what is "the skin is pocketed above lap joint"?

[zhangtl]

In boeing 737cl srm 53-00-01 allowable damage1,
notes Y, it says "if the skin is pocketed above the lap joint,......" I don't sure the meaning of "pocket",and what is the "pocketed skin" above the lap joint?
what is "the skin is not pocketed above the lap joint?

 

[SWComposites]

what specific 737 model?
what page #?
what date of SRM version?

"pocketed" skin probably refers to a bay with reduced thickness skin

 

[zhangtl]

thankS for SWComposites' reply!
737-300
PAGE 103
SRM version is 88
Maybe pocketed skin is chem-milled skin!
I think.

 

[SWComposites]

Strange, but SRM 737-300, 53-00-01, 101, Fuselage Skin Allowable Damage, page 103, dated 10 Jan 1994, does not have notes [X] or [Y]

 

[zhangtl]

Your SRM should be out of date
The newest version is 88,
Page 103 dated Mar 10/2006
See attechment for detailed information.

 

[SWComposites]

Sorry, thought you meant 1988 version.

"Pocket" must refer to a (probably rectangular) reduced thickness area in the skin (formed either by chem or mechanical milling).

 

[zhangtl]

Thank you very much!

 

[inertia4u]

For those still wondering, "pocketing" is indeed the chem milled pocket of skin (reduced thickness).


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Nert