MacDonald and Military Rehabilitation and Compensation Commission (Veterans' entitlements)

This matter came before A. Nikolic Am Csc SM of the Administrative Appeals Tribunal concerning an appeal by SGT Macdonald against a decision of the Military Rehabilitation and Compensation Commission. The dispute centred on SGT Macdonald's claim for a condition of disequilibrium, which she attributed to a simulator incident during her service. The Commission had affirmed its original decision, which SGT Macdonald sought to have set aside.

The primary legal issue before the Tribunal was whether SGT Macdonald had suffered a "service injury" within the meaning of section 27 of the *Military Rehabilitation and Compensation Act 2004* (Cth) arising from the simulator incident. This required the Tribunal to determine if the evidence established a causal link between the incident and her claimed condition, particularly in light of competing medical diagnoses, including noise-induced vestibulocochlear nerve damage and cervicogenic dizziness, and the absence of applicable Statements of Principles for these diagnoses.

The Tribunal's reasoning focused on inconsistencies in SGT Macdonald's evidence and the medical documentation. The Tribunal noted that SGT Macdonald's account of the simulator incident's noise level was inconsistent with her description of a rocket incident, rendering the latter an unreliable benchmark for assessing the simulator's noise. Furthermore, the Tribunal found that SGT Macdonald's medical history, including references to migraines and her repatriation from Afghanistan, contained significant discrepancies. The Tribunal also expressed concern that a key medical expert had provided an opinion without reviewing crucial service medical records. Ultimately, the Tribunal concluded that it was not reasonably satisfied that SGT Macdonald had suffered a service injury from the simulator incident, as the available evidence did not establish a clear causal link between the incident and her symptoms, nor did it definitively identify the underlying cause of her disequilibrium.

Consequently, the Tribunal affirmed the decision under review, finding that SGT Macdonald had not established that her condition constituted a service injury as defined by the Act.