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

This information shall be presented along with information to aid recognition of icing conditions which may exceed the certified capabilities of the aircraft and its ice protection system.

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

Warnings and cautions shall precede the text to which each applies, but notes may precede or follow applicable text depending on the material to be highlighted.

Format and layout is to be determined by the CAP producer, recognizing that it is desirable that the format and layout be similar to the producer＇s existing documents.

The backside of the title page should be left blank to avoid the need for revision and potential loss of the inserted airplane serial and registration numbers.

These ALIs are mandatory and cannot be changed or deleted without the approval of the FAA office that is responsible for the airplane model Type Certificate, or applicable regulatory agency.

Revisions, additions and deletions shall be identified by a vertical black line along the outside of the page opposite only that portion of the printed matter that was changed.

This method is recommended as minimizing errors of distribution, and also informs owners of the availability of systems and equipment.

The airplane general arrangement shall be illustrated with a scale line drawing consisting of plan, side and front views presented in a vertical sequence upon a single page.

A certificated pilot who owns or operates an airplane not used as an air carrier is authorized by FAR Part 43 to perform limited preventive maintenance on his airplane.