Chapter 8 Engine Removal  and Replacement Introduction Procedures for removing or installing an aircraft engine  usually vary widely with the type of aircraft and the type of  engine. Thus, no single list of instructions can be provided  as a guideline for all engines. Because of the many types  of engine and aircraft installations and the large number of  design variations within each type or category, representative  examples have been selected to illustrate the most typical  installation procedures for reciprocating, turboprop, and  turbofan engines. There are some common tasks that  must be accomplished when replacing an aircraft engine.  Most engines require disconnecting and reconnecting  electrical, hydraulic, fuel supply, intake and exhaust air  path components, engine controls, and engine mounting  connections to the airframe. 