Bell Helicopter Textron 412 Series Helic
Bell Helicopter Textron 412 Series Helicopters
Bell Helicopter Textron 412 Series Helicopters
| AD/BELL 412/50 | Breeze-Eastern Rescue Hoist Assembly | 3/2006 |
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| 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. |
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| 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