Final answer:
Reinforcing the cracked aileron control bracket is a procedure conducted by an airframe mechanic to restore an aircraft to an airworthy condition.
Step-by-step explanation:
Reinforcing the cracked aileron control bracket of an aircraft by a certificated airframe mechanic is a procedure that falls under the subject of Engineering. The aileron control bracket is an important component of the aircraft's control system, and any damage can compromise its ability to operate correctly. By reinforcing the bracket, the airframe mechanic ensures the structural integrity of the aircraft, allowing it to return to an airworthy condition.