Page:NTSB RAR-72-5.pdf/27

 motor to determine the amount of vibration. If, in his opinion, either the noise or vibrations were excessive, the motor was returned for further attention.

A record was maintained of repairs per- formed, material used, and the results of final tests for all traction motors. Copies of some of the reports of the traction motor involved in this accident are contained in Appendix E. It was reported improperly at the time the traction motor was repaired that the armature bearings were new

K Applicable Instructions and Regulations for Locomotive Maintenance

Maintenance instructions have been compiled by EMD for locomotive units of their design. Copies of these instructions are provided to the railroads for their use in maintaining the loco- motive units The instructions, which are written for most of the component parts of the units, cover traction motors of various designs Companies engaged in repairing various parts for these locomotive units generally comply with the instructions when making such repairs The Chandeysson Electric Company repaired traction motors to the builders' specifications, which included any maintenance instructions

EMD Maintenance Instructions recommend that when a traction motor is removed from a locomotive unit, the traction motor should be operated and an audible check made of the armature hearings to detect excessive noise. This instruction serves as a means for detecting faulty bearings. The Chandeysson Electric Company tested all repaired motors at speeds of 1,000 r.p.m., 1,500 r.p m, and 2,000 r.p m.

ICRR uses EMD Maintenance Instructions in establishing procedures for maintaining the units purchased from EMD

Title 49, Code of Federal Regulations (CFR), Part 230 includes, the following regulations applicable to this accident:

"230.201 (d); Slipping or sliding wheel alarms

Means shall be provided whereby alarms and indications of either slipping or sliding driving wheels on any unit in a locomotive used in road service will be shown in the enginemen’s compartment of the con- trolling unit.

Interpretation: This rule does not require both an audible alarm and a visible indica- tion, but does require that either the one or the other, must be provided

The requirements of the rule are satisfied by a device which shows when either slipping or sliding occurs, even though not distinguishing between the one and the other

"230.203 Trip or daily inspection.

(a) Each locomotive unit when used in road service. shall be inspected at least once every 24 hours,. . .A report of the above inspections shall be made on an approved from to the proper representative of the railroad whether such locomotive units need repairs or not. If any defects exist which constitute a violation of the Loco- motive Inspection Act, or any Federal Railroad Administration rules and regula- tions thereunder, such defect shall be repaired before the unit is again used and proper notation made on the report to indicate that such repairs have been made. This report shall be approved by the designated representative of the railroad and shall then be filed in the office of the railroad at the terminal at which the unit is cared for.

"230 262 Engines and accessories

(a) Tagging for repairs Internal com- bustion engines shall be maintained in a Safe and suitable condition For service. Whenever any internal combustion engine 21