[Code of Federal Regulations]
[Title 40, Volume 30]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR1065.415]

[Page 666]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 1065_TEST PROCEDURES AND EQUIPMENT--Table of Contents
 
    Subpart E_Engine Selection, Preparation, and Service Accumulation
 
Sec. 1065.415  Durability demonstration.

    If the standard-setting part requires durability testing, you must 
accumulate service in a way that represents how you expect the engine to 
operate in use. You may accumulate service hours using an accelerated 
schedule, such as through continuous operation.
    (a) Maintenance. The following limits apply to the maintenance that 
we allow you to do on test engine:
    (1) You may perform scheduled maintenance that you recommend to 
operators, but only if it is consistent with the standard-setting part's 
restrictions.
    (2) You may perform additional maintenance only if we approve it in 
advance, as specified in Sec. 1065.410(b).
    (3) If your test engine has a major mechanical failure that requires 
you to take it apart, you may no longer use it as a test engine.
    (b) Emission measurements. You must measure emissions following two 
main requirements:
    (1) Perform emission tests to determine deterioration factors 
consistent with good engineering judgment. Evenly space any tests 
between the first and last test points throughout the durability period.
    (2) Perform emission tests following the provisions of this part and 
the standard-setting part.