[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR87.60]

[Page 10]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 87--CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES--Table of Contents
 
    Subpart G--Test Procedures for Engine Exhaust Gaseous Emissions 
               (Aircraft and Aircraft Gas Turbine Engines)
 
Sec. 87.60  Introduction.


    (a) Except as provided under Sec. 87.5, the procedures described in 
this subpart shall be the test program 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 are sampled 
continuously for specific component analysis through the analytical 
train.
    (c) The exhaust emission test is designed to measure hydrocarbons, 
carbon monoxide, carbon dioxide, and oxides of nitrogen concentrations, 
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 shall be used with all 
accessories which might reasonably be expected to influence emissions to 
the atmosphere installed and functioning, if not otherwise prohibited by 
Sec. 87.62(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 in advance by the 
Administrator or the Secretary.

[47 FR 58470, Dec. 30, 1982, as amended at 49 FR 31875, Aug. 9, 1984; 62 
FR 25366, May 8, 1997]