Advisory
Circular
Subject: ELECTRICAL BONDING
AND PROTECTION AGAINST STATIC
ELECTRICITY
Date: 10/22/07
Initiated by: ANM-100
AC No: 25.899-1
1. PURPOSE. This advisory circular (AC) provides guidance for demonstrating compliance
with the transport category airplane certification requirements of § 25.899 Electrical bonding
and protection against static electricity.
2. APPLICABILITY.
a. The guidance provided in this document is directed to airplane manufacturers, modifiers,
foreign regulatory authorities, Federal Aviation Administration (FAA) transport airplane
type certification engineers, and designees.
b. This material is neither mandatory nor regulatory in nature and does not constitute a
regulation. It describes acceptable means, but not the only means, for demonstrating
compliance with the applicable regulations. We will consider other methods of
demonstrating compliance that an applicant may elect to present. While these guidelines
are not mandatory, they are derived from extensive FAA and industry experience in
determining compliance with the relevant regulations. On the other hand, if we become
aware of circumstances that convince us that following this AC would not result in
compliance with the applicable regulations, we will not be bound by the terms of this AC,
and we may require additional substantiation as a basis for finding compliance.
c. This material does not change or create any additional regulatory requirements nor does
it authorize changes in or permit deviations from existing regulatory requirements.
d. Terms such as “shall” or “must” are used in this AC only in the sense of ensuring
applicability of this particular method of compliance when the acceptable method of
compliance described herein is used.
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