Page:NTSB - Railroad Accident Report - Derailment on May 25, 1989.djvu/4

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CONTENTS

EXECUTIVE SUMMARY
vi
 
INVESTIGATION
Events Preceding the Train Derailment
1
 Loading of Hopper Cars
1
 Preparing the Shipper’s Bill of Lading
3
 Activities of Extra 7551 East
5
 Activities of Helper Unit
8
 Movement of Extra 7551 East from Oban to Hiland
8
The Train Derailment
8
Emergency Response to Train Derailment
9
Wreckage Clearance/Pipeline Surveillance Operations Following the Train Derailment
17
 May 12, 1989
17
 May 13, 1989
20
 May 14, 1989
25
 May 15 and 16, 1989
25
 May 17, 18, and 19, 1989
30
Events Preceding the Pipeline Rupture
31
Pipeline Rupture
31
 Pipeline Operations on May 25, 1989
31
 Witnesses’ Observations
33
Emergency Response to Pipeline Rupture
33
Pipeline Surveillance Operations
35
Injuries
37
Damages
37
 Train Derailment
37
 Pipeline Rupture
39
 Damage to the Pipeline
39
Track and Signal Information
42
 Track
42
 Signals
43
Train Information
43
 Locomotive Units
43
 Hopper Cars
44
Mechanical Information
45
 Use of Dynamic Brakes
45
 Maintenance Reports and Reporting of Defective Locomotive Units
46
 Recovering Dynamic Brakes
47
 FRA’s Position Regarding Functioning Dynamic Brakes
48
Southern Pacific’s Method of Operation
48
 Air Brake Rules and Timetable Instructions
48
 Communication Between Head end and Helper Engineers
53
 Tonnage Information for Cars
53

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