Joint Aviation Requirements jar–29 Large Rotorcraft Joint Aviation Authorities

(a) Bag floats. Each bag float must be designed

to withstand –

(1) The maximum pressure differential

that might be developed at the maximum altitude

for which certification with the float is requested;

and

(2) The vertical loads prescribed in JAR

over three-quarters of its projected area.

(b) Rigid floats. Each rigid float must be able

to withstand the vertical, horizontal, and side loads

prescribed in JAR 29.521. An appropriate load

distribution under critical conditions must be used.

and auxiliary floats, if used, must have enough

watertight compartments so that, with any single

compartment of the hull or auxiliary floats flooded,

the buoyancy of the hull and auxiliary floats, and

wheel tyres if used, provides a margin of positive

water stability great enough to minimise the

probability of capsizing the rotorcraft for the worst

combination of wave heights and surface winds for

which approval is desired.

The hull, and auxiliary floats if used, must

withstand the water loads prescribed by JAR 29.519

with a rational and conservative distribution of local

and distributed water pressures over the hull and

float bottom.

For each pilot compartment –

(a) The compartment and its equipment must

allow each pilot to perform his duties without

unreasonable concentration or fatigue;

(b) If there is provision for a second pilot, the

rotorcraft must be controllable with equal safety

from either pilot position. Flight and powerplant

controls must be designed to prevent confusion or

inadvertent operation when the rotorcraft is piloted

from either position;

(c) The vibration and noise characteristics of

cockpit appurtenances may not interfere with safe

operation;

(d) Inflight leakage of rain or snow that could

distract the crew or harm the structure must be

prevented.

(a) Non precipitation conditions. For non

precipitation conditions, the following apply:

(1) Each pilot compartment must be

arranged to give the pilots a sufficiently

extensive, clear, and undistorted view for safe

operation.

(2) Each pilot compartment must be free

of glare and reflection that could interfere with

the pilot’s view. If certification for night

operation is requested, this must be shown by

night flight tests.

(b) Precipitation conditions. For precipitation

conditions, the following apply:

(1) Each pilot must have a sufficiently

extensive view for safe operation –

(i) In heavy rain at forward speeds

up to VH; and

(ii) In the most severe icing

condition for which certification is

requested.

(2) The first pilot must have a window

that –

(i) Is openable under the

(b)(1) of this paragraph; and

(ii) Provides the view prescribed in

that paragraph.