The International Cessna^® 170 Association

My mechanic questions the PK screws that hold the bottom cowl and the top cowl to the fuselage on my 52 170B . I have checked in the parts book , and to the best of my understanding , this seems to be original ?????
Is there any history or comments of these PK screws being a problem ?
He is suggesting to change these to machine screws .This would of course mean changing the receivers for the screws as well .
I don't think he is set on this .....? but he is suggesting that PKs may not be that good ? comments ???


John Atkins
CF-HER #20292

Just a couple of questions, where did you find him, and does he shave yet? The screws are original if a little slow to remove if you are in a hurry. Of course putting machine screws in would make it even longer to remove the cowling not to mention the paperwork invloved to get them approved. For what its worth. Brian

John,

Brian is correct. But even more important, ask how your mechanic will get Transport Canada approval for such a change. Lived, worked, and flew there for ten years and I can assure you, dealing with the FAA is a thousand times easier than dealing with Transport Canada on any airworthiness question. Been there, done that, burned the T-shirt.
Chuck

jatkins wrote:My mechanic questions the PK screws that hold the bottom cowl and the top cowl to the fuselage on my 52 170B ....... he is suggesting that PKs may not be that good ? comments ???


John Atkins
CF-HER #20292

He may be right, John. So far they've only held it all together for 53 years.