Document ID: chunk:federal_register_of_legislation:F2024C01173:reg:4:p15
Version: federal_register_of_legislation:F2024C01173
Segment Type: reg
Provision Reference: reg 4 (pt 15/18)
Character Range: 181132–183986

on operating speeds and flight path; and
 (ii) distance increments resulting from increased operating speeds; and
 (iii) distance increments resulting from the acceleration reduction equivalent to the climb gradient reductions mentioned in paragraph (f); and
 (iv) retention of stall margin and loss of climb gradient.
Note 1: Paragraph (7)(d) requires the height selected by the operator for the level flight acceleration manoeuvre to be more than 35 ft higher than the highest obstacles within the new take-off flight path.
Note 2: The net take-off flight path and the gross take-off flight path may be considered identical when the aeroplane is in the take-off configuration described in  subsection 9.05(2).
 (8) In this section:
Civil Aviation Order 20.7.1B means Civil Aviation Order 20.7.1B – Aeroplane weight and performance limitations – specified aeroplanes above 5 700 kg, or 2 722 kg if driven by 2 or more jet engines – all operations.

9.05  Gross gradient requirements—take-off configuration
 (1) Subsections (2) and (3) set out, for the purposes of paragraph 9.02(a), the requirements relating to gross gradients in the take-off configuration.
 (2) In the take-off configuration assuming failure of the critical engine recognised at V1, the aeroplane must be able to climb, without ground effect and without landing gear retraction, at the speed established as the speed at which the aeroplane becomes airborne, and, in doing so, achieve a gross gradient of climb of at least:
 (a) if the aeroplane has 2 engines—positive; or
 (b) if the aeroplane has 3 engines—0.3%; or
 (c) if the aeroplane has 4 engines—0.5%.
 (3) In the take-off configuration that exists with the critical engine inoperative and the landing gear fully retracted, the aeroplane at speed V2 is able to achieve a gross gradient of climb of at least:
 (a) if the aeroplane is a commuter type aeroplane—2%; or
 (b) otherwise:
 (i) if the aeroplane has 2 engines—2.4%; or
 (ii) if the aeroplane has 3 engines—2.7%; or
 (iii) if the aeroplane has 4 engines—3.0%.

9.06  Level flight acceleration manoeuvre requirements
 (1) Subsections (2) and (3) set out, for the purposes of paragraph 9.02(a), the requirements relating to level flight acceleration manoeuvres.
 (2) The aeroplane may be accelerated in level flight from V2 speed to final take-off climb speed at a height above the take-off surface that is the greater of:
 (a) 400 ft; and
 (b) the height necessary to achieve obstacle clearance in accordance with subsection 9.04(1).
 (3) During the level flight acceleration manoeuvre, the aeroplane, with the critical engine inoperative, must have an available gross gradient of climb of at least:
 (a) if the aeroplane has 2 engines—1.2%; and
 (b) if the aeroplane has 3 engines—1.4%; and
 (c) if the aeroplane has 4 engines—1.5%.

9.07  Gross gradient requirements—en