1. A computer-implemented method for evaluating alignment of aircraft rotor blades via a collective condition, while the aircraft is on the ground, the method comprising: determining, by a computer processor, an air density altitude based on a location of the aircraft; determining, by the computer processor, a torque value for each engine of the aircraft, while the aircraft rotor blades are operated at a normal speed and the rotor blades are set to a full down position via a collective controller; evaluating, by the computer processor, the collective condition of the aircraft rotor blades by comparing the torque value to at least one predetermined flat pitch torque alignment limit for the air density altitude; and providing, by the computer processor, an indication of the collective condition.