[Code of Federal Regulations]
[Title 14, Volume 1]
[Revised as of January 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 14CFR34.60]

[Page 772-773]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 34--FUEL VENTING AND EXHAUST EMISSION REQUIREMENTS FOR TURBINE ENGINE POWERED AIRPLANES--Table of Contents
 
    Subpart G--Test Procedures for Engine Exhaust Gaseous Emissions 
               (Aircraft and Aircraft Gas Turbine Engines)
 
Sec. 34.60  Introduction.


    (a) Except as provided under Sec. 34.5, the procedures described in 
this subpart shall constitute the test program used to determine the 
conformity of new aircraft gas turbine engines with the applicable 
standards set forth in this part.
    (b) The test consists of operating the engine at prescribed power 
settings on an engine dynamometer (for engines producing primarily shaft 
power) or thrust measuring test stand (for engines producing primarily 
thrust). The exhaust gases generated during engine operation must be 
sampled continuously for specific component analysis through the 
analytical train.
    (c) The exhaust emission test is designed to measure concentrations 
of hydrocarbons, carbon monoxide, carbon dioxide, and oxides of 
nitrogen, and to determine mass emissions through calculations during a 
simulated aircraft landing-takeoff cycle (LTO). The LTO cycle is based 
on time in mode data during high activity periods at major airports. The 
test for propulsion engines consists of at least the following four 
modes of engine operation: taxi/idle, takeoff, climbout, and approach. 
The mass emission for the modes are combined to yield the reported 
values.
    (d) When an engine is tested for exhaust emissions on an engine 
dynamometer or test stand, the complete engine (with all accessories 
which might reasonably be expected to influence emissions to the 
atmosphere installed and functioning), shall be used if not otherwise 
prohibited by Sec. 34.62(a)(2). Use of service air bleed and shaft power 
extraction to power auxiliary, gearbox-mounted components required to 
drive aircraft systems is not permitted.
    (e) Other gaseous emissions measurement systems may be used if shown 
to yield equivalent results and if approved

[[Page 773]]

in advance by the Administrator or the Administrator of the EPA.

[Doc. No. 25613, 55 FR 32861, Aug. 10, 1990, as amended by Amdt. 34-3, 
64 FR 5559, Feb. 3, 1999]