Description of Tool Usage:

The A77003-18 test equipment is used on airplanes equipped with JT9D-7R4D and JT9D-7R4E engines. A77003 is used to test the exhaust gas temperature (EGT) indicating system. A77003-18 consists of an A77003-29 test box assembly and an A77003-36 adaptercable assembly, both contained in a storage box.