RAPIDLY EMPLACED BRIDGE (REB)
NSN 5420-01-481-3959 P/N 12480471
INTRODUCTION TO TROUBLESHOOTING
Operation of a deadlined REB without preliminary inspection prior
to performing troubleshooting procedures may result in damage to
equipment or injury to personnel.
a. This chapter provides the necessary troubleshooting procedures to diagnose mechanical, electrical,
hydraulic system, and Launch Power Unit (LPU) engine malfunctions of the REB.
b. The symptom indexes have their own work package numbers and are used to identify the malfunction
and locate the troubleshooting procedure to diagnose the problem.
c. Each troubleshooting procedure lists a description of the malfunction followed by a step or sequence of
steps to check the operation of a component. Then, in the order of probability, substeps instruct the
user to determine if a condition exists through a check, inspection, or test. Each step or substep is
followed by the corrective action required to solve the malfunction.
d. Prior to performing any troubleshooting procedure, observe the following recommendations:
(1) Check the Equipment Inspection and Maintenance Worksheet, DA Form 2404, 5988-E, and
Maintenance Request Form, DA Form 5504, to find out why the equipment has been deadlined.
Note the operator's written description of the problem and, whenever possible, ask the operator
about the problem. This can save time and effort in diagnosing the malfunction.
(2) It is best not to assume the operator's diagnosis is correct, even if it sounds accurate. Always
perform the appropriate troubleshooting procedure(s) to verify the cause of the problem.
Performing a corrective action without proof of a fault wastes time and increases the
(3) Always first isolate the system where the malfunction occurs, then locate the component and
perform corrective action in the order listed.
(4) Use approved mechanical, electrical, hydraulic system, and LPU engine repair practices provided
in the technical manuals, field manuals, and technical bulletins listed in WP 0128 00 of this
(5) Use the approved special tools and test equipment to determine the known parameters for
isolating a fault.
(6) Fill out and attach an Exchange Tag, DA Form 2402, for any component that will be exchanged as
a core and turned in for repair or rebuilding at the source or national maintenance level.
This chapter lists the most common malfunctions that may occur. When a malfunction occurs that is
not listed in the Mechanical System Troubleshooting Symptom Index, WP 0005 00, Electrical
System Troubleshooting Symptom Index, WP 0007 00, Hydraulic System Troubleshooting Symptom