Those units and components are used to generate, control, distribute electrical current to ignite the fuel air mixture in the cylinders of reciprocating engines or in the combustion chambers or thrust augmentors of turbine engines.

Bleed the system before you disconnect the components.

Do not loosen the nut to align it.

Database synchronization is in progress.

Install the valve and the correct gasket.

Make sure that the latch is fully engaged.

Hold the cylinder tightly.

Examine the seal for defects.

The control unit is installed aft of the cockpit.

Install the manifold.

Documents must be readily revisable.