That is not the job you're looking for. I was a 6173 with secondaries of 6113 and 6177. I attended WTCCI in Yuma to get the 6177 mos and it looks like 7277 is also some type of advanced aviation weapons instructor designation. It may be the instructors that train the WTCCI students. After graduation the students become instructors back in their respective squadrons.

USMC 1997-2002. 6173 CH-53D Sea Stallion Helicopter Crew Chief and Flightline Mechanic. Semper Fi!

"Be still, Taggart!"