FADEC continues to update its power calculation during takeoff up to which speed and altitude, or until what event?

• A. 50 kts / 200 ft AGL or TOGA detent moved
• B. 65 kts / 400 ft AGL or Thrust Level moved from TOGA detent
• C. 60 kts / 300 ft AGL
• D. 70 kts / 500 ft AGL

Answer: (B)

When the takeoff is initiated, FADEC continuously refines the engine power plan to meet the required takeoff performance as airspeed and altitude change. This refinement continues up to a defined transition point from the takeoff phase to climb, which occurs at about 65 knots and 400 feet above ground level. If you reach that speed and altitude, the system locks in the climb power parameters and stops further takeoff-specific updates. The update also ends if the thrust level is moved away from the TOGA detent, because changing the thrust setting signals a different power regime and the FADEC switches to reflect the new setting rather than continuing the takeoff refinement.