At 3.15pm on Friday, emergency services including NSW ambulance were alerted that a small two-seater Jabiru aircraft was forced to make an emergency landing in a national park south of Camden. 

Emergency services searched for the plane and found it in the Nattai Conservation Park.

They pulled up two men in their 20s from the bushland. Neither were seriously injured. 

The plane is partly submerged in a river in the national park.

Police spoke to the men at Bankstown Airport where they were taken to after they were winched up. 

A NSW Ambulance spokeswoman confirmed the two men were then driven to Liverpool Hospital as a precaution.

Recreational Aviation Australia which works under supervision from the Civil Aviation Safety Authority (CASA), registers aircraft, accredit flying schools and certificate pilots, confirmed the plane was registered with them.

Recreational Aviation Australia's chief executive, Michael Linke said the pilot followed all emergency actions he was trained to enact.

"The pilot called a Mayday over the radio, and activated a Personal Locating Beacon (PLB), enabling emergency rescue to easily locate the aircraft in bushland," he said. 

"Recreational Aviation Australia recommends all pilots carry a beacon and activate it if an emergency occurs." 

The Recreational Aviation Australia will be conducting an investigation into the crash.