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Sun, Sep 12, 2004

Urgent AD (CASA): Kawasaki BK 117 Series Helicopters

A D/JBK 117/6, Amdt 3, Main Rotor Blade 11/2004 DM

Applicability: Model BK 117, BK117A-3, BK117A-4, BK117B-1, BK117B-2, and BK117C-1 helicopters; all main rotor blade part numbers.

Requirement: Perform an inspection in accordance with Kawasaki BK 117 Service Bulletin KSB-117-115-2, dated 30 June 2004, or a later JCAB approved revision.

Note: JCAB AD TCD-4114-2-2004 refers.

Compliance: Unless the initial inspection has already been accomplished on an affected blade, within 5 flight hours after 15 September 2004. Inspect thereafter at intervals not to exceed 50 flight hours. This Amendment becomes effective on 15 September 2004.

Background: In response to incidents, the manufacturer recommended an immediate inspection for bulging on the upper and lower surfaces of the main rotor blades in the area of the outboard lead balance weight. Amendment 1 referenced the JCAB AD and the Kawasaki service bulletin rather than the LBA AD and the MBB service bulletin of the initial issue. Amendment 2 introduced an additional blade part number to applicability. Amendment 3 is issued in response to a new JCAB AD, which expands applicability
to all main rotor blade part numbers. The original issue of this Airworthiness Directive became effective on 13 October 1994.

FMI: http://casa.gov.au/avreg/aircraft/ad/ADfiles/Rotor/JBK117/JBK117-006.pdf

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