• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction). Annual membership also comes with two BiplaneForum.com decals.



Does AD 84-13-05 Apply Here?

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

cwilliamrose

‍‍‍‍‍‍‍‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ 
Lifetime Supporter
Joined
Nov 10, 2009
Messages
10,574
Reaction score
3,287
Location
SW Florida (94FL)
There's an S-2A for sale that has a 'new' crankshaft installed in 1985 -- after the AD note was published. The replacement crankshaft was sourced from Lycoming. The owner claims the AD does not apply since the replacement part was sold after the AD per a direct statement by Lycoming. But the replacement crankshaft still has the lightening holes and is not the solid flange that I thought was theonly fix that avoided the recurring inspection. Was there an interim part that satisfied the AD but still has the lightening holes?
 

Latest posts

Back
Top