WASHINGTON, April 14 -- Federal Aviation Administration has issued a proposed rule called: Airworthiness Directives; Columbia Helicopters, Inc. and Restricted Category Model CH-47D Helicopters.
The proposed rule was published in the Federal Register on April 14 by Steven W. Thompson, Acting Deputy Director, Compliance & Airworthiness Division, Aircraft Certification Service.
Summary: The FAA proposes to adopt a new airworthiness directive (AD) for all Columbia Helicopters, Inc. Model 234 helicopters and all Restricted Category Model CH-47D helicopters. This proposed AD was prompted by reports of corrosion detected on certain flight control rigid connecting links (connecting link). This proposed AD would require repetitive borescope inspec...