Have a look at the pressure being applied to the Flap actuator cross
tube during retraction.
I had the same problem and needed to reduce the tube length about 1/4
inch on each side.
As the flaps extend they travel inwards and there is a potential for
them to foul and make it dificult to finish the gear up cycle. With load
on the wings (slight ) extra diheadral is there so I applied an upload
about mid span before I could find what was happening.
Jim McAvoy
Australia 400
----- Original Message -----
From: ROBERT LINDSAY
To: europa-list@matronics.com
Sent: Tuesday, February 05, 2008 1:46 PM
Subject: Europa-List: Mono-wheel gear retraction
After being installed for seven years and about 400 flight hours, I am
unable to fully retract my landing gear after take-off.
Retraction commences easily enough but resistance rapidly builds and
near the end of the stroke resistance builds to a point where I end up
with max effort about three mm short of the uplock shoulder. This
difficulty has been growing over a period of time--but in the past
overcome by pushing harder. Gear extension is easy with no problems.
Is this simply a bungee problem? Have others experienced a bungee age
problem where the bungee had to be replaced? If so, how does one attack
the replacement procedule? Would a slightly thicker bungee be better?
Looks like the job will be quite involved.
Or, if the bungee should still be good, could there be some mechanical
or misalignment problem?
Bob Lindsay A077
Gillespie Field (KSEE)
California
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