The ATSB has released its preliminary investigation report into the operational non-compliance of the Tiger Airways, Airbus A320, approaching Melbourne Airport, 7 June 2011.
The aircraft was cleared by air traffic control to descend to 2,500 ft. Shortly after, the aircraft descended to 2,000 ft. Air traffic control notified the flight crew, who then climbed the aircraft to 2,500 ft. The Aircrew continued the approach and landed the aircraft safely.
Preliminary Report:
Investigation: AO-2011-070 - Operational non-compliance - Airbus A320, VH-VNG, 17 km ENE Melbourne Airport, Victoria, 7 June 2011