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    • November 18, 2024 at 1:25 PM
    • #17
    Quote from Jet-Pack (IPACS)

    I'm pretty sure it has nothing to do with the reversers as such, except if you can tell me the same happens if you pull the levers in the virtual cockpit aft.... I think there might be an issue with the way the slider message is sent to the aircraft.

    On which aircraft do you have this problem? Is is only the 777F or does it also occur on the 777-300ER or on the 737 and A320?

    From my experience, it's all the airliners that have autobraking.

  • 747_Pilot
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    • November 18, 2024 at 1:54 PM
    • #18
    Quote from Jet-Pack (IPACS)

    We need to know a few more details.

    Are you using the slider on the screen or some hardware controls?

    How far do you pull the slider back?

    Did you arm the ground spoilers before landing?

    I using slider on screen

    After touchdown I set to 50% back

    Yes, I do

  • xxxx_Ting baby
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    • November 18, 2024 at 1:57 PM
    • #19
    Quote from Jet-Pack (IPACS)

    On which aircraft do you have this problem? Is is only the 777F or does it also occur on the 777-300ER or on the 737 and A320?

    All planes

    Edited once, last by xxxx_Ting baby (November 18, 2024 at 2:04 PM).

  • 747_Pilot
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    • November 18, 2024 at 1:57 PM
    • #20
    Quote from Jet-Pack (IPACS)

    On which aircraft do you have this problem? Is is only the 777F or does it also occur on the 777-300ER or on the 737 and A320?

    It's happening with all aircrafts

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