48 C.F.R. § 209.270-2
As used in this section—
Aviation critical safety item means a part, an assembly, installation equipment, launch equipment, recovery equipment, or support equipment for an aircraft or aviation weapon system if the part, assembly, or equipment contains a characteristic any failure, malfunction, or absence of which could cause—
(3) An uncommanded engine shutdown that jeopardizes safety.
Design control activity—(1) With respect to an aviation critical safety item, means the systems command of a military department that is specifically responsible for ensuring the air worthiness of an aviation system or equipment in which an aviation critical safety item is to be used; and
Ship critical safety item means any ship part, assembly, or support equipment containing a characteristic the failure, malfunction, or absence of which could cause—
[69 FR 55988, Sept. 17, 2004, as amended at 73 FR 1827, Jan. 10, 2008]