If contamination causes a blockage of more than 50 percent of the holes, then clean the holes on the rear of the display units.

Examine all components, hydraulic fittings and connecting lines.

Airworthiness Directive is procedure that must be used when performing maintenance on an aircraft.

This Section shall contain a legible statement in a prominent location to the effect that the Airworthiness Limitations Section is FAA approved.

Navigation system information is displayed on the primary flight displays

In some cases, wires are color coded and these should be indicated on the wiring diagram.

For Handbooks that are not FAA Approved Airplane Flight Manuals, make the following statements.

In an emergency, obey the cabin crew without question.

Relatively simple units may not require description and operation, and/or troubleshooting information.

Make sure that equipment is cleared of this area.

Each page shall bear a page number and date of issue or revision at the bottom.