a picture would/should help others understand,
which might bring better help with your issue.
the interior/exterior 110/ac outlets vary a bit
but most of the 2000s share similar versions...
these appear 2b the ones used on your unit...
i think the blue/highlighted number is the one in question.
the online parts manual has this info, it's a good download to have.
Airstream, Inc :: Parts Manuals
many years overlap and some info is either too general or wrong,
but the parts books are a good place to start.
often a glimpse of the installation is included too.
without a close up of this specific outlet, here is a general approach...
the outlet has a dried bead of acryl-r at the perimeter (ignore the gasket for now).
this works to keep water/moisture out of the main hole and shell wall.
in order to removed the outlet, you will need to cut
start by masking (the shell) all around to reduce nicking or skin/clearcoat damage...
then using a SHARP object laid flat/parallel to the skin, cut into the sealant...
it should be 2-3 mm thick at most.
once the sealant edging has been released, removal is pretty simple.
once the replacement is wired and screwed to the shell,
the sealant bead will need to be REapplied (after removing the old stuff)
all the typical electrical repair CAUTIONS apply during removal and replacement.
any a/s dealer service center can order this part.
some dealers may have these in stock, out of doors mart
has a pretty good inventory of parts listed ONLINE...
while a/s will have these (or similar replacements) in the factory/parts store,
they don't generally sell directly 2 customers (unless U r in the store in person)
one may be able to find it other places or substitute another exterior grade outlet...