First try to install the adaptor with the shortest threaded area.

Note that alterations or repairs to airplane must be accomplished by licensed personnel.

When the engine RPM decreases to 500, stop the engine.

Rinse the basin with water.

Saturate the element for two hours.

The valve flaps are semicircular.

Disconnect the connection upstream of the valve.

Make sure you hear the boarding music when you press the button.

To get the correct clearance, add special shims, as necessary.

A small child should use an approved child restraint seat.

Do these steps to replace the light assembly.