Commonwealth legislation

AD/ECUREUIL/106 - Tail Rotor Blade Trailing Edge Tab

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive orders operators of Eurocopter AS350 (B, BA, BB, B1, B2, B3 and D) helicopters with specified tail‑rotor blades (PN 355A 12.0040 or 355A 12.0050.04, SNs 8400–9224, before incorporation of Repair Sheet FR No.238 or Work Card 64.10.00.872) to install additional rivets on the trailing‑edge tab according to the manufacturer’s alert service bulletin. It must be done within 100 flight hours or three months of 20 January 2005 because of reported tab debonding that can raise vibration and risk tab loss.

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AIRWORTHINESS DIRECTIVE

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For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (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.

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Eurocopter AS 350 (Ecureuil) Series Helicopters

AD/ECUREUIL/106 Tail Rotor Blade Trailin

AD/ECUREUIL/106 Tail Rotor Blade Trailing Edge Tab 1/2005

Applicability: AS 350 helicopters, versions B, BA, BB, B1, B2, B3, and D, fitted with tail rotor blades part number 355A 12.0040 all dash numbers, and part number 355A 12.0050.04, with serial numbers from 8400 through 9224, before incorporation of Repair Sheet FR No. 238 or incorporation of Work Card 64.10.00.872 (Refer to equipment log card (FME)).

Note: Eurocopter AS 350 Alert Service Bulletin No. 64.00.05 corresponds to Repair Sheet FR No. 238.

Requirement: Install additional rivets on the trailing edge tab of blades in accordance with paragraph 2.B. of Eurocopter Alert Service Bulletin No.64.00.05 or later EASA approved revision.

Note: DGAC AD F-2004-178 refers.

Compliance: Within 100 flight hours or 3 months after 20 January 2005, whichever occurs first.

This Airworthiness Directive becomes effective on 20 January 2005.

Background: Reports were received of significant tail rotor blade trailing edge tab debonding.

Reduced security of the trailing edge tab due to debonding could lead to loss of the tab if it is not monitored, and result in a significant increase in the vibration level.

Signature of David Villiers, Delegate of the Civil Aviation Safety Authority.

David Villiers

Delegate of the Civil Aviation Safety Authority 3 December 2004

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Source text

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

AIRWORTHINESS DIRECTIVE AIRWORTHINESS DIRECTIVE

AIRWORTHINESS DIRECTIVE

Eurocopter AS 350 (Ecureuil) Series Helicopters

AD/ECUREUIL/106 Tail Rotor Blade Trailin AD/ECUREUIL/106 Tail Rotor Blade Trailing Edge Tab 1/2005

AD/ECUREUIL/106 Tail Rotor Blade Trailing Edge Tab 1/2005

Note: Eurocopter AS 350 Alert Service Bulletin No. 64.00.05 corresponds to Repair Sheet FR No. 238.

Requirement: Install additional rivets on the trailing edge tab of blades in accordance with paragraph 2.B. of Eurocopter Alert Service Bulletin No.64.00.05 or later EASA approved revision.

Note: DGAC AD F-2004-178 refers.

Compliance: Within 100 flight hours or 3 months after 20 January 2005, whichever occurs first.

This Airworthiness Directive becomes effective on 20 January 2005.

Background: Reports were received of significant tail rotor blade trailing edge tab debonding.

Reduced security of the trailing edge tab due to debonding could lead to loss of the tab if it is not monitored, and result in a significant increase in the vibration level.

David Villiers

Delegate of the Civil Aviation Safety Authority 3 December 2004