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Tue, May 05, 2009

Emergency AD (NZ): Bell 407 Series Helicopters

AD NUMBER: DCA/BELL407/47

MANUFACTURER: Bell 407 Series Helicopters
SUBJECT: Airworthiness Directive DCA/BELL407/47

SUMMARY: This emergency AD is prompted by the manufacturer and Transport Canada reporting that during a recent preflight inspection it was found that the swashplate link assembly bearing P/N 406-310-403-101 had moved in the lever race and come into contact with the swashplate support. This AD requires an inspection of the anti-drive link assembly to ensure the bearing is correctly staked.

To prevent failure of the anti-drive link assembly P/N 406-010-432-101 due to possible movement of bearing P/N 406-310-403-101 which could result in loss of aircraft control, accomplish the following:

Inspect the anti-drive link assembly P/N 406-010-432-101 to ensure the bearing P/N 406-310-403-101 is correctly staked in the link assembly per Bell Helicopter ASB 407-09-87 dated 27 March 2009 or later Transport Canada approved revisions.

Correct any defects found per ASB 407-09-87 before further flight. (Transport Canada AD CF-2009-14 refers)

COMPLIANCE: Within the next 10 hours TIS or by 6 June 2009 whichever is the sooner, unless previously accomplished.

FMI: www.caa.govt.nz/Airworthiness_Directives/Emergency_Airworthiness_Directives/DCA_Bell407_47.pdf

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