ASN logo
ASN Wikibase Occurrence # 157
Last updated: 2 December 2021
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information. If you feel this information is incomplete or incorrect, you can submit corrected information.

Time:09:20 EuST
Type:Silhouette image of generic AT8T model; specific model in this crash may look slightly different
Air Tractor AT-802
Owner/operator:Col Pay
Registration: VH-LIS
MSN: 802-0082
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:Liddell (ALA), NSW -   Australia
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Departure airport:Scone, NSW
Destination airport:Scone, NSW
Investigating agency: ATSB
On 7 December 2007, the pilot of an Air Tractor Inc. AT-802 aircraft, registered VH-LIS, was conducting a test flight at Lake Liddell, NSW. The purpose of the flight was to test an experimental in-flight water collection system using skis attached to the aircrafts main landing gear.

At about 0910 Eastern Daylight-saving Time, the pilot was conducting the second test run of the day. After the aircraft skis had been in contact with the surface of the lake for 36 seconds, witnesses observed the aircraft pitching nose down, about its right main landing gear while rotating to the right. The aircraft then overturned and sank. The aircraft was substantially damaged and the pilot was fatally injured.

The investigation concluded that the right experimental ski breached the surface of the water which caused a substantial amount of drag to act on the right side of the aircraft, as a consequence, the aircraft became uncontrollable. The circumstances of this accident highlight the need for due diligence and detailed risk assessments to be performed as part of experimental test programs.

As a result of this incident, the Civil Aviation Safety Authority (CASA) has proposed amendments to Advisory Circular 21-10 - Experimental Certificates to provide:

* updated guidance information to persons applying for the issue of experimental certificates
* advice on risk management for test pilots during experimental flight testing.

In addition, the Australian Transport Safety Bureau (ATSB) issued a safety recommendation to CASA in respect of the need to consider the safety of third parties, including on the ground or water, before issuing a Special Certificate of Airworthiness.


Safety recommendations:

Safety recommendation AO-2007-066-SR-081 issued 25 June 2009 by ATSB to CASA


Photo of VH-LIS courtesy

Scone (YSCO / NSO)
19 November 2015; (c) Ian McDonell

Revision history:

21-Jan-2008 10:00 ASN archive Added
25-Jan-2008 22:10 Andrew Whitton Updated
24-Jun-2009 23:47 harro Updated
02-Dec-2010 13:39 Anon. Updated [Operator]

Corrections or additions? ... Edit this accident description