751 

Federal Aviation Administration, DOT 

§ 34.11 

aircraft or engine if such aircraft or en-
gine has been exempted from such 
standard under this part. 

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

§ 34.9

Exceptions. 

(a) 

Spare engines. Certain engines 

that meet the following description are 
excepted: 

(1) This exception allows production 

of an engine for installation on an in- 
service aircraft. A spare engine may 
not be installed on a new aircraft. 

(2) Each spare engine must be iden-

tical to a sub-model previously certifi-
cated to meet all applicable require-
ments. 

(3) A spare engine may be used only 

when the emissions of the spare do not 
exceed the certification requirements 
of the original engine, for all regulated 
pollutants. 

(4) No separate approval is required 

to produce spare engines. 

(5) The record for each engine ex-

cepted under this paragraph (c) must 
indicate that the engine was produced 
as an excepted spare engine. 

(6) Engines produced under this ex-

ception must be labeled ‘‘EXCEPTED 
SPARE’’ in accordance with § 45.13 of 
this chapter. 

(b) On and after July 18, 2012, and be-

fore August 31, 2013, a manufacturer 
may produce up to six Tier 4 compliant 
engines that meet the NO

X

standards of 

paragraph (d)(1)(vi) of this section 
rather than § 34.23(a)(2). No separate ap-
proval is required to produce these en-
gines. Engines produced under this ex-
ception are to be labeled ‘‘COMPLY’’ in 
accordance with § 45.13 of this chapter. 

[Doc. No. FAA–2012–1333, 77 FR 76850, Dec. 31, 
2012] 

Subpart B—Engine Fuel Venting 

Emissions (New and In-Use 
Aircraft Gas Turbine Engines) 

§ 34.10

Applicability. 

(a) The provisions of this subpart are 

applicable to all new aircraft gas tur-
bine engines of classes T3, T8, TSS, and 
TF equal to or greater than 36 kN (8,090 
lb) rated output, manufactured on or 
after January 1, 1974, and to all in-use 

aircraft gas turbine engines of classes 
T3, T8, TSS, and TF equal to or greater 
than 36 kN (8,090 lb) rated output man-
ufactured after February 1, 1974. 

(b) The provisions of this subpart are 

also applicable to all new aircraft gas 
turbine engines of class TF less than 36 
kN (8,090 lb) rated output and class TP 
manufactured on or after January 1, 
1975, and to all in-use aircraft gas tur-
bine engines of class TF less than 36 kN 
(8,090 lb) rated output and class TP 
manufactured after January 1, 1975. 

[Doc. No. FAA–2012–1333, 77 FR 76850, Dec. 31, 
2012] 

§ 34.11

Standard for fuel venting emis-

sions. 

(a) No fuel venting emissions shall be 

discharged into the atmosphere from 
any new or in-use aircraft gas turbine 
engine subject to the subpart. This 
paragraph is directed at the elimi-
nation of intentional discharge to the 
atmosphere of fuel drained from fuel 
nozzle manifolds after engines are shut 
down and does not apply to normal fuel 
seepage from shaft seals, joints, and 
fittings. 

(b) Conformity with the standard set 

forth in paragraph (a) of this section 
shall be determined by inspection of 
the method designed to eliminate these 
emissions. 

(c) As applied to an airframe or an 

engine, any manufacturer or operator 
may show compliance with the fuel 
venting and emissions requirements of 
this section that were effective begin-
ning February 1, 1974 or January 1, 
1975, by any means that prevents the 
intentional discharge of fuel from fuel 
nozzle manifolds after the engines are 
shut down. Acceptable means of com-
pliance include one of the following: 

(1) Incorporation of an FAA-approved 

system that recirculates the fuel back 
into the fuel system. 

(2) Capping or securing the pressur-

ization and drain valve. 

(3) Manually draining the fuel from a 

holding tank into a container. 

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