Commonwealth legislation

AD/BELL 412/47 - Hoist Cable Cut Electrical Circuit

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires Agusta‑Bell AB 412 helicopters fitted with a hoist to have the hoist cable‑cut panel wire harness modified per Agusta Alert Service Bulletin 412‑83 Revision A (29 Dec 2000) to prevent unintended firing of the cutting cartridge caused by chafed wiring. Operators must complete the modification within 30 days of the directive (effective 16 March 2006); helicopters already compliant with ENAC PA 2000‑574 are excluded. Operators pay for and schedule the technical work to meet the deadline.

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Direct links to the current provisions in AD/BELL 412/47 - Hoist Cable Cut Electrical Circuit.

Bell Helicopter Textron 412 Series Helic

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 dated29 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.

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James Coyne
Delegate of the Civil Aviation Safety Authority

1 February 2006

AD/BELL 412/47

Hoist Cable Cut Electrical Circuit

3/2006

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

Bell Helicopter Textron 412 Series Helic Bell Helicopter Textron 412 Series Helicopters

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 dated29 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.

AD/BELL 412/47 - Hoist Cable Cut Electrical Circuit

Plain English Summary

Deep dive

Current sections

Bell Helicopter Textron 412 Series Helicopters

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/47

AD/BELL 412/47

Hoist Cable Cut Electrical Circuit

Hoist Cable Cut Electrical Circuit

3/2006

3/2006

Source text

Bell Helicopter Textron 412 Series Helic Bell Helicopter Textron 412 Series Helicopters

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/47 AD/BELL 412/47

AD/BELL 412/47

Hoist Cable Cut Electrical Circuit Hoist Cable Cut Electrical Circuit

Hoist Cable Cut Electrical Circuit

3/2006 3/2006

3/2006