21.A.35 Flight Tests

• Regulation (EU) No 748/2012 found in: Initial Airworthiness and Environmental Protection (748/2012) Part-21 Part-21L (Jul 2024)
• Regulation (EU) 2024/1108 found in: Initial Airworthiness and Environmental Protection (748/2012) (Nov 2025)

21.A.35 Flight Tests Regulation (EU) No 748/2012 (a)     Flight testing for the purpose of obtaining a type-certificate shall be conducted in accordance with conditions for such flight testing specified by the Agency. (b)     The applicant shall make all flight tests that the Agency finds necessary: 1.       to determine compliance with the applicable type-certification basis and environmental protection requirements; and 2.       to determine whether there is reasonable assurance that the aircraft, its parts and appliances are reliable and function properly for aircraft to be certificated under this [Annex I](#_DxCrossRefBm1649096856) (Part 21), except for, (i)      sailplanes and powered sailplanes, (ii)     balloons and airships defined in ELA1 or ELA2, (iii)     aeroplanes of 2 722 kg or less maximum take-off mass (MTOM). (c)      (Reserved) (d)     (Reserved) (e)     (Reserved) (f)      The flight tests prescribed in point (b)(2) shall include: 1.       for aircraft incorporating turbine engines of a type not previously used in a type-certificated aircraft, at least 300 hours of operation with a full complement of engines that conform to a type-certificate; and 2.       for all other aircraft, at least 150 hours of operation. #### 21.A.35 Flight Tests *Regulation (EU) 2024/1108* (a) Flight testing for the purpose of obtaining a type-certificate shall be conducted in accordance with conditions for such flight testing specified by the Agency. (b) The applicant shall perform all flight tests that the Agency finds necessary to determine: 1. compliance with the applicable type-certification basis and environmental protection requirements; and 2. whether there is reasonable assurance that the aircraft, its parts, appliances, the UAS orthe CMU are reliable and function properly for aircraft, UAS and CMUs to be certified under this Annex, except for: (i) sailplanes, other than unmanned sailplanes, and powered sailplanes, other than unmanned powered sailplanes; (ii) balloons and airships defined in ELA1 or ELA2; (iii) aeroplanes, other than unmanned aeroplanes, with a maximum take-off mass (MTOM) of 2 722kg or less. (c) (Reserved) (d) (Reserved) (e) (Reserved) (f) The flight tests prescribed in point (b)(2) shall include: 1. for aircraft other than unmanned aircraft: (i) the flight hours that the Agency finds necessary to ensure that its safe operation is demonstrated before the aircraft enters into service and shall be at least 150 hours; (ii) in particular, for aircraft incorporating turbine engines of a type not previously used in a type‑certified aircraft, at least 300 hours of operation with a full complement of engines that conform to a type‑certificate; 2. for UAS and CMUs, the flight hours that the Agency finds necessary, considering the degree of complexity of the design of the aircraft and the CMU and their risk on safety, to ensure that their safe operation is demonstrated before the aircraft and the CMU enter into service.