14 CFR § 133.51 - Airworthiness certification.

---
identifier: "/us/cfr/t14/s133.51"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "14 CFR § 133.51 - Airworthiness certification."
title_number: 14
title_name: "Aeronautics and Space"
section_number: "133.51"
section_name: "Airworthiness certification."
chapter_name: "FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION"
subchapter_number: "G"
subchapter_name: "AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS"
part_number: "133"
part_name: "ROTORCRAFT EXTERNAL-LOAD OPERATIONS"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "49 U.S.C. 106(g), 40113, 44701-44702."
regulatory_source: "Docket 1529, 29 FR 603, Jan. 24, 1964, unless otherwise noted."
cfr_part: "133"
---


# 133.51 Airworthiness certification.

A Rotorcraft External-Load Operator Certificate is a current and valid airworthiness certificate for each rotorcraft type certificated under part 27 or 29 of this chapter (or their predecessor parts) and listed by registration number on a list attached to the certificate, when the rotorcraft is being used in operations conducted under this part.

[Docket 24550, 51 FR 40709, Nov. 7, 1986]