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an aircraft providing elec&ical/pneumatic power to aircraft compliance, whichever is smallel:
systems during ground operations.
Bypass ratio. The ratio of the air mass flow through the bypass External equipment (helicopter). Any instrument, mechanism,
ducts of a gas turbine engine to the air mass flow through part, apparatus, appurtenance, or accessory that is attached
the combustion chambers calculated at maximum thrust to or extends fiom the helicopter exterior but is not used
when the engine is stationary in an international standard nor is intended to be used for operating or controlling a
atmosphere at sea level. helicopter in flight and is not part of an airfiame or engine.
Derived version of a helicopter. A helicopter which, fiom the Helicopter. A heavier-than-air aircraft supported in flight
point of view of airworthiness, is similar to the noise cer- chiefly by the reactions of the air on one or more powertificated
prototype but incorporates changes in type design driven rotors on substantially vertical axes.
which may affect its noise characteristics adversely.
Human performance. Human capabilities and limitations which
Note 1 .In applying the Standards of this Annex, a heli- have an impact on the safety and efficiency of aeronautical
copter that is based on an existing prototype but which is con- operations.
sidered by the cert8cating authority to be a new fype design
for airworthiness shall nevertheless be considered & Recertifcafian. Certification of an aircraft with or without a
a derived version if the noise source characteristics areludged revision to its certificatior~ noise levels, to a Statidard
by the certzjkating authority to be the same as the prototype. different to that to which it was originally certificated.
Note 2.- "Adversely" refers to an increase of more than
0.3 dB in any one of the noise cert@cation levels. Self-sustaining powered sailplane. A powered aeroplane with
available engine power which allows it to maintain level
Derived version of an aeroplane. An aeroplane which, fiom flight but not to take off under its own power.
the point of view of airworthiness, is similar to the noise
certificated prototype but incorporates changes in type Subsonic aeroplane. An aeroplane incapable of sustaining
design which may affect its noise characteristics adversely. level flight at speeds exceeding flight Mach number of 1.
ANNEX 16 - VOLUME I
PART 11. AIRCRAFT NOISE CERTIFICATION
CHAPTER 1. ADMINISTRATION
1.1 The provisions of 1.2 to 1.6 shall apply to all aircraft
included in the classifications defined for noise certification
purposes in Chapters 2, 3,4, 5, 6, 8, 10, 11 and 12 of this part
where such aircraft are engaged in international air navigation.
1.2 Noise certification shall be granted or validated by the
State of Registry of an aircraft on the basis of satisfactory
evidence that the aircraft complies with requirements that are at
least equal to the applicable Standards specified in this Annex.
1.3 If noise recertification is requested, it shall be granted
or validated by the State of Registry of an aircraft on the basis
Item 9. Maximum take-off mass in lulograms.
Item 10. Maximu~n latiditig mass, in kilograms, for certificates
issued under Chapters 2, 3, 4, 5 and 12
of this Annex.
Item 1 I. The chapter and section of this Annex according
to which the aircraft was certificated.
Item 12. Additional modifications incorporated for the
purpose of compliance with the applicable noise
certification Standards.
of satisfactory evidence that the aircraft complies with requirements
that are at least equal to the applicable Standards speci- Item 13. The IateraWfull-power noise level in the correfied
in this Annex. The date used by a certificating authority sponding unit for documents issued under
to determine the recertification basis shall be the date of Chapters 2, 3, 4, 5 and 12 of this Annex.
acceptance of the first application for recertification.
1.4 The documents attesting noise certification shall be
approved by the State of Registry and shall be required by that
State to be carried on the aircraft.
Note.- See Annex 6, Part 1, 6.13, concerning the translation
into English of documents attesting noise certification.
1.5 The documents attesting noise certification for an
aircraft shall provide at least the following information:
Item 1. Name of State.
Item 2. Title of the noise document.
Item 3. Number of the document.
Item 14. The approach noise level in the corresponding
unit for documents issued under Chapters 2, 3,
4. 5, 8 and 12 of this Annex.
ltem 15. The flyover noise level in the corresponding unit
for documents issued under Chapters 2, 3, 4, 5
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