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aerostar6
Joined: 26 Jun 2008
Posts: 33
Location: Amersham, UK
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 Posted: Wed Feb 05, 2014 3:21 am Post subject: Worldwide YAK 50 survey |
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Fellow YAK 50 owners,
I am looking for help from you to build up a real world repository of experience in operating and maintaining the YAK 50.
Why? I have the misfortune to live in the UK, where, as a result of the aircraft having been ex-military, and therefore uncertified, it is operated under a "Permit to Fly", system, whereby the UK CAA allow us to operate outside the fully regulated EASA regime. Unfortunately, the YAK 50 comes from the former USSR with an official lifetime of a paltry 300 hours, a legacy of its manufacture in a communist state, where it was better to employ someone to make more aircraft than to have a scheme where the longevity of the aircraft could be extended by a careful maintenance regime.
Consequently, our over cautious authority, asked the Yakovlev Design Bureau, (who had no real interest in the machine after the collapse of communism, other than as a useful income stream from rich westerners) to come up with a "life extension" scheme. This has involved, at great expense, removing the wings, tail unit and engine bearers for full NDT inspection - every 100 hours!
So far, to my knowledge, apart from a spar bracket crack on my machine, which was put down t a manufacturing defect, no significant findings have been found across the UK fleet of 21 airframes. I know that the aircraft are operated safely worldwide on much more enlightened airworthiness rules, and I want to tap into that experience.
I, and some other owners have been trying to get the Authority to increase the time between these over cautious inspections and also to extend the next "interim life" limit of 600 hours. To this end a body of evidence proving the durability of this wonderful aircraft would be very useful in pressing our case to the feds.
To this end, could i ask 2 minutes of your time to briefly list the following:
Country of residence:
A/c Registration:
Serial:
Type of Airworthiness Regime/Lifetime/Inspection period:
G limits allowed:
Crucially, total hours (approx) at January 2014:
Any significant structural/system problems encountered over the life of the airframe.
Either post on the forum, or email off list. will collate the data and publish to all when I have a decent data set.
Thanks in advance,
Mark and the UK Aerostars team.
mwlevy(at)btinternet.com
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jan.mevis(at)informavia.b
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| Posted: Wed Feb 05, 2014 3:45 am Post subject: Worldwide YAK 50 survey |
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Hello guys,
My Yak 50: S/N 801807
Former RA2005K, now French "avion de collection", F-AZUK, based in France,
Compiegne.
I do annual inspections (the equivalent of 100 hour inspections) but the
COMPLETE responsibility is with the owner.
I have an official document stating that I and I alone am responsible for
the maintenance.
And I like that Š(of course I get assistance from good mechanics).
G-s allowed: still +9/-6, although I never do that.
Total hours since new: 318
No significant structural or system problems ever found, not in the books,
not at inspection.
I only had the usual minor issues like all Yak 50's (e.g. Tailwheel oleo).
I don't see any reason why the Yak 50 could not be operated for much more
than 300 hours, or 600 hours.
Of course these planes ARE oldtimers, and should be treated like that.
So if you limit the aerobatics forces to +6/-3 (or even a bit less, +5
should be enough) and if you do SERIOUS annual inspections, then they'll
be good to fly for years to come.
Only my 2 cents,
Jan
On 05/02/14 12:21, "aerostar6" <mwlevy(at)btinternet.com> wrote:
| Quote: |
Fellow YAK 50 owners,
I am looking for help from you to build up a real world repository of
experience in operating and maintaining the YAK 50.
Why? I have the misfortune to live in the UK, where, as a result of the
aircraft having been ex-military, and therefore uncertified, it is
operated under a "Permit to Fly", system, whereby the UK CAA allow us to
operate outside the fully regulated EASA regime. Unfortunately, the YAK
50 comes from the former USSR with an official lifetime of a paltry 300
hours, a legacy of its manufacture in a communist state, where it was
better to employ someone to make more aircraft than to have a scheme
where the longevity of the aircraft could be extended by a careful
maintenance regime.
Consequently, our over cautious authority, asked the Yakovlev Design
Bureau, (who had no real interest in the machine after the collapse of
communism, other than as a useful income stream from rich westerners) to
come up with a "life extension" scheme. This has involved, at great
expense, removing the wings, tail unit and engine bearers for full NDT
inspection - every 100 hours!
