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mj(at)yakuk.com
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 Posted: Mon Jul 10, 2006 12:14 am Post subject: Uplocks |
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In the UK we have a system of alerting owners at annual inspection for
problems. It works just like AD's on certified a/c. i.e. you check them and
then sign off, simple.
In 1998 the following was issued. Why is there not something similar in USA?
All life items and other "quirky" maintenance issues would be caught saving
some one grief down the line.
http://www.yakuk.com/img/piston.jpg record them in a book like this
http://www.yakuk.com/cap543.asp the same book as used for certified a/c.
MPD: 1998-016 R2
applicability: Yakovlev/ Aerostar SA.
Reason: The up-lock piston assembly in both nose wheel and main
undercarriage pneumatic circuits is prone to the accumulation of dirt and
moisture which can cause corrosion. In addition, deterioration in the rubber
seals due to lack of lubrication has been noted. There have been examples
where this corrosion has prevented the up-lock catch releasing, resulting in
a wheels up landing. Revision 2 was introduced to exclude the Yak 50 which
was included in error.
Compliance: Not later than the next 50 Hour inspection from the effective
date of this MPD, remove the up-lock piston assembly (Yak 52 Parts number,
524705-30) in both nose wheel and main undercarriage pneumatic circuits.
Dismantle and internally inspect for corrosion in the piston and cylinder.
Replace if corrosion is found. Inspect the seals and replace if necessary.
Repeat this inspection every 200 flying hours or every 3rd to permit flying
renewal whichever is sooner. Rubber parts are to be lubricated with an
appropriate rubber grease.
Record compliance with this MPD in the aircraft logbook.
Mark Jefferies for YAK UK Ltd <http://www.yakuk.com>
Lt Gransden Airfield <http://www.yakuk.com/egmj.asp>
Sandy, Beds
SG19 3BP - England
Conditions of <http://www.yakuk.com/cob.doc> business
00 44 1767 651 156 ph
00 44 1767 651 157 fx
00 44 7785 538 317 mob
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