Trying to grasp the AD for wing spars

[hharney]

The SID development by Cessna was a proactive approach on their part. It all comes from Congress passing the Aging Aircraft Bill. This document is primarily pointing to the airliners but will eventually catch up to all aircraft. Cessna is just getting ahead of the game you might say.

Bottom line is liability. Cessna never intended that their aircraft should still be flying 50 years after construction. They really don't care about selling parts for the old ones either otherwise they would make the parts. They would in my opinion rather see the aircraft retired. They would like to sell you a new one.

Personally I think we can learn a lot from the SID's. They do identify key areas to inspect and be aware of potential weaknesses of our aircraft. Use them as guides and they may make some sense. I would suggest that everyone that owns a Skymaster buy a copy of the SID's to use along with the service manual. They are available from Cessna through companies like Yingling Aircraft.