Remove any interior paint in the area where the backing plate is placed to assure a good ground. An alternate method for providing electrical bonding is through the mounting screws, which attach to a backing plate inside the aircraft skin. To accomplish this, the aircraft paint in the mounting area will need to be removed and the surface alodined to protect aluminum against corrosion. The electrical bonding of the antennas to the aircraft skin is best accomplished by direct metal-tometal contact of the antenna base to the aircraft skin. This, in turn, may cause erratic navigational readings or signal drop out. If this is not done properly, antenna performance characteristics may become distorted and nulls may appear in the antenna radiation pattern.

Aircraft Skin Surface and Mounting Preparation The electrical bonding of the antenna to the aircraft ground is highly important. 020” appear between the base plate and mounting surface, use of a mounting saddle is recommended. DO NOT over torque the mounting screws in an attempt to reduce gaps between the antenna base plate and aircraft mounting surface. Minor aircraft skin curvature can be accommodated with the use of a Comant gasket where supplied. A flat surface is the desired antenna mounting location. Mounting Location The specific mounting location is very important due to curvatures and uneven surfaces encountered on various aircraft skins. On any aircraft, antennas should not be mounted in the proximity of engine exhaust. Contact Comant for further information on these types of antennas. CAUTION: VOR/LOC/GS antennas have specific limitations and instructions. When possible, keep antennas at least 36” from any other antenna. Antenna locations on aircraft that provide unobstructed line-of-sight views of the transmitted or received signals are preferred. General Location The location of any antenna system on the aircraft is very important. A copy of the FAA Advisory Circular can be obtained at Look for Advisory Circulars under the Regulatory/Advisory heading on the FAA home page. Refer to FAA Advisory Circular 43.13-2b for General installation guidelines.

Comant Industries, 577 Burning Tree Road Fullerton, California 92833, USA Tel: +1 7 _ Fax: +1 7 General Antenna Installation Guidelines General Information Installations must be made by qualified personnel, and in accordance with Federal Regulations.

Comant antenna installation manual