"Special" Motor Mount Washers - AD 46-44-05 SLN-18

[7313]

I am looking for four of the "special offset washers" that Cessna sent out to satisfy this AD back in the day. Drawing here: https://www.cessna120-140.org/cgi-bin/members/login.cgi .
Apparently these were lost when I acquired this airplane as a project several years back.

If I can find a source it will save me the time and expense of having them fabricated. Thanks for any help that can be offered.

[6643]

Wait, have you confirmed that your engine mount requires them? Forget about the serial numbers and look at the mount itself.

[7313]

Yes it does. It has the 7/8" tubes where the original internally wrenched bolts nestled into. As I understand it the revision was to have these shoulder washers fit over the ends so that a standard AN6 bolt could be used.

[6597]

Something like this? Sorry can't help on a source....

[6643]

As I understand it the revision was to have these shoulder washers fit over the ends so that a standard AN6 bolt could be used.

Yes, but the logic is to shift the bearing surface from the flat washer in front to the back side of the tube. I'd suggest you go ahead and have the washers made up if you don't find them with your parts.

[7313]

Thanks much for the photo. The washer is very evident - especially since someone was kind enough to mark the edges! The only notable difference between the picture and the drawings in Service Bulletin 18 is the direction of the bolt. I reckon that doesn't really matter much.

Interestingly, it turns out our airplane falls outside of the serial numbers for the AD, so apparently by the time our airplane (Serial 10038) was born the change had been incorporated into production.

Still looking for a source for the washers..................