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operational life.
Limiting airspeeds, based on the corresponding design airspeeds
with safety margins, where appropriate, in accordance
with A.2.1, shall be included in the flight manual as part of the
C.2 Mass and mass distribution operating limitations (see G2).
Unless otherwise stated, all structural Standards shall be complied
with when the mass is varied over the applicable range
and is distributed in the most adverse manner, within the operating
limitations on the basis of which certification is sought.
C.3 Limit loads
Except as might be otherwise qualified, the external loads and
the corresponding inertia loads, or resisting loads obtained for
the various loading conditions prescribed in C.6 shall be
considered as limit loads.
C.4 Deformation and ultimate strength
C.6 Strength
C.6.1 All structural elements shall be designed to withstand
the maximum loads expected in service under all anticipated
operating conditions without failure, permanent
distortion or loss of functionality. In determining these loads,
account shall be taken of:
a) the expected operational life of the aeroplane;
b) the vertical and horizontal gust environment, taking into
consideration the expected variations in mission profile
and loading configurations;
c) the manoeuvre spectrum, taking into account variations
in mission profiles, and loading configurations;
In the various loading conditions prescribed in C.6, no part of
the aeroplane structure shall sustain detrimental deformation at d) asymmetrical as well as symmetrical loading;
any load up to and including the limit load, and the aeroplane
structure shall be capable of supporting the ultimate load. e) the ground and water loads, including taxi, landing and
take-off loads, and groundlwater handling loads;
C.5 Airspeeds
f) the speed range of the aeroplane, taking into account the
aeroplane characteristics and operation limitations;
g) vibration and buffeting loads;
C.5.1 Design airspeeds
Design airspeeds shall be established for which the aeroplane
structure is designed to withstand the corresponding manoeuvring
and gust loads. To avoid inadvertent exceedences due
to upsets or atmospheric variations, the design airspeeds shall
provide sufficient margin for the establishment of practical
operational limiting airspeeds. In addition, the design airspeeds
shall be sufficiently greater than the stalling speed of
the aeroplane to safeguard against loss of control in turbulent
air. Consideration shall be given to a design manoeuvring
speed, a design cruising speed, a design dive speed, and any
h) corrosion or other degradation, given the maintenance
specified, and various operating environments; and
i) any other loads, such as flight control loads, cabin pressurization
loads, engine loads, or dynamic loads due to
changes to the steady state configuration.
C.6.2 The air, inertia and other loads resulting from the
specific loading conditions shall be distributed so as to
approximate actual conditions closely or to represent them
conservatively.
ANNEX 8
Annex 8 - Airworthiness of Aircraft
C.7 Survivability
The aeroplane shall be designed so as to provide the occupants
with the maximum practicable protection in the event of
structural failure, or in the event of damage due to ground,
water or object impact. Consideration shall be given to at least
the following:
a) energy absorption by the airframe, occupant seats and
restraints; and
b) allowing egress in the shortest practicable time.
C.8 Structural durability
The design and construction of the aeroplane shall conform to
damage tolerance, safe-life or failsafe principles and shall be
such as to ensure that the probability of catastrophic failure
during the operational life is extremely remote, taking into
account, where appropriate:
a) the expected environment;
b) the expected repeated loads applied in service;
C) expected vibrations from aerodynamic interaction or
internal sources;
d) thermal cycles;
e) accidental and discrete source damage;
f) likely corrosion or other degradation;
g) specified maintenance; and
h) likely structural repairs.
Note.- Guidance material concerning the expression
"extremely remote" is contained in the Airworthiness Manual
(Doc 9760).
SUB-PART D. DESIGN AND CONSTRUCTION
D.l General
D. 1.1 Details of design and construction shall be such as
to give reasonable assurance that all aeroplane parts will function
effectively and reliably in the anticipated operating conditions.
They shall be based upon practices that experience has
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附件8--航空器适航性 Airworthiness of Aircraft(66)
