If you have selected

The search retrieves

Part #

All aircraft models, aircraft, parts and components (NHA part # and NHA serial #) to which the part is effective/conditionally effective/not effective.

Aircraft Model

All parts effective/conditionally effective/not effective to the aircraft model.

Aircraft Reg #

All parts effective/conditionally effective/not effective to the aircraft.

NHA Part #

All parts effective/conditionally effective/not effective to the NHA part.

NHA Part # and NHA Serial #

All parts effective/conditionally effective/not effective to the component identified with the NHA part # and NHA serial #.