This AC provides guidance for towbar and towbarless movement of aircraft and applies to all operators under Title 14 of the Code of Federal Regulations (14 CFR) parts 91, 91 subpart K (part 91K), 121, 125, 129, and 135. The term “certificate holder (CH)” will be used throughout this document to represent “operators,” “air carriers,” and their agents.

There is no Title 14 of the Code of Federal Regulations (14 CFR) rule that specifically addresses aircraft ground handling, servicing, and marshalling; however, elements of these topics could be addressed under the following regulatory requirements: part 91, §§ 91.1073 and 91.1085; part 121, §§ 121.133, 121.135, and 121.137; part 135, §§ 135.21, 135.23, and 135.619 and appendix A; and part 139, § 139.329.