spaschal on DSK3GDR082PROD with CFR

Federal Aviation Administration, DOT

Section 34.1

applicable requirements. Engines excepted with respect to certain standards must comply with other standards
from which they are not specifically
excepted.
Exempt means an engine that does
not meet certain applicable standards
but may be produced and sold under
the terms allowed by a grant of exemption issued pursuant to Section 34.7 of this
part and part 11 of this chapter. Exempted engines must conform to regulatory conditions specified in the exemption as well as other applicable
regulations. Exempted engines are subject to the standards of this part even
though they are not required to comply
with the otherwise applicable requirements. Engines exempted with respect
to certain standards must comply with
other standards as a condition of the
exemption.
Exhaust emissions means substances
emitted into the atmosphere from the
exhaust discharge nozzle of an aircraft
or aircraft engine.
Fuel venting emissions means raw fuel,
exclusive of hydrocarbons in the exhaust emissions, discharged from aircraft gas turbine engines during all
normal ground and flight operations.
In-use aircraft gas turbine engine
means an aircraft gas turbine engine
which is in service.
Introduction date means the date of
manufacture of the first individual production engine of a given engine model
or engine type certificate family to be
certificated. Neither test engines nor
engines not placed into service affect
this date.
New aircraft turbine engine means an
aircraft gas turbine engine which has
never been in service.
Power setting means the power or
thrust output of an engine in terms of
kilonewtons thrust for turbojet and
turbofan engines or shaft power in
terms of kilowatts for turboprop engines.
Rated output (rO) means the maximum power/thrust available for takeoff at standard day conditions as approved for the engine by the Federal
Aviation Administration, including reheat contribution where applicable, but
excluding any contribution due to
water injection, expressed in kilowatts

or kilonewtons (as applicable), rounded
to at least three significant figures.
Rated pressure ratio (rPR) means the
ratio between the combustor inlet pressure and the engine inlet pressure
achieved by an engine operation at
rated output, rounded to at least three
significant figures.
Reference day conditions means the
reference ambient conditions to which
the gaseous emissions (HC and smoke)
are to be corrected. The reference day
conditions are as follows: Temperature
= 15 SectionC, specific humidity = 0.00629 kg
H2 O/kg of dry air, and pressure = 101325
Pa.
Sample system means the system
which provides for the transportation
of the gaseous emission sample from
the sample probe to the inlet of the instrumentation system.
Shaft power means only the measured
shaft power output of a turboprop engine.
Smoke means the matter in exhaust
emissions which obscures the transmission of light.
Smoke number (SN) means the
dimensionless term quantifying smoke
emissions.
Standard day conditions means the
following ambient conditions: temperature = 15 SectionC, specific humidity = 0.00634
kg H2O/kg dry air, and pressure =
101.325 kPa.
Taxi/idle (in) means those aircraft operations involving taxi and idle between the time of landing roll-out and
final shutdown of all propulsion engines.
Taxi/idle (out) means those aircraft
operations involving taxi and idle between the time of initial starting of
the propulsion engine(s) used for the
taxi and the turn onto the duty runway.
Tier, as used in this part, is a designation related to the NOX emission
standard for the engine as specified in
Section 34.21 or Section 34.23 of this part (e.g., Tier 0).
[Doc. No. 25613, 55 FR 32861, Aug. 10, 1990; 55
FR 37287, Sept. 10, 1990, as amended by Amdt.
34-3, 64 FR 5558, Feb. 3, 1999; Amdt. 34-5, 77
FR 76849, Dec. 31, 2012; Amdt. 34-5A, 78 FR
63016, Oct. 23, 2013]

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