Document ID: chunk:federal_register_of_legislation:F2006L00368:body:0
Version: federal_register_of_legislation:F2006L00368
Segment Type: other
Provision Reference: 
Character Range: 0–1813

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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.

Bell Helicopter Textron 412 Series Helicopters
AD/BELL 412/47  Hoist Cable Cut Electrical Circuit  3/2006

Applicability:  Agusta-Bell AB 412 helicopters equipped with a hoist.
                Note 1:  Helicopters that have had ENAC Prescrizione di Aeronavigabilita' (PA) (Airworthiness Directive) 2000-574 accomplished are not affected by this Directive.
Requirement:    If not previously accomplished, modify the cable cut panel wire harness installation in accordance with Agusta Alert Service Bulletin 412-83 Revision A dated
                29 December 2000.
                Note 2:  ENAC (Italy) AD 2001-001 refers.
Compliance:     Within 30 days after the effective date of this Directive.
                This Airworthiness Directive becomes effective on 16 March 2006.
Background:     An operator of an AB 412 experienced the loss of a hoist hook during flight due to the firing of the cartridge even though the hoist was not operating.  Inspection of the electrical installation revealed chafing of electrical wiring in the cartridge firing circuit.

James Coyne
Delegate of the Civil Aviation Safety Authority

1 February 2006