Page 124 - Overseas Territories Aviation Requirements Consolidated - Total AOC

Regulation OTAR Part 121 - CAT - Large Aeroplanes

OTAR.121.502 Performance planning
The operator shall ensure that:
(a) when determining the performance of the aeroplane, account is taken of at least the following
factors:
(1) the mass of the aeroplane; and
(2) the pressure altitude and temperature; and
(3) wind - not more than 50 % of the reported head-wind component, or if operations with a
tail-wind are permitted and performance data is provided, not less than 150 % of the
reported tail-wind component;
(4) aeroplane operating techniques
(5) runway gradient;
(6) condition of runway;
(7) water surface state (where relevant).
(b) Due account is taken of aeroplane configuration, environmental conditions and the operation of
systems which may have an adverse effect on performance.
(c) The development of procedures for obstacle avoidance during take-off, landing and balked
landing takes into account aerodrome obstacle data.
OTAR.121.510 Accuracy of available data
The operator shall take account of the accuracy of charts and other data used during performance
planning, when assessing whether a flight can be safely operated.
OTAR.121.515 Performance data
The operator shall ensure that, for each aeroplane it operates the performance data used is:
(a) contained in the aeroplane flight manual; or
(b) where provided by the aircraft manufacturer or other source, contained in an equivalent
document; and
(c) available to all flight crew or other persons responsible for flight planning or aircraft dispatch.

OTAR.121.520 Runway friction coefficient
The operator shall ensure that where performance data has been determined using measured coefficient of
runway friction, the pilot-in-command complies with a procedure that correlates the measured coefficient of
runway friction and the effective braking coefficient of friction of that aeroplane type, over the required speed
range for the existing runway conditions.
OTAR.121.525 Runway surface conditions
The operator shall ensure that:
(a) runway surface conditions have been taken account of in any performance calculations made;
and
(b) runway surface conditions do not preclude a safe aircraft departure.
OTAR.121.530 Wet and contaminated runway surfaces
The operator shall ensure that where it is necessary for a take-off to be made on a runway contaminated
with water, slush, snow or ice account is taken of:
(a) the runway overrun area; and
(b) local wind conditions, including any element of tailwind or crosswind; and
(c) height of any snow banks adjacent to the runway.

OTAR.121.535 Runway factors
The operator shall ensure that where a runway is not a paved, dry, flat surface appropriate performance
factors are applied to any calculation of distance required for take off or landing.
OTAR.121.540 Grass runways
The operator shall ensure that:
(a) only performance data provided for grass runways under the specified conditions for the surface
is used. Where no specification is made, the performance data shall only be used if:
(1) the grass is less than 8 inches (20 cm) high; and
(2) soil conditions are firm, such that there may be wheel impressions in the soil but no
rutting.
(b) any damp grass surface is considered to be wet for the purpose of applying performance factors.

OTAR.121.545 Loss of runway length
Overseas Territories Aviation Requirements 124 of 386