Page 322 - UK Air Operations Regulations 201121

Part CAT - ANNEX IV - Commercial Air Transport Operations

compliance with (a) and (b).
CAT.POL.A.430 AMC1 Landing — dry runways
LANDING DISTANCE CORRECTION FACTORS
(a) Unless otherwise specified in the AFM or other performance or operating manuals from
the manufacturers, the variables affecting the landing performance and the associated
factors to be applied to the AFM data are shown in the table below. It should be applied in
addition to the factor specified in CAT.POL.A.430.
(b) The soil should be considered firm when there are wheel impressions, but no rutting.

CAT.POL.A.430 AMC2 Landing — dry runways
RUNWAY SLOPE
Unless otherwise specified in the AFM, or other performance or operating manuals from the
manufacturer, the landing distances required should be increased by 5 % for each 1 % of downslope.
CAT.POL.A.430 GM1 Landing — dry runways
LANDING MASS
CAT.POL.A.430 establishes two considerations in determining the maximum permissible landing
mass at the destination and alternate aerodromes.
(a) Firstly, the aeroplane mass will be such that on arrival the aeroplane can be landed within
70 % of the LDA on the most favourable (normally the longest) runway in still air.
Regardless of the wind conditions, the maximum landing mass for an
aerodrome/aeroplane configuration at a particular aerodrome cannot be exceeded.
(b) Secondly, consideration should be given to anticipated conditions and circumstances.
The expected wind, or ATC and noise abatement procedures may indicate the use of a
different runway. These factors may result in a lower landing mass than that permitted
under (a), in which case dispatch should be based on this lesser mass.
(c) The expected wind referred to in (b) is the wind expected to exist at the time of arrival.
CAT.POL.A.435 Landing — wet and contaminated runways
(a) When the appropriate weather reports or forecasts indicate that the runway at the
estimated time of arrival may be wet, the LDA shall be one of the following distances:
(1) a landing distance provided in the AFM for use on wet runways at time of dispatch,
but not less than that required by point CAT.POL.A.430;
(2) if a landing distance is not provided in the AFM for use on wet runways at time of
dispatch, at least 115 % of the required landing distance, determined in accordance
with point CAT.POL.A.430.
(b) When the appropriate weather reports and/or forecasts indicate that the runway at the
estimated time of arrival may be contaminated, the landing distance shall not exceed the
LDA. The operator shall specify in the operations manual the landing distance data to be
applied.
CAT.POL.H.100 Applicability
(a) Helicopters shall be operated in accordance with the applicable performance class
requirements.
(b) Helicopters shall be operated in performance class 1:
(1) when operated to/from aerodromes or operating sites located in a congested
hostile environment, except when operated to/from a public interest site (PIS) in
accordance with CAT.POL.H.225; or
(2) when having an MOPSC of more than 19, except when operated to/from a helideck
in performance class 2 under an approval in accordance with CAT.POL.H.305.
(c) Unless otherwise prescribed by (b), helicopters that have an MOPSC of 19 or less but
more than nine shall be operated in performance class 1 or 2.
(d) Unless otherwise prescribed by (b), helicopters that have an MOPSC of nine or less shall
be operated in performance class 1, 2 or 3.
CAT.POL.H.105 General
(a) The mass of the helicopter:
(1) at the start of the take-off; or
(2) in the event of in-flight replanning, at the point from which the revised operational
flight plan applies,
shall not be greater than the mass at which the applicable requirements of this Section
can be complied with for the flight to be undertaken, taking into account expected
reductions in mass as the flight proceeds and such fuel jettisoning as is provided for in
the relevant requirement.
(b) The approved performance data contained in the AFM shall be used to determine
compliance with the requirements of this Section, supplemented as necessary with other
data as prescribed in the relevant requirement. The operator shall specify such other data
in the operations manual. When applying the factors prescribed in this Section, account
may be taken of any operational factors already incorporated in the AFM performance
data to avoid double application of factors.
(c) When showing compliance with the requirements of this Section, account shall be taken
of the following parameters:
(1) mass of the helicopter;
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