Is that a local code? Neither of the A&P's I use have sprinklers,
and they run legit businesses that do major repairs.

As far as I know, NC fire code. Could be that an older building is
grandfathered in, but to build new, there was no doubt that there would
have to be sprinklers.

I've never even *seen* a sprinkler system in a maintenance hangar.

Not once, in Wisconsin or Iowa.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"