Code of Federal Regulations - Title 14

889

Federal Aviation Administration, DOT

§ 34.3

Aviation Administration, including re-
heat 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 pres-
sure 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

C, specific

humidity=0.00629 kg H

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 in-
strumentation system.

Shaft power means only the measured

shaft power output of a turboprop en-
gine.

Smoke means the matter in exhaust

emissions which obscures the trans-
mission of light.

Smoke number (SN) means the

dimensionless term quantifying smoke
emissions.

Standard day conditions means the

following ambient conditions: tempera-
ture = 15

C, specific humidity = 0.00634

kg H

O/kg dry air, and pressure =

101.325 kPa.

Taxi/idle (in) means those aircraft op-

erations involving taxi and idle be-
tween the time of landing roll-out and
final shutdown of all propulsion en-
gines.

Taxi/idle (out) means those aircraft

operations involving taxi and idle be-
tween the time of initial starting of
the propulsion engine(s) used for the
taxi and the turn onto the duty run-
way.

Tier, as used in this part, is a des-

ignation related to the NO

emission

standard for the engine as specified in
§ 34.21 or § 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]

§ 34.2

Abbreviations.

The abbreviations used in this part

have the following meanings in both
upper and lower case:
CO

Carbon dioxide

Carbon monoxide

EPA

United States Environmental

Protection Agency

FAA

Federal Aviation Administra-

tion, United States Department of
Transportation

g Gram(s)
HC

Hydrocarbon(s)

Horsepower

Hour(s)

water

Kilogram(s)

Kilojoule(s)

kN Kilonewton(s)
kW Kilowatt(s)
lb Pound(s)
LTO

Landing and takeoff

min

Minute(s)

Oxides of nitrogen

Pascal(s)

Rated output

rPR

Rated pressure ratio

sec

Second(s)

Shaft power

Smoke number

Temperature, degrees Kelvin

TIM

Time in mode

Degrees Celsius

Percent

[Doc. No. 25613, 55 FR 32861, Aug. 10, 1990, as
amended by Amdt. 34–3, 64 FR 5559, Feb. 3,
1999; Amdt. 34–5, 77 FR 76850, Dec. 31, 2012]

§ 34.3

General requirements.

(a) This part provides for the ap-

proval or acceptance by the Adminis-
trator or the Administrator of the EPA
of testing and sampling methods, ana-
lytical techniques, and related equip-
ment not identical to those specified in
this part. Before either approves or ac-
cepts any such alternate, equivalent,
or otherwise nonidentical procedures
or equipment, the Administrator or the
Administrator of the EPA shall consult
with the other in determining whether
or not the action requires rulemaking
under sections 231 and 232 of the Clean
Air Act, as amended, consistent with
the responsibilities of the Adminis-
trator of the EPA and the Secretary of
Transportation under sections 231 and
232 of the Clean Air Act.

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