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1. 06:40 AM - Aileron hinge pins (aerosiam)
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| Subject: | Aileron hinge pins |
Both outer and 1 inner hinge showed signs of play at the 200 hour inspection. The
aileron could be moved vertically upwards. In flight, the ailerons were slightly
reflexing.
Thom Riddle advised that in the past he ordered a hinge set (body and pin) from
Fantasy and it was a simple job to remove and replace it.
Rather than go thru the process of trying to find 8 hinge sets for shipping to
Thailand, I removed the ailerons and replaced all the hinge pins with Mil Spec
hinge pin from Genuine Aircraft Hardware company which was about 13 dollars a
6 foot length. Part number MS20253P3-7200 which is 0.117 in or 2.97 mm. The originals
are 3 mm.
On the Allegro, the pins ends are flattened to prevent them slipping out. I couldn't
see a way of doing this without removing the hinge bodies which I didn't
want to do. I drilled each end of the new pin and used a cottar pin to secure
it.
The old pins showed little wear. The play was more from the loops on the hinge
bodies opening up very slightly. I don't know why this should happen on a plane
with relatively low hours.
I pinched the loops on each body so the pins were a perfect fit in all 8. There
is now no play and the ailerons no longer have a slight reflex.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=317851#317851
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