14 days are for homos. I'm all about 28 days - same great wash, but a little extra CC on top. Get your scrubbers out!
Anyway, if you managed to clean all that crap off the tailboom, then you might see all the bucking rivets, and that would lead to "unscheduled maintenance."
Ok I found some pictures of a clean tailboom on an old Huey, just for the naysayers:
edit: Now that I think about it, I think maybe it was only cleaned because civilians came out and put the strakes on the tailboom (which would be why the strakes aren't painted in that picture).
dbledit: Or maybe it was because in Yuma we did our own 14 days (no contractors), and Yuma SAR maintainers are probably like the Force Recon of the Marine Aviation community