Loss of separation involving a Piper Aircraft Corp PA-31T2, VH-DXI and Cessna Aircraft Company R182, VH-UOE, Seymour, VIC on 18 December 1994

On departure the pilot of VH-DXI requested climb to amended altitude 10,000. Due to another aircraft just ahead at 8000 feet the controller issued a clearance to climb to amended altitude 7000 feet. On climb the pilot's attention was diverted when a passenger spoke to him. The aircraft had climbed to almost 8000 feet when the controller queried the pilot on his altitude. The pilot apologised and descended back to 7000 feet. The longitudinal separation at the time was four miles, instead of the required five miles. Significant Factor The following factor was considered relevant to the development of the incident: 1. The pilot inadvertently climbed the aircraft above the altitude he was cleared to.