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Flight crew operating manual procedure for Vref40 check
Date issue released
Safety Issue Description

The Flight Crew Operating Manual procedure for crew comparison of the calculated Vref40 speed, while designed to assist in identifying a data entry error, could be misinterpreted, thereby negating the effectiveness of the check.

Issue number
AO-2014-162-SI-01
Transport Function
Aviation: Air transport
Issue Owner
Qantas Airways Ltd
Mode of Transport
Aviation
Issue Status Justification

The action by Qantas provides an additional defence to address the risk associated with this safety issue. 

Proactive action
Action number
AO-2014-162-NSA-004
Organisation
Qantas Airways Ltd
Action date
Action Status
Closed
Action description

Qantas Airways Ltd. (Qantas) has advised that the Central Display Unit pre-flight procedure has been modified as follows. After the take-off data has been verified and compared by both flight crew, they are to check the ‘APPROACH REF’ page and verify the Vref40 speed.