Division Bell Helicopter Textron 412 Series Helic - AD/BELL 412/50 - Breeze-Eastern Rescue Hoist Assembly - Bell Helicopter Textron 412 Series Helicopters | Zoe

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Division Bell Helicopter Textron 412 Series Helic - AD/BELL 412/50 - Breeze-Eastern Rescue Hoist Assembly - Bell Helicopter Textron 412 Series Helicopters | Zoe

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/50	Breeze-Eastern Rescue Hoist Assembly	3/2006

Applicability:	All Model AB412 helicopters equipped with rescue hoist, part number BL-20200 series (Breeze-Eastern); without Breeze-Eastern Alert Service Bulletin (ASB) No. BL-12756-1-A25-01 Revision A incorporated.
Requirement:	Action in accordance with Agusta Mandatory Technical Bulletin No. 412-89 original issue, or later ENAC approved revision.Insert a copy of Agusta Mandatory Technical Bulletin No. 412-89 and a copy of this directive into the Aircraft Flight Manual. These may be removed when ASB No. BL‑12756-1-A25-01 has been complied with.Note: ENAC AD 2002-450 refers.
Compliance:	For Part I of the Requirement document:Before the next flight after 16 March 2006, unless already accomplished, and before each flight when use of the rescue hoist is anticipated; until accomplishment of ASB No. BL-12756-1-A25-01 Revision A.For Part II of the Requirement document:At each flight during operation of the rescue hoist; until accomplishment of ASB No. BL-12756-1-A25-01 Revision A.
	This Airworthiness Directive becomes effective on 16 March 2006.
Background:	A cable fracture occurred on a helicopter with a rescue hoist similar to the hoist installed on the Model AB412 helicopter. The cause of the cable fracture was found to be due to a malfunction of the slow-down feature, and to the crushable bumper that did not function correctly. The crushable bumper functions as a secondary sacrificial safety device should the slow-down feature fail in the up direction.

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David Villiers
Delegate of the Civil Aviation Safety Authority

2 February 2006