Abstract
A Royal Australian Navy aviator was diagnosed with a subarachnoid haemorrhage after sudden onset of occipital headache, the result of a small aneurysm of the left posterior inferior cerebellar artery. The aneurysm was surgically wrapped and clipped through a posterior fossa craniotomy, and the patient made a full and uncomplicated recovery. Except in rare cases, subarachnoid haemorrahge and intracranial aneurysms are generally considered to be disqualifying for military aviation. Even with good recovery of neurological functioning, complications such as seizures, risk of rebleeding, and de novo occurrence of other aneurysms are all significant concerns due to the risk of sudden incapacitation. This paper will examine the aeromedical factors particular to this case that influenced a favorable aeromedical decision-making outcome.