Download the PDF consolidation of Part 125 [PDF 701 KB]
A holder of an air operator certificate must carry out the following procedures under rule 125.233(b)(2) for calculating the landing distance where a runway is dry:
(a) A holder of an air operator certificate must ensure that, for each aeroplane it operates, the landing weight for the estimated time of landing allows a full-stop landing from 50 feet above the threshold within 70% of the landing distance available assuming that the aeroplane is landed.
(b) When calculating the landing weight in under paragraph (a), the holder of an air operator certificate must take account of—
(1) aerodrome elevation; and
(2) ambient temperature at the aerodrome; and
(3) the type of runway surface and the runway surface condition; and
(4) the runway slope in the direction of landing; and
(5) not more than 50% of the reported headwind component or not less than 150% of the reported tailwind component.
(c) For an aeroplane to land as specified in paragraphs (b) and (c), it is assumed that the aeroplane will land on the most favourable runway taking into account—
(1) the forecast meteorological conditions; and
(2) surrounding terrain; and
(3) approach and landing aids; and
(4) obstacles within the missed approach flight path.
(d) If the holder of an air operator certificate is unable to comply with paragraph (c) for the destination aerodrome, the aeroplane may be dispatched if an alternate aerodrome is designated that permits compliance with paragraphs (a), (b), and (c).
A holder of an air operator certificate must carry out the following procedure under rule 125.233(b)(2) for calculating the landing distance where a runway is wet or contaminated –
ensure that, for each aeroplane it operates, when the appropriate weather reports or forecasts or a combination of them, indicate that the runway at the estimated time of arrival of its aeroplane may be wet or contaminated, the landing distance available is at least 115% of the landing distance required by paragraph D.1.
