Patent ID: 8979442
Filing Date: 2015-03-17
Classification: B23P,F01D,Y10T

Abstract:
1. A system for modifying a gas turbine engine in the field, the system comprising: a stand configured to receive, support, and position a turbine rotor disk removed from the gas turbine engine, the turbine rotor disk made from a superalloy; a drill having a single drill axis; a drill guide including a plurality of radial access holes; a drill mount configured to mechanically couple the drill to the drill guide and to position the drill during drilling operations, the drill mount including a nose piece alignment bushing attached to the drill mount, the nose piece alignment bushing including a bushing interface that interfaces with the plurality of radial access holes to coordinate the single drill axis with a plurality of radial axes associated with the turbine rotor disk such that the single drill axis is prevented from departing one of the plurality of radial axes beyond design tolerances associated with a modification to be performed when drilling has been initiated.