888 

14 CFR Ch. I (1–1–14 Edition) 

§ 34.1 

federal

lregister/codeloflfederallregulations/ 

ibr

llocations.html. 

Class TP means all aircraft turboprop 

engines. 

Class TF means all turbofan or tur-

bojet aircraft engines or aircraft en-
gines designed for applications that 
otherwise would have been fulfilled by 
turbojet and turbofan engines except 
engines of class T3, T8, and TSS. 

Class T3 means all aircraft gas tur-

bine engines of the JT3D model family. 

Class T8 means all aircraft gas tur-

bine engines of the JT8D model family. 

Class TSS means all aircraft gas tur-

bine engines employed for propulsion 
of aircraft designed to operate at su-
personic flight speeds. 

Commercial aircraft engine means any 

aircraft engine used or intended for use 
by an ‘‘air carrier’’ (including those en-
gaged in ‘‘intrastate air transpor-
tation’’) or a ‘‘commercial operator’’ 
(including those engaged in ‘‘intrastate 
air transportation’’) as these terms are 
defined in Title 49 of the United States 
Code and Title 14 of the Code of Federal 
Regulations. 

Commercial aircraft gas turbine engine 

means a turboprop, turbofan, or tur-
bojet commercial aircraft engine. 

Date of manufacture of an engine is 

the date the inspection acceptance 
records reflect that the engine is com-
plete and meets the FAA approved type 
design. 

Derivative engine for emissions certifi-

cation purposes means an engine that 
has the same or similar emissions char-
acteristics as an engine covered by a 
U.S. type certificate issued under 14 
CFR part 33. These characteristics are 
specified in § 34.48. 

Emission measurement system means 

all of the equipment necessary to 
transport the emission sample and 
measure the level of emissions. This in-
cludes the sample system and the in-
strumentation system. 

Engine model means all commercial 

aircraft turbine engines which are of 
the same general series, displacement, 
and design characteristics and are ap-
proved under the same type certificate. 

Excepted,  as used in § 34.9, means an 

engine that may be produced and sold 
that does not meet otherwise applica-
ble standards. Excepted engines must 

conform to regulatory conditions speci-
fied for an exception in § 34.9. Excepted 
engines are subject to the standards of 
this part even though they are not re-
quired to comply with the otherwise 
applicable requirements. Engines ex-
cepted with respect to certain stand-
ards 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 exemp-
tion issued pursuant to § 34.7 of this 
part and part 11 of this chapter. Ex-
empted engines must conform to regu-
latory conditions specified in the ex-
emption as well as other applicable 
regulations. Exempted engines are sub-
ject to the standards of this part even 
though they are not required to comply 
with the otherwise applicable require-
ments. 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 ex-
haust emissions, discharged from air-
craft 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 pro-
duction 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 en-
gines. 

Rated output (rO) means the max-

imum power/thrust available for take-
off at standard day conditions as ap-
proved for the engine by the Federal 

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