Code of Federal Regulations - Title 14

893

Federal Aviation Administration, DOT

§ 34.21

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.

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.

Subpart C—Exhaust Emissions

(New Aircraft Gas Turbine En-
gines)

§ 34.20

Applicability.

The provisions of this subpart are ap-

plicable to all aircraft gas turbine en-
gines of the classes specified beginning
on the dates specified in § 34.21.

§ 34.21

Standards for exhaust emis-

sions.

(a) Exhaust emissions of smoke from

each new aircraft gas turbine engine of
class T8 manufactured on or after Feb-
ruary 1, 1974, shall not exceed a smoke
number (SN) of 30.

(b) Exhaust emissions of smoke from

each new aircraft gas turbine engine of
class TF and of rated output of 129 kN
(29,000 lb) thrust or greater, manufac-
tured on or after January 1, 1976, shall
not exceed

SN = 83.6 (rO)

¥0.274

(rO is in kN).

each new aircraft gas turbine engine of
class T3 manufactured on or after Jan-
uary 1, 1978, shall not exceed a smoke
number (SN) of 25.

(d) Gaseous exhaust emissions from

each new aircraft gas turbine engine
shall not exceed:

(1) For Classes TF, T3, T8 engines

greater than 26.7 kN (6,000 lb) rated
output:

(i) Engines manufactured on or after

January 1, 1984:

Hydrocarbons: 19.6 g/kN rO.

(ii) Engines manufactured on or after

July 7, 1997:

Carbon Monoxide: 118 g/kN rO.

(iii) Engines of a type or model of

which the date of manufacture of the
first individual production model was
on or before December 31, 1995, and for
which the date of manufacture of the
individual engine was on or before De-
cember 31, 1999 (Tier 2):

Oxides of Nitrogen: (40+2(rPR)) g/kN

rO.

(iv) Engines of a type or model of

which the date of manufacture of the
first individual production model was
after December 31, 1995, or for which

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