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Fri, Mar 20, 2009

AD: Bell

AD NUMBER: 2009-07-52
MANUFACTURER: Bell
SUBJECT: Airworthiness Directive 2009-07-52
SUMMARY: This superseding Emergency Airworthiness Directive (AD) is being issued to correct the applicability of Emergency AD 2009-07-51.

We issued Emergency AD 2009-07-51 on March 17, 2009. The Emergency AD requires, before further flight, inspecting each cyclic control lever assembly (lever assembly) to determine if it is correctly installed and properly staked in the lever assembly. Replacing any bearing that is incorrectly installed or improperly staked in the lever assembly is also required before further flight. AD 2009-07-51 was prompted by a Transport Canada AD report of a bearing incorrectly installed in the copilot lever assembly. Investigation revealed that, although the inspection witness marks were applied on the bearing, it had not been properly staked during manufacture of the lever assembly. This condition, if not detected, could result in failure of a bearing, failure of a lever assembly, and subsequent loss of control of the helicopter

FMI: www.faa.gov/regulations_policies/airworthiness_directives/

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