Commonwealth legislation

AD/BELL 412/53 - Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

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Commonwealth

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legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Agusta AB412 helicopters fitted with specific Bell tail‑rotor blade part numbers to carry out the corrective actions set out in Agusta Technical Bulletin 412‑88 Revision B (or a later ENAC‑approved revision). The work must be done within 100 flight hours after 20 December 2007 (unless already done under the earlier AD). The measure addresses missing forward tip weight retention blocks and aft tip closures that have caused damage and could lead to loss of a tail‑rotor blade.

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Current sections

Direct links to the current provisions in AD/BELL 412/53 - Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2.

Bell Helicopter Textron 412 Series Helic

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/53	Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2	13/2007

Applicability:	Agusta Model AB412 helicopters, equipped with tail rotor blades part number212-010-750-009, -011, -105, -107, and -113.
Requirement:	Action in accordance with Agusta Technical Bulletin 412-88 Revision B, or later ENAC approved revision.Note: ENAC AD 2005-139 refers.
Compliance:	Within 100 flight hours after 20 December 2007, unless already accomplished in accordance with AD/BELL 412/44 Amdt 1.
	This Airworthiness Directive becomes effective on 20 December 2007.
Background:	Reports were received of five occurrences of missing tail rotor blade forward tip weight retention blocks or aft tip closures that resulted in minor to substantial damage. Such damage could result in loss of a tail rotor blade, and subsequent loss of control of the helicopter.The requirements of this Directive were previously contained in AD/BELL 412/44 Amdt 1.

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David Villiers
Delegate of the Civil Aviation Safety Authority

7 November 2007

AD/BELL 412/53

Tail Rotor Blade Fwd Tip Weight Retentio

Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

13/2007

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 412/53	Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2	13/2007

Applicability:	Agusta Model AB412 helicopters, equipped with tail rotor blades part number212-010-750-009, -011, -105, -107, and -113.
Requirement:	Action in accordance with Agusta Technical Bulletin 412-88 Revision B, or later ENAC approved revision.Note: ENAC AD 2005-139 refers.
Compliance:	Within 100 flight hours after 20 December 2007, unless already accomplished in accordance with AD/BELL 412/44 Amdt 1.
	This Airworthiness Directive becomes effective on 20 December 2007.
Background:	Reports were received of five occurrences of missing tail rotor blade forward tip weight retention blocks or aft tip closures that resulted in minor to substantial damage. Such damage could result in loss of a tail rotor blade, and subsequent loss of control of the helicopter.The requirements of this Directive were previously contained in AD/BELL 412/44 Amdt 1.

David Villiers
Delegate of the Civil Aviation Safety Authority

7 November 2007

AD/BELL 412/53 - Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

Plain English Summary

Deep dive

Current sections

Bell Helicopter Textron 412 Series Helicopters

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/53

AD/BELL 412/53

Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

13/2007

13/2007

Source text

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

Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/53 AD/BELL 412/53

AD/BELL 412/53

Tail Rotor Blade Fwd Tip Weight Retentio Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

Tail Rotor Blade Fwd Tip Weight Retention Block and Aft Tip Closure - 2

13/2007 13/2007

13/2007