On 8 August 2006 at 1115 EST, a Cessna Aircraft Company model
182P aircraft, registered VH-WNR, departed Archerfield Aerodrome,
Qld, on a private flight to Goondiwindi, Qld. The pilot was the
only person on board. At 1121, the pilot transmitted a distress
message to air traffic control that he was attempting an emergency
landing and that the aircraft engine had failed. At that time, the
aircraft was approximately 5 km west of Archerfield Aerodrome at
about 1,000 ft above ground level. The aircraft subsequently
collided with powerlines before impacting the roof of a house. It
traversed the roof and came to rest inverted a short distance from
the rear of the house. A fire began when leaking fuel ignited. The
pilot received serious burns to his upper body. The aircraft was
destroyed by impact forces and fire. The house sustained major
structural damage to its roof and two of the three occupants
received minor injuries.
Subsequent engine disassembly and examination revealed
catastrophic damage to the engine related to the failure of the
number-5 cylinder connecting rod assembly. Reduced connecting rod
pre-load, due either to insufficient assembly torque, or excessive
torque producing permanent bolt stretch, was considered the most
likely reason for the failure of the connecting rod assembly.
However, because of the consequential damage caused by continued
engine operation, there was inadequate evidence to directly support
either failure mode.