18 Preventing Runway Excursions and Maintaining During Landing Roll

A runway excursion occurs when an aircraft departs the runway in use during the take-off or landing run. The excursion may be intentional or unintentional.

The key safety control barrier is flying a Stabilised Approach and maintaining this condition, which then leads to the landing runway threshold being crossed at the target speed and height.

Undesirable State - A landing aircraft is unable to stop before end of runway due to:

1. Touch-down speed is excessive; or,
2. Threshold crossing height is too high and/or the touchdown point is beyond the normal touch down zone; or,
3. Aircraft weight exceeds maximum for prevailing conditions; or,
4. Reported wind velocity or runway surface conditions differ from actual conditions; or,
5. Aircraft system on which landing performance is predicated such as brakes or spoilers malfunctions; or, significant Aquaplaning occurs.