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Inspection of the ignition system normally includes the following: 

• Ignition lead terminal inspection; ceramic terminal should be free of arcing, carbon tracking and cracks. 

• The grommet seal should be free of flashover and carbon tracking. [Figure 4-71] 

• The wire insulation should remain flexible with no evidence of arcing through the insulation. 

• Inspect the complete system for security of component mounting, shorts or high-voltage arcing, and loose connections. 

## Check System Operation 

The igniter can be checked by listening for a snapping noise as the engine begins to turn, driven by the starter. Though the following procedure is not common practice and should only be used when the maintenance manual suggests it as an alternative method, the igniter can also be checked by removing it and activating the start cycle, noting the spark across the igniter. 

CAUTION: The high energy level and voltage associated 

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with turbine ignition systems can cause injury or death to personnel coming into contact with the activated system. 

## Repair 

Tighten and secure as required and replace faulty components and wiring. Secure, tighten, and safety as required. 

## Removal, Maintenance, and Installation of Ignition System Components 

The following instructions are typical procedures suggested by many gas turbine manufacturers. These instructions are applicable to the engine ignition components. Always consult the applicable manufacturer’s instructions before performing any ignition system maintenance. 

## Ignition System Leads 

