Bud
I have not installed Mod 51 and have been flying with lots of landings for
10 years, am I living dangerously? I check the gear and don't see issues but
am I missing something? Am I the only one with out Mod 51?
Jerry
Mono 914
_____
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Bud Yerly
Sent: Tuesday, July 13, 2010 5:17 PM
Subject: Re: Europa-List: Check your Landing Gear Retraction Lever Strut
(Mod 51)
Klaus and others,
Please send me pictures of your elongations or failures of the strut for me
to analyze. If you can provide the type material and thickness also.
Normally 6061 common aluminum angle of 1.6 mm or 1/16 inch is plenty strong
enough.
Elongation of the hole at the bottom indicates slight movement of the gear
lock ,retraction mechanism (most probably in the down position) due to not
staying perfectly vertical with the gear down and eventually the stresses
---From bending, as Klaus said, or from the latch slot gear retraction arm
interface bending, and or the three bolts elongation has caused fatigue of
the material or too much force on the aluminum angle strut.
We will need some look see time to evaluate should if we go to steel or a
specific material/dimensions, time change, or what.
In the mean time, if everyone can look at their Mod 51 landing gear
retraction lever strut brace if over say 500 hours and look for wear, as
soon as you can, and low time planes on your next annual, then send me
updates, I'd appreciate it.
Many thanks,
Bud Yerly,
Europa Tech Assistance.
direct email: budyerly@msn.com
or just hold control key and click below to email
via Europa website: mailto:enquiries@europa-aircraft.com
via Custom Flight Creations website: mailto:mail@customflightcreations.com
----- Original Message -----
From: klaus <mailto:klaus.dietrich@oracle.com> dietrich
<mailto:MCA234@aon.at> Keppert
Sent: Tuesday, July 13, 2010 1:29 PM
Subject: Europa-List: Check your Landing Gear Retraction Lever Strut (Mod
51)
Check your Landing Gear Retraction Lever Strut (Mod 51)
after 10 years in service and some 800 hours with as many landings, my
Landing Gear Retraction Lever Strut (Mod 51) had an oval oversize hole at
the bottom end (14mm; for the MS 20392-5C37 bolt which is 9,5 mm) and it
finally broke at the top (just below the AN 3 bolt probably due to some
misalignment due to the play at the bottom...
no play at the top AN 3 bolt, however!
The three screws on the Landing Gear Retraction Lever at the top seem to
hold (no play)....
I'm still searching for an explanation; my aluminum angle was probably not
strong enough: material thickness: 1,5 mm; L-profile: 20 mm x 8 mm
also the strut is not absolutely straight and there is some sideways
flexibility which may have favored the play...
Klaus
href="http://www.matronics.com/Navigator?Europa-List";>http://www.matronhref
"http://forums.matronics.com";>http://forums.matronics.com
href="http://www.matronics.com/contribution";>http://www.matronics.com/c
|