[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.40]

[Page 330]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230--STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of Contents
 
                  Subpart B--Boilers and Appurtenances
 
Sec. 230.40  Time and method of staybolt testing.

    (a) Time of hammer testing--(1) General. All staybolts shall be 
hammer tested at every 31 service day inspection, except as provided in 
paragraph (a)(2) of this section. All staybolts also shall be hammer 
tested under hydrostatic pressure any time hydrostatic pressure above 
the MAWP specified on the boiler specification form (FRA Form No. 4), is 
applied to the boiler. (See appendix B of this part.)
    (2) Exception for inaccessible staybolts. The removal of brickwork 
or grate bearers for the purpose of hammer testing staybolts during each 
31 service day inspection will not be required if the staybolts behind 
these structural impediments have a telltale hole 3/16 inch to 7/32 inch 
in diameter their entire length. Whenever the brickwork or grate bearers 
are removed for any other reason, however, the bolts shall be inspected 
at that time.
    (b) Method of hammer testing. If staybolts are tested while the 
boiler contains water, the hydrostatic pressure must be not less than 95 
percent of the MAWP. The steam locomotive owner and/or operator shall 
tap each bolt with a hammer and determine broken bolts from the sound or 
the vibration of the sheet. Whenever staybolts are tested while the 
boiler is not under pressure, such as during the 31 service day 
inspection, the staybolt test must be made with all the water drained 
from the boiler.