CargoLux 747 loses Main Gear
- Thread starter DropTank
- Start date
Boris Badenov
This is no laughing matter.
As far as I understand it, they said they had some unspecified problem, dumped for ten minutes, and returned. I'd be curious to hear what the problem was, as, judging by the speed, I suspect they dumped to max landing weight and went right in.
Roger Roger
Bottom of the list
It seems like I read it was a failure of some/all gear to fully retract.
Screaming_Emu
Joe Conventional
I think they fixed it.
mightynimbus
Well-Known Member
Put a chair and a joystick on it,
and it will be very similar to how I feel when the isle at Safeway is being blocked by an inconsiderate courtesy scooter user.
Roger Roger
Bottom of the list
They “fixed the glitch”
inigo88
Composite-lover
Could be a coincidence but the center trucks are the ones with the body gear steering. The last picture in the OP of the gear on the ground almost looks photo shopped. There’s no oleo/main gear strut/torque links/etc. Did those parts really shear off (or fall off) that cleanly? It’s supposed to look like this:
View: https://flic.kr/p/7AeF
View: https://flic.kr/p/7AeF
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DropTank
Well-Known Member
Looks like an earlier retro encabulator. The Prefabulated Aluminite was likely fractured due to side fumbling.
You can see where the spurving bearings would normally attach to the marzel vanes. Likey damaged by the mal adjusted thermo tropic oscillator.
inigo88
Composite-lover
Different 747 for reference:
Dayum! Broke the torque link below the body gear steering actuators and there’s a little bit of unbroken oleo left. Oleo looked to me like it may have been intact in the video and then got broken during the tumbling down the runway. Looks like the entire oleo strut shot out the bottom of the main gear outer cylinder with the wheels and bogie attached.
DropTank
Well-Known Member
There is a sequence valve (shuttle valve) that positions the gear for retraction position and extension position (I forget the terminology). The valve, actuator, or linkage probably failed preventing proper retraction.
Upon landing it would cause a position where the truck angle would not be dampened upon touchdown and cause an oscillation or bounce possibly overstressing and causing separation.
Just a guess. Could have been socialism....
Richman
JC’s Resident Curmudgeon
I think the transmission failed to synchronize the cardinal-grammeters.
This video has a very concise explanation:
View: https://youtu.be/Ac7G7xOG2Ag
This video has a very concise explanation:
