The International Cessna^® 170 Association

Hi all—

Does anyone know the part # on Aircraft Spruce for this hardware?

The Cessna parts catalog lists them as PK76XZ-8-10 & 0311001-27 but I can't find them on Aircraft Spruce.

Items 32 & 40

Cessna’s IPC is not designed to interpret Aircraft Spruce’s Item numbers. That PK part is a Number 8 screw1” long with a pan head. Go find an AN or MS screw with those specs. The other is a flat washer.

https://www.aircraftspruce.com/menus/ha ... crews.html

Sometimes you need to get creative, these are old aircraft. When I googled to get the part numbers I got S350 as a replacement for the washer. But I could not find that for sale either.

When I googled the screw one of the responses was a thread on here that discussed the use of sheet metal screws, and the washers to use (though I prefer the idea of a metal and rubber replacement to a simple nylon washer).
viewtopic.php?f=2&t=6971

Your AME should be able to source functional replacements for these parts, and things that follow acceptable practice which he will sign off.

daedaluscan wrote:Sometimes you need to get creative, these are old aircraft. When I googled to get the part numbers I got S350 as a replacement for the washer. But I could not find that for sale either.
....

When part numbers are superceded...and then reassigned to a different part... an old flat washer PN used 60 years ago may now be assigned to a fuel pump mfr’d last year, etc. This is why Manual Revisions are made...and why 60-year old UN-approved “catalogs” are not to be used for maintenance.

When part numbers are superceded...and then reassigned to a different part... an old flat washer PN used 60 years ago may now be assigned to a fuel pump mfr’d last year, etc. This is why Manual Revisions are made...and why 60-year old UN-approved “catalogs” are not to be used for maintenance.

Where does one find the new manual revisions?

reecewallace wrote:

When part numbers are superceded...and then reassigned to a different part... an old flat washer PN used 60 years ago may now be assigned to a fuel pump mfr’d last year, etc. This is why Manual Revisions are made...and why 60-year old UN-approved “catalogs” are not to be used for maintenance.

Where does one find the new manual revisions?

Very simply...if you’re viewing a 60-year old Cessna catalog...then there’s little reason to expect the info to be current... so Cessna (Textron now) should be contacted, if you want current information.
One way to do this On Line...is via one of the Cessna distributors such as Hill Aircraft, in Atlanta GA who is one of our supporters and gives us a 10% discount on parts ordered thru them... http://www.cessnaparts.com/

GAHorn wrote:Cessna’s IPC is not designed to interpret Aircraft Spruce’s Item numbers. That PK part is a Number 8 screw1” long with a pan head. Go find an AN or MS screw with those specs. The other is a flat washer.

https://www.aircraftspruce.com/menus/ha ... crews.html

If you try replacing those 8 PK screws with 1" long screw you will have 8 new puncture holes in your tank. From the top of the tank cover to the top of the tank is 3/4". The "10" at the end of p/n PK76XZ-8-10 indicates how long the screw is in 16ths of an inch. 10/16" = 5/8". If you want to use a stainless screw try this one from Aircraft Spruce. Do NOT use "type A" screws which are the pointy ones.

Regarding p/n 0311001-27, it is not "a flat washer". It was originally a cork washer used also in such places as the center strap screws, overhead speaker attach, and dome light attach. The early C-180/182 IPC indicates it is cork:. As Reece found S350 is the superseded p/n. Google it to find where to buy it.

n2582d wrote:

GAHorn wrote:Cessna’s IPC is not designed to interpret Aircraft Spruce’s Item numbers. That PK part is a Number 8 screw1” long with a pan head. Go find an AN or MS screw with those specs. The other is a flat washer.

https://www.aircraftspruce.com/menus/ha ... crews.html

If you try replacing those 8 PK screws with 1" long screw you will have 8 new puncture holes in your tank. From the top of the tank cover to the top of the tank is 3/4". The "10" at the end of p/n PK76XZ-8-10 indicates how long the screw is in 16ths of an inch. 10/16" = 5/8". If you want to use a stainless screw try this one from Aircraft Spruce. Do NOT use "type A" screws which are the pointy ones.

Regarding p/n 0311001-27, it is not "a flat washer". It was originally a cork washer used also in such places as the center strap screws, overhead speaker attach, and dome light attach. The early C-180/182 IPC indicates it is cork:

Screen Shot 2021-01-07 at 9.09.00 AM.png

. As Reece found S350 is the superseded p/n. Google it to find where to buy it.

Thanks for the “catch” Gary... bran pharrtt....

Your IPC is out of date as well... the washer, PN 0311001-27 has been superceded to PN S350, available from Hill Aircraft for $1.28 each (discounted price is $1.02) 1-800-998-7832