AD/JBK 117/6 Amdt 6 - Main Rotor Blade (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/JBK 117/6 Amdt 5 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Kawasaki BK 117 Series Helicopters AD/JBK 117/6 Amdt 6 Main Rotor Blade 13/2008

Applicability: Model BK117, BK117A-3, BK117A-4, BK117B-1, BK117B-2, and BK117C-1 helicopters; equipped with main rotor blade part numbers 117-150041, 117-150051, 117-150071, 117-150081, 117-151311, 117-151331, 117-151371, and 117-151371V001. Requirement: 1. Revise the KHI-BK117 Maintenance Manual to Revision No. 14 (or later approved revision) for Models KHI-BK117, BK117A-3, BK117A-4, BK117B-1, BK117B-2, and Revision No. 2 (or later approved revision) for Model KHI-BK117C-1.

2. Perform an inspection for bulging on the upper and lower surfaces of the main rotor blades in the area of the outboard lead balance weight in accordance with the KHI-BK117 Maintenance Manual, revised by Requirement 1. Inspect at the intervals specified in the KHI-BK117 Maintenance Manual, revised by Requirement 1.

If the inspection results exceed the allowable limit specified in the KHI-BK117 Maintenance Manual, before further flight, contact KHI Customer Service for technical advice.