Anti-rotation tool for aircraft engine rotational equipment

A system for preventing rotation of a first rotational equipment component of an aircraft engine, the system comprising:

• the first rotational equipment component mounted for rotation about a rotational axis;
• a second rotational equipment component mounted on the first rotational equipment component, the second rotational equipment component axially adjacent the first rotational equipment component, the second rotational equipment component mounted to the first rotational equipment component by a plurality of mechanical fasteners to form a rotational assembly of the first rotational equipment component and the second rotational equipment component;
• and
• an anti-rotation tool including a shaft and a head, the shaft extending along a shaft axis between and to a proximal shaft end and a distal shaft end, the head fixedly coupled with the rotational assembly with the shaft axis oriented orthogonal to the rotational axis, the shaft rotationally fixed relative to the rotational axis.

A method for applying a counter moment force to a freely-rotatable component installed on an aircraft engine while installing or removing a threaded mechanical fastener from the freely-rotatable component, the method comprising:

• installing an anti-rotation tool on the freely-rotatable component rotatable about a rotational axis with a head of the anti-rotation tool fixedly coupled with the freely-rotatable component;
• rotationally fixing the anti-rotation tool relative to the rotational axis by positionally fixing a shaft of the anti-rotation tool connected to the head;
• and
• applying a counter moment force to the freely-rotatable component with the anti-rotation tool, rotationally fixed relative to the rotational axis, while installing or removing the threaded mechanical fastener from the freely-rotatable component by rotating the threaded mechanical fastener about a fastener axis substantially parallel to the rotational axis, the fastener axis radially outward of the rotational axis, wherein the freely-rotatable component is an engine shaft of the aircraft engine.