US Army Signal Corps
Maintenance & Repair

 

System of maintenance

Signals Corps maintenance follows the basic army five-echelon system. 
The first and second echelons of repair, both being within the using organization, are known as "Organizational Maintenance". 
The third, fourth and fifth echelons of maintenance are furnished by "Service Units"
Third Echelon     - by Division, Corps, or Army.
Fourth Echelon   - by Army
Fifth Echelon      - by Communications Zone.
First Echelon, Operator Maintenance.

Use, care, operation, adjustment, minor repairs and "plug-in" parts replacement of running parts.
Second Echelon, Using Unit Maintenance.

Unit mechanic of the using unit, such as radio repairmen, etc. Preventive maintenance, technical advice and inspection. Repair within limits of skill and replacements within stock of organizational spare parts.
Third Echelon, Mobile Repair Shop Maintenance.

Mobile repair units of Signal Repair Companies, Service groups, etc. Overhaul and repair, and carry limited stock of emergency repair parts.
Fourth Echelon, Semi-Fixed Repair Shop Maintenance.

Repair Platoon or signal depot company and signal depot company aviation, at Army repair shops. Stock of repair parts and assemblies to serve all forward echelons.
Fifth Echelon, Fixed Repair Shop Maintenance.

Base Depot repair shops. Recondition material by reclamation and limited manufacture, mainly for return to Supply Depot stock.