Patent ID: 8683670

Claim:
A method for partial disassembly of a bypass turbofan engine wherein the longitudinal axis of said bypass turbofan engine remains generally horizontal comprising the steps of: connecting a first end of a low pressure turbine module horizontal removal tool to an aft end of a low pressure turbine module; attaching a second end of said low pressure turbine module horizontal removal tool to a lift, said connection being generally above the center of gravity of said low pressure turbine module and said low pressure turbine module horizontal removal tool; adjusting the upward force applied by said lift to counteract the force of gravity on said low pressure turbine module and said connected low pressure turbine module horizontal removal tool; applying a generally horizontal force to said low pressure turbine module to separate it from said engine; disengaging a bearing nut by positioning an extended bearing nut tool over a low pressure turbine shaft, said bearing nut tool engaging notches in said bearing nut and notches in a seal plate to impart a disengaging torque to said bearing nut; positioning a measuring bridge adjacent the aft end of said bypass turbofan engine to be disassembled, said measuring bridge positioned adjacent said low pressure turbine shaft, said measuring bridge providing a stable datum from which measurements may be taken; pulling a bearing by placing an extended bearing pulling tool around said low pressure turbine shaft, said extended bearing pulling tool applying a disengaging generally horizontal force to said bearing when said extended bearing pulling tool applies an opposing generally horizontal force to said low pressure turbine shaft; and stretching a high pressure turbine shaft by placing an extended high pressure turbine shaft stretching tooling around said low pressure turbine shaft, a first portion of said extended high pressure turbine shaft stretching tool engaging said high pressure turbine shaft, a second portion of said extended high pressure turbine shaft stretching tooling engaging said seal plate, said extended high pressure turbine shaft stretching tooling transferring opposing generally horizontal forces to said high pressure turbine shaft and said seal plate to stretch said high pressure turbine shaft.