Hi All

I do a lot of work for airlines and I have a DAR (Designated Airworthiness Representative) friend that I have worked with for a number of years.  We have talked about my ES project naturally and he has made a number of suggestions to assist in certification.  One suggestion was that I should write a maintenance manual for the plane that specifies how I do things like bonds and prepping the surface, that sort of thing.  Some have said it's a bit over the top but others think it's a good idea.  My buddy worked at Boeing for many years so of course his perspective is to document everything. I don't mind since it's part of what we've had to do for our installations in the airline's planes.  Basically it gives the FAA (and insurance company and prospective buyer when I decide to sell it) a document telling how it was put together and what standards I used.  Anyway, one of the things suggested by my buddy was to calibrate the torque wrenches.  There are companies that do that but I was wondering if any one out there has done it, what it costs and if anyone thinks it's worth it?

Dan Newland
ES #61