14 CFR § 13.227 - Expert or opinion witnesses.

---
identifier: "/us/cfr/t14/s13.227"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 13.227 - Expert or opinion witnesses."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "13.227"
section_name: "Expert or opinion witnesses."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "B"
subchapter_name: "PROCEDURAL RULES"
part_number: "13"
part_name: "INVESTIGATIVE AND ENFORCEMENT PROCEDURES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "18 U.S.C. 6002; 28 U.S.C. 2461 note; 49 U.S.C. 106(g), 5121-5124, 40113-40114, 44103-44106, 44701-44704, 44709-44710, 44713, 44725, 44742, 44802 (note), 46101-46111, 46301, 46302 (for a violation of 49 U.S.C. 46504), 46304-46316, 46318-46320, 46501-46502, 46504, 46507, 47106, 47107, 47111, 47122, 47306, 47531-47532; 49 CFR 1.83."
regulatory_source: "Docket No. 18884, 44 FR 63723, Nov. 5, 1979, unless otherwise noted."
cfr_part: "13"
---


# 13.227 Expert or opinion witnesses.

An employee of the agency may not be called as an expert or opinion witness for any party other than the FAA in any proceeding governed by this subpart. An employee of a respondent may not be called by an agency attorney as an expert or opinion witness for the FAA in any proceeding governed by this subpart to which the respondent is a party.