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United States Department of Transportation United States Department of Transportation

AC 43-217 - Anticollision Light Maintenance (ACLM)

Document Information

Anticollision Light Maintenance (ACLM)
Date issued
Office of Primary Responsibility

This AC provides guidance in developing an anticollision light maintenance program. This AC describes an acceptable means, but not the only means, to comply with Title 14 of the Code of Federal Regulations (14 CFR). However, if you use the means described in this AC to show compliance, you must follow it in all important respects.

Anticollision lights are intended to aid in collision avoidance while on the ground and in the air. Certification standards dictate field of coverage, flash characteristics, color, and light intensity. To maximize their effectiveness, they are strategically placed to eliminate lapses in the field of coverage, usually at extremities of the aircraft. These locations tend to place the lights in extreme environmental conditions and subject to lightning strike and ground damage.