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AD/JBK 117/23 - Main Rotor Blades with Bolted Lead Inner Weights
Kawasaki BK 117 Series HelicoptersKawasaki BK 117 Series Helicopters
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Kawasaki BK 117 Series Helicopters
| AD/JBK 117/23 | Main Rotor Blades with BoltedLead Inner Weights | 7/2005 DM |
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| Applicability: | Model BK117, BK117 A-3, BK117 A-4, BK117 B-1, BK117 B-2, and BK117 C-1 helicopters. |
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| Requirement: | Action in accordance with Kawasaki Service Bulletins KSB-117-248 and KSB-117-248-1, or later JCAB approved revisions.Note: JCAB AD No. TCD-6590-2005 refers. |
| Compliance: | As specified in the Requirement documents. Unless it has already been accomplished, the 4 week period for the log check begins on 6 May 2005. |
| This Airworthiness Directive becomes effective on 6 May 2005. | |
| Background: | A report was received of the in-flight occurrence of severe vibrations on a BK117 helicopter. The pilot immediately performed a safe landing. The initial inspection revealed a cracked-open main rotor blade trailing edge. A subsequent inspection by the manufacturer revealed that a part of a bolted lead inner weight had come loose. This Directive introduces a life limit for blades with bolted lead inner weights installed. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
4 May 2005