The units and components which provide a means of preventing or disposing of formation of ice and rain on various parts of the aircraft.

Make sure the area for test is free of any people.

Set the STANDBY POWER switch on the P5-5 panel to the OFF position.

Guarantee that all means we use meet the requirement of airworthiness.

Use proper equipment to do the inspection, instead of visual check.

Keep quiet to avoid missing the sound of signal.

No one is allowed to access the airplane during its functional test.

Perform preliminary inspection of all articles that are maintained.

Label the tabs with section numbers or titles.

Visually examine the assembly to determine extent of damage.

Examine the tubing for worn areas.