Senator Chris Evans: The Minister for Defence has provided the following answer to the honourable senator's question: (1) On the 8 June 2011 the Prime Minister flew from Darwin to Gove and returned to Darwin on a Special Purpose Aircraft. The Prime Minister was in Gove on Government business. (2) Two Challenger aircraft were used on the Darwin to Gove leg and one Challenger was used to return to Darwin. Normally a task with more than nine passengers would be conducted on a Boeing Business Jet but one was away on an overseas task and the other was not available due to periodic maintenance requirements. (3) The first aircraft was on the tarmac at Gove for approximately six (6) hours and 57 minutes the second aircraft was on the tarmac at Gove for approximately five (5) hours and 11 minutes. (4) Normally on arrival, the engines are shut down within 30 seconds of reaching the parking position. On departure, the engines are running from between five to ten minutes before take-off. The aircrew involved in the Darwin/Gove task on 8 June 2011 have advised that engine operating times followed normal procedures.