Today's Message Index:
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1. 09:47 PM - Re: Shimmy vibration? (woodja51)
2. 09:56 PM - Re: Nose gear collapse (woodja51)
Message 1
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| Subject: | Re: Shimmy vibration? |
Another area that can cause apparent shimmy is if there is wear in the extension
actuator upper/lower attachment points. I had no end of trouble with shimmy
-to the point I replaced the entire nose leg, tried to balance the tyre with lead,
changed the tyre, noise wheel bearings - you name it.
Lift the nose wheel and see if there is any movement in the fore aft direction.
You might notice this when you taxi as a pronounced clunking from the nose/firewall
etc.
If there is any significant wear in the upper actuator attach point you might
be able to take it out with adjusting the lower rod ( the over centre scissor)
but be very careful not to overdo it otherwise the down stay won't stay over
centre and the nose gear can collapse. In my case, about half -one turn fixed
the majority of the issue. All the other points may contribute of course. Matt
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http://forums.matronics.com/viewtopic.php?p=497525#497525
Message 2
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| Subject: | Re: Nose gear collapse |
Moving the aircraft without actuators installed will most definitely lead to a
collapse. Without the air /and or balls locked in, the same thing might happen
depending on which way you move it. For the interest of safety, making up some
gear locks when doing anything on the undercarriage unless its on jacks is a
good idea. These might simply be two bits of half tube with strong zip ties to
ensure the down stay remains over centre. Or a piece of appropriate sized wood
inserted to ensure the over centre. even modern airliners ground crew ( in
general ) insert the lock pins when towing aircraft - even with hydraulics applied.
FWIW. M
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http://forums.matronics.com/viewtopic.php?p=497526#497526
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