The reporting of aviation safety occurrences enables the Australian Transport Safety Bureau (ATSB) to investigate accidents and serious incidents and monitor safety through the analysis of any trends. On 1 July 2003 the Transport Safety Investigation Act 2003 came into effect, introducing the terms immediately reportable and routine reportable matters (IRMs and RRMs, respectively). This report examines trends in IRMs that involved regular public transport operations and provides a context for interpreting any changes over time. The aim is to inform the aviation community of any important…

Executive Summary The partial wreckage of a Cessna 206 aircraft was recovered from an area in the Gulf of Carpentaria, near where an aircraft of this type disappeared on 24-November 1999 (ATSB Occurrence number 199905562). Photographs and video footage of the wreckage were supplied to the ATSB and reviewed with a view to gathering further detail regarding the accident. The ATSB bsubsequently requested that the propeller and attitude indicator instrument from the aircraft be shipped to the bureau's Canberra laboratories for further study and analysis. On the basis of damage to several aircraft…

The ATSB carried out a safety deficiency investigation in accordance with powers under section 19CB (1) (d) of the Air Navigation Act 1920. SAFETY DEFICIENCY An allegation was made to the ATSB that Australian registered Boeing 747-300 aircraft operating from Bangkok airport in Thailand were failing to meet take-off performance requirements. A 'specified' flight was cited as demonstrating that the aircraft had not complied. Comprehensive analysis of data from the 'specified' flight, as well as data from other flights departing Bangkok under similar conditions, was undertaken. Documentation…

This report was tabled in the Australian Parliament on 23 November 1999 Class G airspace (or uncontrolled airspace) has the lowest level of service and the fewest restrictions on aircraft operations. In Australian Class G airspace, third-party directed traffic information is provided to pilots of aircraft operating under the instrument flight rules. There have been a number of attempts to change the operation of Class G airspace since its introduction in 1995. As part of the Airspace 2000 program, the Civil Aviation Safety Authority (CASA) decided to conduct a 'Class G demonstration'…

Reciprocating-engine powered low-capacity transport aircraft (8 to 10 passengers) provide an important public transport connection throughout regional Australia. In the period January 2000 to December 2005, twenty powertrain structural failures of high-power (300 to 375 brake horsepower) horizontally-opposed, reciprocating engines were associated with air safety occurrences reported to the ATSB. These occurrences ranged in severity from; in-flight engine shutdown; engine failure and forced landing; engine failure combined with in-flight fire and fracture of both upper engine mounts; to the…

The purpose of this publication is to provide a national overview of serious non-fatal injury in Australia due to transport accidents involving a railway train in the period 1999-00 to 2003-04, including level crossing accidents. The definition of transport injury used in this report excludes injuries given an external cause of intentional self harm, assault or undetermined intent (terms that are defined in the report). This report includes all injuries that were serious enough to require hospitalisation but did not result in death. Publication available from the Australian Institute of…

This study provides an overview of accidents involving private aircraft operations between 2001and 2005. With approximately 400,000 flying hours conducted annually, private flying accounts for around a quarter of general aviation activity. Within private operations, rotary-wing activitynow contributes about 10 per cent of all hours flown. The accident rate in private aviation activities generally declined over the five-year study period, but the fatal accident rate for fixed-wing aircraft remained generally stable. There was an apparent increase in the rotary-wing fatal accident rate. The…

Spatial disorientation (SD) is among the most common factors contributing to aviation accidents and incidents, but its true prevalence is difficult to establish. This is because many accidents where SD is cited as a likely factor are fatal, and therefore its role cannot be known with any certainty, but also because in the many instances of SD where an accident doesn't result, it goes unreported. This study provides a comprehensive explanation of the various types of SD in the aviation environment, and suggest strategies for managing the risk associated with SD events. This report provides an…

Incapacitation of a pilot due to the effects of a medical condition or a physiological impairment represents a serious potential threat to flight safety. The purpose of this research project was to investigate the prevalence, type, nature and significance of in-flight medical conditions and incapacitation events occurring in civil aviation. A search of the Australian Transport Safety Bureau's accident and incident database was conducted for medical conditions and incapacitation events between 1 January 1975 and 31 March 2006. There were 98 occurrences in which the pilot of the aircraft was…

Controlled flight into terrain (CFIT) has been identified as one of 'aviation's historic killers', claiming the lives of more than 35,000 people since the emergence of civil aviation in the 1920s. The purpose of this report was to provide an overview of CFIT from an international perspective, to examine current and potential CFIT preventative strategies, and to specifically identify those characteristics associated with CFIT in Australia. A search of the Australian Transport Safety Bureau's (ATSB) aviation safety database identified 25 CFIT accidents and two CFIT incidents in the period 1996…