SAFETY PRACTICES

SAFETY PRACTICES

Working on a high voltage electrical/electronic system presents hazards such as:

  •  Electrical shock on contact with energized wiring
  •  Short circuits caused by metal tools dropped across electrical connections/conductors
  •  Explosions caused by electrical sparks in the presence of flammable vapors.

Working on fiber optic systems presents additional hazards such as damage to eyes or skin caused by exposure to invisible fiber optic laser light. Assessment of existing conditions, good judgment and common sense must be exercised by airline personnel.

Before Maintenance Work Starts

  • To prevent injury to personnel and damage to equipment during maintenance operations on electrically operated equipment, or while performing maintenance on one or more parts of the electrical/electronic systems, use these safety practices:
  • Identify the system that maintenance work is to be done on.
  • Open circuit breakers and switches to make sure that power has been cut off from system components.
  • Put this Warning Tag on the circuit breakers:  

After Maintenance Work Ends

  • Make sure that all switches and controls are in a position that prevents the accidental operation of a component.
  • Remove the warning tags and close the circuit breakers and switches that were opened before the work started.
  • Energize the system. 
  • Perform the necessary operational checks.
  • When the checks have been satisfactorily completed, return the switches and controls to their normal shutdown positions.
  • Before removing the external power connector at the external power panel, make sure that the external power source is switched off. 

When a circuit breaker trips or opens, do not attempt to reset or close the breaker until the discrepancy or malfunction that caused.

Consequently it is very important to carefully read warnings and cautions when you have to apply a procedure. In other words, it is strongly recommended to use warning notices when asked. In the safety practices of the ESPM (20-10-00), you can retrieve a typical tag that is dedicated to be printed on a red paper if needed.

 


 

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