Definition
Under ICAO standards, the length of runway declared available and suitable for the ground run of an aircraft taking off. It is one of the four ICAO declared distances published for a runway, alongside Takeoff Distance Available (TODA), Accelerate-Stop Distance Available (ASDA), and Landing Distance Available (LDA).
Plain English
The amount of runway a pilot actually has to roll on the ground while accelerating for takeoff, as officially declared by the airport authority under ICAO rules.
Context Anchor
Seen in runway data, airport planning information, and takeoff performance checks where officially published runway distances are listed.
Derivation
‘Takeoff run’ refers to the ground roll portion of takeoff — from brake release to liftoff. ‘Available’ here means officially declared by the airport, not simply the physical pavement length. The two can differ when displaced thresholds, stopways, or clearways change what counts.
Why Pilots Care
Determines the maximum weight at which an aircraft can safely depart from a given runway under current conditions.
Intuition Check
Available does not mean every bit of pavement you can see. Here it means the runway length officially declared usable for the takeoff ground run.
Example Sentence 1
Before departure, the crew checked that the aircraft’s required ground roll was well within the published TORA for Runway 27.
Example Sentence 2
Runway 27 has a takeoff run available of 2,500 meters according to the airport information.