L 13 A Blaník's can fly again

[StaPo]

but only variant L 13 A or equivalent (having reinforced wing spar),
and also when compliant with some additional limitations,
see amended/new EASA AD at http://ad.easa.europa.eu/blob/easa_ad_2011_0135.pdf/AD_2011-0135_1

[aerodyne]

This is good news. However, the hardest part for most will be getting
buy in from th Mfg if you have no records of aerobatic flight.

Another no-go will be if you cannot conform the wing. In
certification speak, you must have the original structure and/or
repairs to the letter of the MM and accurate records to substantiate
said conformance.

If you are like the majority and have repairs anywhere in the wing
with non factory rivets, you are not in conformance. So many have not
noticed that the Blanik rivets have a different geometry/strength
compared to the Std US versions (NASM20426/NAS1097 ect). If the holes
are not oversize, you might replace them with the correct hardware.
You are allowed to use substitute sheet metal and and fittings as
provided for in the O/H manual.

However, major repairs will probably not be economical to redo.

aerodyne

[mattm[_2_]]

On Jul 20, 6:34*pm, aerodyne > wrote:
> This is good news. However, the hardest part for most will be getting
> buy in from th Mfg if you have no records of aerobatic flight.
>
> Another no-go will be if you cannot conform the wing. *In
> certification speak, you must have the original structure and/or
> repairs to the letter of the MM and accurate records to substantiate
> said conformance.
>
> If you are like the majority and have repairs anywhere in the wing
> with non factory rivets, you are not in conformance. *So many have not
> noticed that the Blanik rivets have a different geometry/strength
> compared to the Std US versions (NASM20426/NAS1097 ect). *If the holes
> are not oversize, you might replace them with the correct hardware.
> You are allowed to use substitute sheet metal and and fittings as
> provided for in the O/H manual.
>
> However, major repairs will probably not be economical to redo.
>
> aerodyne

I also noticed that there's a 2500hr life limit on dual flying. Our
L13
spent most of its time flying with a student and instructor on board;
it may already be close to that limit. I'm not positive we could even
figure it out anymore.

-- Matt

[ContestID67[_2_]]

Another link to review: http://www.aircraftdc.de/ENG/visionen_blanik.htm

Questions

- Is an European solution valid in the US? Or do we need to wait for
the FAA to weigh in?
- What is the estimate cost of the EASA AD? (baring any additional
rework beyond the AD needs)

http://ad.easa.europa.eu/blob/easa_ad_2011_0135.pdf/AD_2011-0135_1

Signed,
We-Have-Two-L-13's-Gathering-Dust-and-what-is-the-scrap-value-of-
aluminum?

[Frank Whiteley]

On Jul 21, 10:26*am, ContestID67 > wrote:
> Another link to review:http://www.aircraftdc.de/ENG/visionen_blanik.htm
>
> Questions
>
> - Is an European solution valid in the US? *Or do we need to wait for
> the FAA to weigh in?
> - What is the estimate cost of the EASA AD? *(baring any additional
> rework beyond the AD needs)
>
> http://ad.easa.europa.eu/blob/easa_ad_2011_0135.pdf/AD_2011-0135_1
>
> Signed,
> We-Have-Two-L-13's-Gathering-Dust-and-what-is-the-scrap-value-of-
> aluminum?

If some are not returned to service, perhaps a few can find display
space in various venues. Others might make interesting simulators, as
York Soaring developed a few years ago. It was used a public
displays, for student training, and CFI-G reviews and scenarios with
several instructors observing. No idea what the current status of
that project is.

Frank

[Mike[_28_]]

From the AD regarding ratios/flight hours

"If the sailplane records are inconclusive, or if any of the types of
operation exceeds the maximum limit, contact the TC holder for
approved instructions and accomplish those instructions accordingly."


What might these "approved instructions" be? Has anybody contacted the
TC holder yet?

[Bill D]

On Jul 21, 1:17*pm, Frank Whiteley > wrote:
> On Jul 21, 10:26*am, ContestID67 > wrote:
>
> > Another link to review:http://www.aircraftdc.de/ENG/visionen_blanik.htm
>
> > Questions
>
> > - Is an European solution valid in the US? *Or do we need to wait for
> > the FAA to weigh in?
> > - What is the estimate cost of the EASA AD? *(baring any additional
> > rework beyond the AD needs)
>
> >http://ad.easa.europa.eu/blob/easa_ad_2011_0135.pdf/AD_2011-0135_1
>
> > Signed,
> > We-Have-Two-L-13's-Gathering-Dust-and-what-is-the-scrap-value-of-
> > aluminum?
>
> If some are not returned to service, perhaps a few can find display
> space in various venues. *Others might make interesting simulators, as
> York Soaring developed a few years ago. *It was used a public
> displays, for student training, and CFI-G reviews and scenarios with
> several instructors observing. *No idea what the current status of
> that project is.
>
> Frank

Fantastic proposal!