SB 18-02-02 Potential cracking in the horizontal stabilator front spar

[Piper J3]

Not a patch. Patches are for bicycle tires. Aircraft don't do "patches". Correct term is doubler. Look at the bottom of your fuselage and you will see a number of doubler plates in high stress locations. Doublers are used to distribute load safely into the surrounding skin...

[joedallas]

http://hhh.gavilan.edu/hspenner/iLea...uralRepair.pdf

See page 140


The doubler is not a patch there in no damage under it.

It is just a term

My View It is a Patch

Originally Posted by Piper J3

Not a patch. Patches are for bicycle tires. Aircraft don't do "patches". Correct term is doubler. Look at the bottom of your fuselage and you will see a number of doubler plates in high stress locations. Doublers are used to distribute load safely into the surrounding skin...

[Piper J3]

I doubt if I'd do a "wikiHow" even (with pictures) for aircraft repair, but maybe some people would...