AD 2024-20-05: Columbia Helicopters, Inc., and Restricted Category Model CH-47D Helicopters

This AD applies to the helicopters identified in paragraphs (c)(1) and (2) of this AD with a flight control rigid connecting link (link) part number (P/N) 145C3340-10 having manufacturing CAGE code 59213, a link P/N 145C3340-10 having an unknown manufacturing CAGE code, a link with an unknown P/N having manufacturing CAGE code 59213, or a link with an unknown P/N and unknown manufacturing CAGE code, installed. (1) Columbia Helicopters, Inc., Model 234 helicopters, certificated in any category; and (2) Restricted category Model CH-47D helicopters; current type certificate holders include, but are not limited to, Billings Flying Service, Inc., Columbia Helicopters, Inc, Tandem Rotor, LLC, and Unical Air Inc. Note 1 to paragraph (c): A flight control rigid connecting link is also referred to as a rigid connecting link in related material. Note 2 to paragraph (c): The P/N and manufacturing CAGE code information may be located on the tube of the link assembly. Information about the location of the P/N and manufacturing CAGE code is available in Boeing Service Bulletin CH-47, No. 145-67-1047, dated May 22, 2024.