spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 35.34

by the declared environmental conditions, including temperature, electromagnetic interference (EMI), high intensity radiated fields (HIRF) and
lightning. The environmental limits to
which the system has been satisfactorily validated must be documented in
the appropriate propeller manuals.
(3) A method is provided to indicate
that an operating mode change has occurred if flight crew action is required.
In such an event, operating instructions must be provided in the appropriate manuals.
(b) The propeller control system
must be designed and constructed so
that, in addition to compliance with
Section 35.15:
(1) No single failure or malfunction of
electrical or electronic components in
the control system results in a hazardous propeller effect.
(2) Failures or malfunctions directly
affecting the propeller control system
in a typical airplane, such as structural failures of attachments to the
control, fire, or overheat, do not lead
to a hazardous propeller effect.
(3) The loss of normal propeller pitch
control does not cause a hazardous propeller effect under the intended operating conditions.
(4) The failure or corruption of data
or signals shared across propellers does
not cause a hazardous propeller effect.
(c) Electronic propeller control system imbedded software must be designed and implemented by a method
approved by the Administrator that is
consistent with the criticality of the
performed functions and that minimizes the existence of software errors.
(d) The propeller control system
must be designed and constructed so
that the failure or corruption of airplane-supplied data does not result in
hazardous propeller effects.
(e) The propeller control system
must be designed and constructed so
that the loss, interruption or abnormal
characteristic
of
airplane-supplied
electrical power does not result in hazardous propeller effects. The power
quality requirements must be described
in the appropriate manuals.

Section 35.24

Strength.

The maximum stresses developed in
the propeller may not exceed values acceptable to the Administrator considering the particular form of construction and the most severe operating
conditions.
[Amdt. 35-8, 73 FR 63348, Oct. 24, 2008]

Subpart C - Tests and Inspections
Section 35.31

[Reserved]

Section 35.33

General.

(a) Each applicant must furnish test
article(s) and suitable testing facilities, including equipment and competent personnel, and conduct the required tests in accordance with part 21
of this chapter.
(b) All automatic controls and safety
systems must be in operation unless it
is accepted by the Administrator as
impossible or not required because of
the nature of the test. If needed for
substantiation, the applicant may test
a different propeller configuration if
this does not constitute a less severe
test.
(c) Any systems or components that
cannot be adequately substantiated by
the applicant to the requirements of
this part are required to undergo additional tests or analysis to demonstrate
that the systems or components are
able to perform their intended functions in all declared environmental and
operating conditions.
[Amdt. 35-8, 73 FR 63348, Oct. 24, 2008]

Section 35.34 Inspections,
repairs.

adjustments

(a) Before and after conducting the
tests prescribed in this part, the test
article must be subjected to an inspection, and a record must be made of all
the relevant parameters, calibrations
and settings.
(b) During all tests, only servicing
and minor repairs are permitted. If
major repairs or part replacement is
required, the Administrator must approve the repair or part replacement

[Amdt. 35-8, 73 FR 63347, Oct. 24, 2008]

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