[Code of Federal Regulations]
[Title 49, Volume 4]
[Revised as of October 1, 2007]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR230.39]

[Page 476-477]
 
                        TITLE 49--TRANSPORTATION
 
       CHAPTER II--FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF 
                             TRANSPORTATION
 
PART 230_STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS--Table of 
 
                   Subpart B_Boilers and Appurtenances
 
Sec.  230.39  Broken staybolts.

    (a) Maximum allowable number of broken staybolts. No boiler shall be 
allowed to remain in service with two broken staybolts located within 24 
inches of each other, as measured inside the firebox or combustion 
chamber on a straight line. No boiler shall be allowed to remain in 
service with more than 4 broken staybolts inside the entire firebox and 
combustion chamber, combined.
    (b) Staybolt replacement. Broken staybolts must be replaced during 
the 31 service day inspection, if detected at that time. Broken 
staybolts detected in between 31 service day inspections must be 
replaced no later than 30 calendar days from the time of detection. When 
staybolts 8 inches or less in

[[Page 477]]

length are replaced, they shall be replaced with bolts that have 
telltale holes \3/16\ inch to \7/32\ inch in diameter and at least 1\1/
4\ inches deep at each end, or that have telltale holes \3/16\ inch to 
\7/32\ inch in diameter their entire length. At the time of replacement 
of broken staybolts, adjacent staybolts shall be inspected.
    (c) Assessment of broken staybolts. Telltale holes leaking, plugged, 
or missing shall be counted as broken staybolts.
    (d) Prohibited methods of closing telltale holes. Welding, forging, 
or riveting broken staybolt ends is prohibited as a method of closing 
telltale holes.