The International Cessna^® 170 Association

How can I convert my 1950 model a Mixture clip over to a verner mixture control?

Perhaps buy a new vernier-style control cable and install it?

I agree but the question is what kind of paper work does it require to make it legal?

jlong,
buy a PMA'd cable (McFarlin) or such and a 337 will do the trick!
brad

Thanks! I appreciate the information!

I'll have to check my logs to be sure, but I'm fairly sure my AI did mine with a simple logbook entry.

Miles

cessna170bdriver wrote:I'll have to check my logs to be sure, but I'm fairly sure my AI did mine with a simple logbook entry.

Miles

That sounds reasonable. It doesn't sound like a major alteration.

lowNslow wrote:

cessna170bdriver wrote:I'll have to check my logs to be sure, but I'm fairly sure my AI did mine with a simple logbook entry.

Miles

That sounds reasonable. It doesn't sound like a major alteration.

Guys,
It isn't a major alteration but you are changing a slip/stop mechinesm to a verner so you are changing the TC, a 337 can't hurt! just my thoughts!
brad

bradbrady wrote:Guys,
It isn't a major alteration but you are changing a slip/stop mechinesm to a verner so you are changing the TC, a 337 can't hurt! just my thoughts!
brad

Brad, I guess it can't hurt but CAR3 (under which the 170 was certified) states:

"§ 3.627 Power-plant controls. Power-plant
controls shall comply with the provisions of §§
3.384 and 3.759. Controls shall maintain any
necessary position without constant attention by
the flight personnel and shall not tend to creep
due to control loads or vibration. Flexible
controls shall be of an acceptable type. Controls
shall have adequate strength and rigidity to
withstand operating loads without failure or
excessive deflection."

I would think either of the mixture controls mentioned above comply with this.

lowNslow wrote:

bradbrady wrote:Guys,
It isn't a major alteration but you are changing a slip/stop mechinesm to a verner so you are changing the TC, a 337 can't hurt! just my thoughts!
brad

Brad, I guess it can't hurt but CAR3 (under which the 170 was certified) states:

"§ 3.627 Power-plant controls. Power-plant
controls shall comply with the provisions of §§
3.384 and 3.759. Controls shall maintain any
necessary position without constant attention by
the flight personnel and shall not tend to creep
due to control loads or vibration. Flexible
controls shall be of an acceptable type. Controls
shall have adequate strength and rigidity to
withstand operating loads without failure or
excessive deflection."

I would think either of the mixture controls mentioned above comply with this.

Karl,
I'm not disagerning with you, it's just when you change any componet it is worth the 337, just becuse in the 337 you will give the time and date of the alteration if there is an issue down the road with the log books there is a start time to rebuild log books. I do a 337 every chance I get! but of corse I get $50.00 every 337! It still is a good way to go!
brad

You don't do a 337 just because. You do one if it is required, is it a Major?
Is it STC'd? Do a 337. If it isn't and its a major then you need a field approval. If it isn't a major, then its a minor and its a log book entry.

One of the "pet peeves" of the SAT GADO is Form 337's for simple radio additions, etc. They actually frown on unnecessary 337's. If it's not a major alteration or repair as def'd by FAR 43...it's not a 337.

mit and george,
My FSDO wants me to send them everything , Any change to the equpinent list is an alteration! acording to them, I don't disagree! I know we are just splitting hairs But still my last post says what I think! It can't hurt.
brad

MY FSDO is doing what Georges is, don't do it if it ain't needed.

I would suggest that a log book entry would be sufficient. If the fuzz ever questions it, submit a 337. They hardly ever hang anyone for replacing a mixture control cable using a logbook entry only. Even then, they don't hang them very high or very long.