So far, to my knowledge, apart from a spar bracket crack on my machine,
which was put down t a manufacturing defect, no significant findings have
been found across the UK fleet of 21 airframes. I know that the aircraft
are operated safely worldwide on much more enlightened airworthiness
rules, and I want to tap into that experience.
I, and some other owners have been trying to get the Authority to
increase the time between these over cautious inspections and also to
extend the next "interim life" limit of 600 hours. To this end a body of
evidence proving the durability of this wonderful aircraft would be very
useful in pressing our case to the feds.
To this end, could i ask 2 minutes of your time to briefly list the
following:
Country of residence:
A/c Registration:
Serial:
Type of Airworthiness Regime/Lifetime/Inspection period:
G limits allowed:
Crucially, total hours (approx) at January 2014:
Any significant structural/system problems encountered over the life of
the airframe.
Either post on the forum, or email off list. will collate the data and
publish to all when I have a decent data set.
Thanks in advance,
Mark and the UK Aerostars team.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=418109#418109
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aerostar6
Joined: 26 Jun 2008
Posts: 33
Location: Amersham, UK
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| Posted: Wed Feb 05, 2014 4:08 am Post subject: Re: Worldwide YAK 50 survey |
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Thanks Jan. I agree, Spitfires, Mustangs and the rest are now 70 years old, were built with a forseeable life of about 6 weeks, and they are still flying with "on condition" maintenance. Can't see the difference.
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aerostar6
Joined: 26 Jun 2008
Posts: 33
Location: Amersham, UK
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| Posted: Wed Feb 05, 2014 4:15 am Post subject: Re: Worldwide YAK 50 survey |
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Jan, what restrictions do you have about flying outside french airspace? Is it written permission, as it is for us now?
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jan.mevis(at)informavia.b
Guest
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| Posted: Wed Feb 05, 2014 5:07 am Post subject: Worldwide YAK 50 survey |
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Yes, it is exactly the same system: I need a permit for each other country
since it's a national solution.
Consequence of the EASA Annexe II rules.
Usually that is no problem.
BR,
Jan
On 05/02/14 13:15, "aerostar6" <mwlevy(at)btinternet.com> wrote:
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aerostar6
Joined: 26 Jun 2008
Posts: 33
Location: Amersham, UK
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| Posted: Sat Feb 08, 2014 3:28 am Post subject: Re: Worldwide YAK 50 survey |
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Not a great response yet - how about I make it simple?
Anyone out there with 600+ hours on their airframe?
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tigeryak18t
Joined: 26 Sep 2009
Posts: 233
Location: PARIS FRANCE
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| Posted: Sat Feb 08, 2014 6:12 am Post subject: Worldwide YAK 50 survey |
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Yes but Yak18T
Didier Blouzard
+33 6 5184 4802
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_________________
Didier Tiger YAK18T
Member of Commemorative Air Force
French Wing |
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bwade154(at)yahoo.com
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| Posted: Sat Feb 08, 2014 6:28 am Post subject: Worldwide YAK 50 survey |
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If you want to widen your search I've got over 600 hours on my Yak 52. There aren't a lot of Yak 50's in service kind of like the IAR 823.
Bill Wade N4450Y
On Saturday, February 8, 2014 9:20 AM, Didier BLOUZARD <didier.blouzard(at)gmail.com> wrote:
--> Yak-List message posted by: Didier BLOUZARD <didier.blouzard(at)gmail.com (didier.blouzard(at)gmail.com)>
Yes but Yak18T
Didier Blouzard
+33 6 5184 4802
[quote] Le 8 févr. 2014 à 12:28, "aerostar6" <mwlevy(at)btinternet.com (mwlevy(at)btinternet.com)> a écrit :
--> Yak-List message posted by: "aerostar6" <mwlevy(at)btinternet.com (mwlevy(at)btinternet.com)>
Not a great response yet - how about I make it simple?
Anyone out there with 600+ hours on their airframe?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=418341#418341
>
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http://www.matronics.com/Navigator?Yak-List |
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