G'day Ian.
Check to see if there is a bush in the rod end taking it from 8 to 6 mm.
I think that is what ours has. If not then is the bush a suitable solution?
There is no OZ A.D. for the Elevator control horn. However the GFA does have
the Hoffman Service Bulletin in it's records as that is where we got it
from.
GYT had a slight problem with it but was not bad at all. It was found about
it's 4th annual I think after the restoration. It had been OK up to then.
Ours NHB and J.V's
GVQ did not have signs of the problem and ours still doesn't and I think
the same for GVQ. This really is something we would check at an Annual
Inspection under the GFA guidelines anyway so not real worried about the
A.D. part myself.
In the case of GYT after we opened it up we found virtually no corrosion.
Certainly nothing of concern. However the movement of the horn in relation
to the rib was due to shrinkage of the timber and not unusual generally in
FRP Aircraft. I just did a standard repair method to it as we normally would
for this problem in any other aircraft. I cut the lower skin back just far
enough to get at the bolts. Then removed the bolts and we cleaned the inside
of the holes in the plywood rib with a bit of fine sandpaper rolled into a
cigar. Mixed up cotton flock and resin and pushed into the holes. Waxed the
bolts and slid them into place. Cleaned the threads and fitted the nuts.
Then a standard FRP repair the the composite skin of the elevator.
It was a breeze and I think the replacement rib in glass from Diamond is
overkill.
This is a common fix as I mentioned and to date GYT has shown no signs of a
recurrence and nor would I expect it.
I checked the Mass Balance after the repair and there was no need to fit a
mass to the lever. The change in weight from the repair scheme I used was
almost undetectable.
Hope that's of help.
Cheers.
Nige.
----- Original Message -----
From: "Ian Williams" <[email protected]>
To: <[email protected]>
Sent: Tuesday, March 15, 2011 8:33 AM
Subject: [DOG mailing list] Dimona questions
Hi
I am working on completing the Ex Thai Dimona imported into New Zealand some
years ago and have a couple of issues which have come up which I am sure can
be answered by someone in the list.
The first relates to the 2 rod ends at the outer end of the elevator. They
have a 6mm dia rod end hole but have an 8mm thread. (normally a 6mm rod end
has a 6mm thread) There does not seem to be any diagram in the H-36 parts
book of it, and the NZ Hursshmann agents have not got them listed. Maybe
this is another "special" (and really expensive like the front tailplane rod
end). The existing ones are too corroded to reuse. So my question is ....
does anybody know the part number of those rod ends??
The second question relates to the 2 work orders relating to a rib
replacement and operating arm / bearing in the elevator plus balancing
weights on the end of the actuating arm .... it doesn't appear to be an AD
.... does anybody know about that?? It seems logical to do it based on
the level of corrosion on this specific aeroplane.
Best regards
Ian Williams
Drury
Auckland
New Zealand
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