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the tests specified.
b) Operation. Tests shall be conducted to ensure that
starting, idling, acceleration, vibration, over-speeding
and other characteristics are satisfactory and to demonstrate
adequate margins of freedom from detonation,
surge, flutter or other detrimental conditions as may be
appropriate to the particular type engine.
c) Endurance. Tests of sufficient duration shall be
conducted at such powers, thrust, speeds, temperatures
and other operating conditions as are necessary to
demonstrate reliability and durability of the engine.
They shall also include operation under conditions in
excess of the declared limits to the extent that such
limitations might be exceeded in actual service.
d) Operating Environment. Tests shall be conducted to
ensure that the engine characteristics are satisfactory
with regard to the operating environment.
Note.- Operating environment may include encounter with
birds, rain and hail, electromagnetic interference and
lightning.
ANNEX 8
A.l Applicability
PART VII. PROPELLERS
SUB-PART A. GENERAL
A.l.l The Standards of this part are applicable to all
propellers, as required in Parts IIIB and V.
Note.- The following Standards do not include quantitative
specifcations comparable to those found in national
airworthiness codes. In accordance with 1.2.1 of Part II, these
Standards are to be supplemented by requirements established,
adopted or accepted by Contracting States.
A.1.2 The level of airworthiness defined by the appropriate
parts of the comprehensive and detailed national code for
the propellers designated in A.l.l shall be at least substantially
equivalent to the overall level intended by the broad Standards
of this part.
A.2 Declared ratings, conditions and limitations
The power ratings and all operating conditions and limitations
which are intended to govern the operation of the propeller
shall be declared.
A.3 Continuing airworthiness -
maintenance information
A.3.1 General
Information for use in developing procedures for maintaining
the propeller in an airworthy condition shall be made
available. The information shall include that described in
A.3.2, A.3.3 and A.3.4.
A.3.2 Maintenance information
Maintenance information shall include a description of the
propeller and recommended methods for the accomplishment
of maintenance tasks. Such information shall include guidance
on defect diagnosis.
A.3.3 Maintenance programme
information
Maintenance programme information shall include the
maintenance tasks and the recommended intervals at which
these tasks are to be performed.
A.3.4 Mandatory maintenance requirements
resulting from the type
design approval
Mandatory maintenance requirements that have been specified
by the State of Design as part of the approval of the type
design shall be identified as such and included in the
maintenance information of A.3.3.
ANNEX 8
SUB-PART B. DESIGN AND CONSTRUCTION
B.l Functioning
The propeller assembly shall be designed and constructed so
as to function reliably within its operating limitations under its
anticipated operating conditions when installed in accordance
with Parts IIIB or V of this Annex and shown to be not
hazardous.
B.2 Failure analysis
A safety assessment of the propeller shall be conducted to
ensure that it functions safely throughout the full range of
operating conditions. A summary shall be made of those
failures which could result in hazardous propeller effects. If
the primary failure of single elements (for example, blades) is
likely to result in hazardous propeller effects, reliance must be
placed on meeting prescribed integrity requirements.
B.3 Materials and manufacturing methods
The selection of materials and the manufacturing methods and
processes shall account for the operational environment of the
propeller expected in service. The materials and manufacturing
methods and processes used in the construction of the propeller
shall result in known and reproducible structural behaviour.
B.4 Pitch control and indication
B.4.1 No loss of normal propeller pitch control shall cause a
hazardous overspeeding under anticipated operating conditions.
B.4.2 No single failure or malfunction in the propeller
control system during normal or emergency operation shall
result in unintended travel of the propeller blades to a position
below the in-flight low-pitch position. Failure of structural
elements need not be considered if the occurrence of such a
failure is shown to be extremely remote.
　
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