When the 787 was first released, many users complained about the gear doors automatically opening after takeoff, and the ‘bug’ was eventually fixed.
However, in real life, the gear doors on the 787 actually do open automatically once the plane has sensed that the wheels have left the ground, improving efficiency.
Perhaps this feature can be added back?
Is there any evidence or link to this? I read that the landing gear doors only open after the pilots give the command.
As you can see here the doors are open so early because the plane probably sensed the plane was off the ground due to winds creating slight lift.
There must be another reason for this. I don't think the flaps normally open without pilot intervention. What would be the point of this? Perhaps there are experts here at Forum. However, there is a video that shows that the flaps close automatically if the landing gear is not retracted after a certain time.Very strange indeed, as I said, perhaps there are real experts here in the forum who have some idea about this.
I've read in several reports that the landing gear doors only open when the lever in the cockpit is activated. I don't know where you got the contrary information from.
I’m going to debunk this rn
1: there’s a lever in the cockpit for a reason.
2: aviation there are a lot of redundancy and it will be a red flag if this happens irl
3: gear is compress and gear lever up computer will comm with the compression system to see if gear is compressed if X then go up if it is gear will remain in a locked position until no compression.
4: Incident report pilots pulled gear lever up too early leading to the situation
And I don't remember ever having this feature of auto-gear in the 787 since its release
We have had this in the past but in the majority of takeoff videos of real world aircraft I didn't see this, so we removed it. This might be one of the many airline specific options.
Since the opening of the gear doors itself also causes drag it might not be as beneficial if the pilots tend to raise the gear a bit late.on average. It really only saves a tiny amount of fuel compared to how long the plane is usually flying. I guess just 5 seconds of speed brake already wastes more fuel than can be saved with the gear doors opening right after lift off.
Ok. On yt find this old video from 320 sim pilot before he flew the 787. Here he is being guided by a real 787 pilot.
Go to 1:23:13. The 787 pilot clearly says that gear doors open automatically after takeoff.
Hope this clears any confusion.
Ok. On yt find this old video from 320 sim pilot before he flew the 787. Here he is being guided by a real 787 pilot.
Go to 1:23:13. The 787 pilot clearly says that gear doors open automatically after takeoff.Hope this clears any confusion.
Yes, it also specifies that in the FCOM. Yet it's not what the real airplane does in many cases. Not the first time the FCOM says A but real world says B. Or it's just an option...
Ok. On yt find this old video from 320 sim pilot before he flew the 787. Here he is being guided by a real 787 pilot.
Go to 1:23:13. The 787 pilot clearly says that gear doors open automatically after takeoff.Hope this clears any confusion.
Coming from a Singapore Airlines and Ex Republic of Singapore airforce A332-MRTT aerospace engineer I do work on the B787-10/-9 very often non of the pilots nor maintenance manuals ever state that.
As jan said, it was probably just an airline option.
It might have been, not sure.
On the Boeing 787-9 or 787-10, the landing gear doors open immediately after takeoff, even before the pilot retracts the landing gear. Some think it’s a mistake or say that this isn’t possible. In reality, this is a completely normal and intentional function, built into the aircraft systems by Boeing itself. This feature is called early gear door opening, and it is implemented only on the 787-9 and 787-10 models. The idea behind it is that about one second after liftoff when the sensors detect there is no longer any weight on the wheels the system automatically opens the gear bay doors. This happens regardless of whether the pilot has moved the landing gear lever to the UP position or not. At this point, the landing gear remains extended it is not retracted automatically. For the gear to actually retract, the pilot must manually move the gear lever to the UP position. Only then will the landing gear retract into the bays, and the doors, which are already open, will close. If the pilot leaves the lever in the DOWN position, the gear will stay extended, and after about 30 seconds, the doors will simply close again. This system is designed to speed up the gear retraction process and improve takeoff efficiency. While the pilot reaches for the gear lever, the doors are already open and the system is ready to retract the gear immediately, without delay. It also reduces vibration and improves aerodynamics during the initial climb. Such a function does not exist on other aircraft including the Boeing 787-8, 777, 737, or the Airbus A320, A350, and others where the gear doors only open after the pilot commands gear retraction. So, on the 787-9 and 787-10, the automatic opening of the gear doors immediately after takeoff is not a mistake, glitch, or airline specific modification. It’s part of the aircraft’s design and gear logic. It is a fully normal and safe feature
On the Boeing 787-9 or 787-10, the landing gear doors open immediately after takeoff, even before the pilot retracts the landing gear. Some think it’s a mistake or say that this isn’t possible. In reality, this is a completely normal and intentional function, built into the aircraft systems by Boeing itself. This feature is called early gear door opening, and it is implemented only on the 787-9 and 787-10 models. The idea behind it is that about one second after liftoff when the sensors detect there is no longer any weight on the wheels the system automatically opens the gear bay doors. This happens regardless of whether the pilot has moved the landing gear lever to the UP position or not. At this point, the landing gear remains extended it is not retracted automatically. For the gear to actually retract, the pilot must manually move the gear lever to the UP position. Only then will the landing gear retract into the bays, and the doors, which are already open, will close. If the pilot leaves the lever in the DOWN position, the gear will stay extended, and after about 30 seconds, the doors will simply close again. This system is designed to speed up the gear retraction process and improve takeoff efficiency. While the pilot reaches for the gear lever, the doors are already open and the system is ready to retract the gear immediately, without delay. It also reduces vibration and improves aerodynamics during the initial climb. Such a function does not exist on other aircraft including the Boeing 787-8, 777, 737, or the Airbus A320, A350, and others where the gear doors only open after the pilot commands gear retraction. So, on the 787-9 and 787-10, the automatic opening of the gear doors immediately after takeoff is not a mistake, glitch, or airline specific modification. It’s part of the aircraft’s design and gear logic. It is a fully normal and safe feature
Very informative explanation, but then IPACS would have to change it again. Thanks for the information 👍
It’s part of the aircraft’s design and gear logic. It is a fully normal and safe feature
Do you have official documentation somewhere that can back this up? I'd like to read that to learn more.
