Aviation safety issues and actions

Landing distance calculation at aircraft weights below the A380 maximum landing weight

Issue number: AO-2010-089-SI-12
Who it affects: Airbus SAS and operators of A380 aircraft
Issue owner: Rolls-Royce
Transport function: Aviation: Air transport
Background: Investigation Report AO-2010-089
Issue release date: 27 June 2013
Current issue status: Adequately addressed

Safety issue description

The calculation method in the aircraft manufacturer’s landing distance performance application was overly conservative and this could prevent the calculation of a valid landing distance at weights below the maximum landing weight with multiple system failures.

Proactive Action

Action number: AO-2010-089-NSA-053
Action organisation: Airbus Industrie
Date: 27 June 2013
Action status: Closed

On the 28 September 2011, in response to this safety issue, Airbus advised the ATSB of the following safety action:

Airbus has developed a product improvement with the in-flight landing distance application OIS 2B+, available to A380 Operators 4 October 2011 with SB A380-46-8046, that ensures consistency of computation results whatever the landing weight,

Airbus has informed all A380 Operators at March 2011 Flight Safety Conference and at May 2011 Performance and Operations Conference.

A further product improvement will be introduced with future OIS standards planned to be available by the third quarter of 2013 that will optimize performance calculation and therefore improve consistency of in-flight landing distance prediction to actual aircraft capability.

ATSB comment:

The ATSB is satisfied that the action taken by Airbus adequately addresses this safety issue and therefore makes no recommendation.

Last update 13 January 2014