EASA proposes mandatory takeoff performance monitoring systems on new aircraft
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Civil Aviation Resources Network, July 8, 2025: According to Flightglobal, the latest proposal of the European Union Aviation Safety Agency (EASA) is that some transport aircraft will be required to install a takeoff performance monitoring system to continuously reduce the risks caused by data input or calculation errors. This mandatory requirement only applies to newly manufactured aircraft and is expected to take effect around 2033 at the earliest.
EASA said that the motivation for formulating this measure was due to concerns about the long-term safety hazard of "undetected deviations in takeoff performance". Such deviations may be caused by incorrect takeoff parameters, using the wrong runway intersection, or improper configuration of the aircraft based on incorrect weight and balance data.
According to the proposal, the proposed monitoring system will consist of three functional modules, namely F1, F2 and F3, which are used to detect problems in the takeoff phase and alert pilots. F1 is responsible for checking takeoff parameter errors such as flight management system input; F2 confirms whether the aircraft is in the correct position at the beginning of the takeoff run; F3 provides real-time monitoring of takeoff performance.
EASA pointed out that the F1 and F2 functions will apply to all transport aircraft, while the F3 function is only required to be installed on larger aircraft, such as large passenger aircraft or cargo aircraft, excluding small business jets and regional turboprop aircraft.
EASA explained that as the "most complex and costly" of the three functions, the cost-effectiveness of mandatory installation of F3 on all aircraft is limited. Although mandatory installation of all three functions can prevent up to 89% of potential new aircraft takeoff safety events, after reviewing past accident cases, EASA believes that no small aircraft accident has been found that only the F3 function can prevent, but F1 and F2 cannot. Therefore, EASA said that the F3 function has "very limited actual benefits" for turboprop aircraft and business jets, but business jets based on large passenger aircraft designs will not be exempted.
Although the proposal does not require modifications to in-service aircraft, it will apply to newly produced, certified model airframes and completely new designs. EASA estimates that by 2058, 25 years after the proposal is implemented, the number of aircraft in the global fleet that meet the new regulations will double.
Currently, EASA has solicited public opinions, and the deadline for submission of opinions is October 3 this year.