2007-19-52
FR doc E7-22416 · 72 FR 65221AD 2007-19-52Published 2007-11-20Effective 2007-12-05
Requires replacing each affected tail rotor blade (blade) with an airworthy blade with a serial number not listed in the Rotor Blades, Inc.
Full official abstract
This document publishes in the Federal Register an amendment adopting Airworthiness Directive (AD) 2007-19-52, which was sent previously to all known U.S. owners and operators of the specified Bell Helicopter Textron Canada Limited (BHTC) model helicopters by individual letters. This AD requires replacing each affected tail rotor blade (blade) with an airworthy blade with a serial number not listed in the Rotor Blades, Inc. (RBI), attachment to the BHTC Alert Service Bulletin (ASB), listed in the applicability section of this AD. This amendment is prompted by three incidents in which blade tip weights were slung from blades during flight causing significant vibration. The actions specified are intended to prevent loss of a blade tip weight, loss of a blade, and subsequent loss of control of the helicopter.
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