A second man has been charged and will face court after allegedly trespassing on an aircraft at Lismore Airport last month.
Police said the three males allegedly entered the airport on Bruxner Highway unauthorised, before entering a parked aircraft, about 4am on Sunday 27 September.
The males then left the scene empty handed.
Police said aviation authorities detected the incident and contacted them the next day.
The privately-owned aircraft was not damaged.
Richmond Local Area Command attended and a crime scene was established.
Following inquiries, a 19-year-old man attended Lismore police station where he was arrested and charged on Wednesday 7 October 2015.
About 1.30pm today (Monday 26 October 2015), a 21-year-old man attended Katoomba Police Station where he was arrested.
The man has been charged with interference with an aircraft under the Civil Aviation Act 1988, and enter and remain within a prohibited area of an aerodrome.
He was granted conditional bail will appear at Katoomba Local Court on 30 November.
Police said further arrests were expected.