[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: 14CFR33.57]

[Page 744-745]
 
                     TITLE 14--AERONAUTICS AND SPACE
 
CHAPTER I--FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
 
PART 33--AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES--Table of Contents
 
         Subpart D--Block Tests; Reciprocating Aircraft Engines
 
Sec. 33.57  General conduct of block tests.

    (a) The applicant may, in conducting the block tests, use separate 
engines of identical design and construction in the vibration, 
calibration, detonation, endurance, and operation tests, except that, if 
a separate engine is used for the endurance test it must be subjected to 
a calibration check before starting the endurance test.
    (b) The applicant may service and make minor repairs to the engine 
during the block tests in accordance with

[[Page 745]]

the service and maintenance instructions submitted in compliance with 
Sec. 33.4. If the frequency of the service is excessive, or the number 
of stops due to engine malfunction is excessive, or a major repair, or 
replacement of a part is found necessary during the block tests or as 
the result of findings from the teardown inspection, the engine or its 
parts may be subjected to any additional test the Administrator finds 
necessary.
    (c) Each applicant must furnish all testing facilities, including 
equipment and competent personnel, to conduct the block tests.

[Doc. No. 3025, 29 FR 7453, June 10, 1964, as amended by Amdt. 33-6, 39 
FR 35466, Oct. 1, 1974; Amdt. 33-9, 45 FR 60181, Sept. 11, 1980]