STA or AD on removal of sound dempering material on 67Bs

[DrDave]

After you clean everything it's a good idea to carefully rinse the areas where you've cleaned. You want to be as gentle as you can. Here's how I did it.

Dave

https://youtu.be/kbOyOf4A8EM

This is exactly how interior of my C337B is currently, it's all gutted and I even took more out of it to it's bare bones. There are no instruments or radios , yokes in the cockpit, just wires, cables, couple old heat ducting hoses, mechanisms for yokes and trimming dials. All my floor panels will be replaced as they all are corroded but it looks as inside the belly is still pretty good yet full of dirt n grime from sitting out in elements for last 12-15 years..


AP-AVM

[DrDave]

If you are gutted down to the bare bones I would really make an effort to get in there with the corrosion treatment and a hot water pressure washer in the whole thing. It will pay dividends for years to come. I'm sure you can rent the things too.

Dave

[Skymaster337B]

I like the way a good pressure washing looks, but I don't remember anything during my formal A&P training about pressure washing. I never read anything in the maintenance manual or the old AC 65-15 about pressure washing. I'm not judging, but I'm curious about tech data for cumulative fatigue on aluminum during a pressure wash....I'm sure it's dependent upon pressure, metal thickness, area, etc. Not to mention, that not all Skymasters are equal...pre 1973 used thinner aluminum. Looking for a discussion, not a shooting match.