Can Anyone Identify These Strips?

[Skymaster337B]

I wonder if this will be a requirement for all 337's in the future, in the form of an AD? Spare strap AD's seem to be the FAA solution to keeping 50+ year old airplanes in the air. Just a thought, since there's no economic solution for new wings.

[JGug1]

I spoke with the manufacturer of the Flint Tanks. He said that there is a "weak" point in the models made before '74 (?). If tip tanks are put on later models, they are not required. He also said that the '73's do have a "weakness" at that point but that Cessna had not found it problematic and requiring a fix. To clarify, the tip tanks make the wing more vulnerable in the earlier models. Apparently not so in the later models. 337's were found plenty strong in Vietnam.

[skymstr02]

Originally Posted by Skymaster337B

I wonder if this will be a requirement for all 337's in the future, in the form of an AD? Spare strap AD's seem to be the FAA solution to keeping 50+ year old airplanes in the air. Just a thought, since there's no economic solution for new wings.

Typically the spar straps go on the lower surface to be in tension vs. the upper surface (compression).