Wing Spar AD

[WebMaster]

Steve Weaver used to fly a Skymaster called "Bodacious" on the airshow circuit. Smoke on the rear engine only.

The FAC 337's all have to have the spar inspection before being registered as normal category.

[skymstr02]

The military O-2's have the same requirements that the pure civil aircraft have, that is 3,000 hours for the initial inspections in table 1, note 1, of AD78-08-05. It is not a requirement for civil airworthiness until the times are accumulated.

In my case, my airplane had 2880 hours on it when I had it certified, and it was not due at that time. (Reference Cessna Drawing 10337-065)

[Skymaster337B]

Just to clarify, AD 78-08-05 is for DC-10's. The AD we're talking about is 78-09-05. The way I read the AD is the 3,000 hour inspection is not mandatory...but suggested. But I thought the O-2's required an STC to convert them to an N number. And that STC required the spare inspection every 500 hours regardless of how many hours are on the airframe. Do I understand this right?

Otherwise, a "normal" Skymaster requires the inspection starting at 5,000 hours. And Pressurized Skymasters start that inspection at 10,000 hours.

[skymstr02]

Originally Posted by Skymaster337B

Just to clarify, AD 78-08-05 is for DC-10's. The AD we're talking about is 78-09-05. The way I read the AD is the 3,000 hour inspection is not mandatory...but suggested. But I thought the O-2's required an STC to convert them to an N number. And that STC required the spare inspection every 500 hours regardless of how many hours are on the airframe. Do I understand this right?

Otherwise, a "normal" Skymaster requires the inspection starting at 5,000 hours. And Pressurized Skymasters start that inspection at 10,000 hours.

I transposed the D number wrong. There is no STC required to get a civil certification for an O-2. The type certificate data sheet spells out what is required. There are no additional requirements for the spar inspection than what is specified for any other 337 airplane. Please see the AD and Cessna Service Bulletin for details.

[bill collignon]

anyone aware of civilian skymasters failing the wing spar inspection? Im not aware of any.

[Skymaster337B]

I was reading the spar AD again. I noticed it references the Cessna Multi-Engine Service Letter ME78-2 for some details. Does anyone have a copy of this service letter that they could post?

I have a copy I will post as long as it's ok with the admin.