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except obstacles may be disregarded if they are situated
beyond:
e) 7 R* for day operations if it is assured that navigational
accuracy can be achieved by reference to suitable visual
cues during the climb;
f) 10 R* for night operations if it is assured that
navigational accuracy can be achieved by reference to
suitable visual cues during the climb;
g) 300 m if navigational accuracy can be achieved by
navigation aids; and
h) 900 m in the other cases.
* R is the rotor radius.
l/11/01 ATT A-4
Annex 6 - Opedun of Airera@
4.2.4.2 In case of a landing on an elevated heliport or
helideck, the flight path may descend below the height of the
FATO in order to achieve V, if the following conditions are
satisfied:
a) A clearance margin is established in relation to the
elevated heliport or helideck itself and to all obstacles
located on the elevated heliport or helideck. 4.5 m
(15 ft) has been found appropriate to a wide range of
helicopters;
b) The vertical clearance above all obstacles not located on
the elevated heliport or helideck is at least equal to that
specified in 4-2.4.1.
4.3 Performance Class 3 helicopters
4.3.1 Take-08
(Figure A-6)
4.3.1.1 The mass of the helicopter at take-off does not
exceed the maximum take-off mass specified in the flight
manual taking into account the parameters specified in 2.1.
4.3.1.2 The take-off mass is such that a safe forced
landing can be achieved in the event of an engine failure.
4.3.2 Initial climb
4.3.2.1 The take-off mass is such that the climb path
provides a vertical clearance of not less than 10.7 m (35 ft)
above all obstacles located along the climb path, all engines
operating.
4.3.2.2 An obstacle is considered if its lateral distance
from the nearest point on the surface below the intended flight
path does not exceed 30 m or 1.5 times the over-all length of
the helicopter, whichever is greater, plus 0.10 DR, except
obstacles may be disregarded if they are situated beyond 7 R*.
4.3.3 En route
The take-off mass is such that it is possible to achieve the
minimum flight altitudes for the route to be flown, all engines
operating.
4.3.4 Approach, landing and balked landing
(Figure A- 1 1)
The estimated landing mass at the destination or alternate is
such that:
a) it does not exceed the maximum landing mass specified
in the flight manual, taking into account the parameters
specified in 2.1;
b) a safe forced landing can be achieved in the event of an
engine failure;
c) it is possible to perform a balked landing, all engines
operating, at any point of the flight path and clear all
obstacles by a vertical interval of 10.7 m (35 ft).
An obstacle is considered if its lateral distance from the
nearest point on the surface below the intended line of flight
does not exceed 30 m or 1.5 times the over-all length of the
helicopter, whichever is greater, plus 0.10 DR, except
obstacles may be disregarded if they are situated beyond 7 R*.
* R is the rolor radius.
ATT A-5
Annex 6 - Operation of Ahraft Part ZZJ
PERFORMANCE CLASS I HELICOPTERS
SURFACE LEVEL HELIPORT
TAKE-OFF
Rejected takeoff dince required 1
Take-off distance required
* 2L for water hellports
** 10.7 m for VFR operations
10.7 m + 0.01 OR for IFR operations
L = The maximum dimension of the helicopter
Note.-For IFR operations the safety area will be larger than depicted. See Annex 74, Volume 11, for details.
Figure A-1
ATT A4
Attachment A Annex 6 - Operetion of AIrcmfl
PERFORMANCE CLASS I HELICOPTERS
SURFACE LEVEL HELIPORT
(Alternativa indicated
at 4.1.1.2 b))
TAKE-OFF
' 2L for water heliports
'* 10.7 m for VFR operations
10.7 m + 0.01 DRfor IFR operations
L = The maximum dimension of the helicopter
Note.-For IFR operations the safety erea will be larger then depicted. See Annex 14, Volume I/, for deteils.
Figure A-2
ATT A-7
Annex 6 - Operalion of Akcmft Part IZZ
PERFORMANCE CLASS I HELICOPTERS
ELEVATED HELlPORTlHELlDECK
TAKE-OFF
" 10.7 m for VFR oparatlons
10.7 m + 0.01 DR for IFR operations
L The maximum dimension of tha hellcopter
Figure A-3
ATT A-8
Attachcut A Annex 6 - Operelion of Ah*
PERFORMANCE CLASS 2 HELICOPTERS
SURFACE LEVEL HELIPORT
TAKE-OFF
I
DR
:Area punitlina a safe for& landinn
*
4
VMC required
b4
IMC possible
' 2L for water heliports
" 10.7 m for VFR operations
10.7 m + 0.01 DR for IFR operations
L = The maximum dlmenslon of ths helicopter
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