army mos 15D aircraft powertrain mechanic, 15d promotion cut off

Army MOS 15D Aircraft Power Train  Repairer          

Army missions depend on aircraft for transport, patrol and
flight training. It’s up to the members of the aircraft repair
team to ensure that all Army aircraft remain safe and ready to
fly. As an integral member of this team, the Aircraft
Powertrain Repairer inspects, services and repairs Army
helicopters and airplanes.

The Aircraft Power train Repairer is primarily responsible for
supervising, inspecting and performing maintenance on
aircraft powertrain systems.

Some of your duties as an Aircraft Powertrain Repairer may