Helio mods #45 & #48

While mining for info this surfaced.

According to the letterhead this is the Factory procedure for converting a H-391 to an H-395. It's not addressed here but I have been told this conversion also requires the stronger heavy duty 395 flap tracks mentioned in mod #48 and the H-395 stabilator.

I don't suppose their is enough information to legally do a complete conversion that includes the GO-480 or O-540, but it would certainly make the cage stronger.

The first

**8 pages** of Helio conversion no. 45 (mod 45) are missing but the pages have the original Helio Factory letterhead. It also has a DER's signature at the bottom.

Helio Mod #48 isn't on the

**original letterhead** and I was unable to locate any of the part #'s in the "Illustrated Parts Catalog". A picture of c/n 44 mentioned in mod #48, N4120D appears to looks identical to a 395A both have the 2 bladed prop.

According to information I have found c/n

**O47** was probably converted to an H-250 and c/n 073

**was** converted to an H-250 with the O-540, c/n's

**075, 081, 086** were factory coversions to H-395's. I found this statement somewhere (forgot to ref it and now can't find where)

**c/n 070 and up can be safely converted to GO-480 or O-540**. I assume this statement also included Helio mod #45 and the stronger flaps & stabilator

I suspect their are Helio Factory Mods 1 through 47 out here some where. I would like to see them no matter how trivial they may appear to be.

If any one has anything to add to this it would be greatly appreciated.

Edit; found ref to H-295 induction system (STC SA1432WE) for Helio Mod #48Doug