During preflight performance calculations, the crew of an Airbus A321 inadvertently referenced the performance chart for a longer runway length. That produced inappropriately high take-off reference speeds that would have adversely affected the operation of the aircraft in the case of an engine failure.
Jetstar Airways advised that they had reminded pilots to independently calculate takeoff data and prohibited the use of bookmarking the performance manual. They also commenced an internal investigation.
The application of correct operating data is a foundational and critical element of flight safety, but errors in the calculation, entry and checking of data are not uncommon. The ATSB has published a research report that addresses this issue.
|Date:||12 June 2011||Investigation status:||Completed|
|Location:||Darwin Airport||Investigation level:||Short|
|State:||Northern Territory||Occurrence type:||Aircraft Separation|
|Release date:||12 December 2011||Occurrence class:||Operational|
|Report status:||Final||Occurrence category:||Incident|
|Highest injury level:||None|
|Aircraft manufacturer||Airbus Industrie|
|Type of operation||Air Transport High Capacity|
|Damage to aircraft||Nil|
|Departure point||Darwin, NT|