FAA Airline Transport Pilot (ATM)Aircraft Performance and Weight and BalanceEasy
An airport publishes a runway with 500 feet of stopway beyond the far end of the paved runway surface, but no clearway. Which of the following takeoff performance distances is increased by the presence of this stopway?
- ATakeoff Run Available (TORA)
- BLanding Distance Available (LDA)
- CTakeoff Distance Available (TODA)
- DAccelerate-Stop Distance Available (ASDA)
Show answer & explanationAnswer & explanation
Correct answer: D. Accelerate-Stop Distance Available (ASDA)
A stopway is a defined area beyond the runway able to support an airplane during an aborted takeoff, and it is added only to the Accelerate-Stop Distance Available (ASDA = TORA + stopway). A clearway, by contrast, would be added to TODA (TODA = TORA + clearway). Stopway does not affect TORA or landing distance.
Why the other options are wrong
- A. TORA is the physical runway length itself and is unaffected by stopway.
- B. LDA pertains to landing operations and is unrelated to takeoff stopway.
- C. TODA is increased by a clearway, not a stopway.
Runway Declared Distances
TORA, TODA, ASDA, and LDA are declared distances used in takeoff and landing performance planning, each accounting for different runway extensions like clearway and stopway.
- TORA = actual runway length for takeoff run
- TODA = TORA + clearway
- ASDA = TORA + stopway
- LDA = declared landing distance available
Memory trick: Clearway helps you Climb away (TODA); Stopway helps you Stop (ASDA)