Commonwealth legislation

AD/DHC-8/127 - Airworthiness Limitation Items

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legislative instrument

Plain English Summary

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This AD requires operators of Bombardier DHC‑8 models 400–402 (serials 4001, 4003–4094) to comply with Transport Canada AD CF‑2004‑19, with a revised effective date of 31 August 2006. Mechanically, it incorporates airworthiness limitation items and mandated inspection/maintenance requirements into affected aircraft programs. Transport Canada found fatigue failures in the engine isolator bracket and in several main landing‑gear shock‑strut parts; those parts are identified as principal structural elements requiring specific actions (Requirement; Background).

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Direct links to the current provisions in AD/DHC-8/127 - Airworthiness Limitation Items.

Bombardier (Boeing Canada/De Havilland)

Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/127	Airworthiness Limitation Items	9/2006

Applicability:	DHC-8 aircraft, Models 400, 401, and 402, with serial numbers 4001, and 4003 through 4094.
Requirement:	Action in accordance with the requirements of Transport Canada AD CF-2004-19.
Compliance:	As specified in the Requirement document, with a revised effective date of31 August 2006.
	This Airworthiness Directive becomes effective on 31 August 2006.
Background:	During DHC-8-400 type certification fatigue testing, fatigue failures were discovered at the engine isolator bracket and at the orifice support tube, upper bearing and piston plug in the main landing gear shock strut assembly. Failure of these components, which have been identified as principal structural elements, could adversely affect the structural integrity of the engine installation and of the main landing gear.

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David Villiers
Delegate of the Civil Aviation Safety Authority

19 July 2006

AD/DHC-8/127

Airworthiness Limitation Items

9/2006

Source text

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

Bombardier (Boeing Canada/De Havilland) Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/127	Airworthiness Limitation Items	9/2006

Applicability:	DHC-8 aircraft, Models 400, 401, and 402, with serial numbers 4001, and 4003 through 4094.
Requirement:	Action in accordance with the requirements of Transport Canada AD CF-2004-19.
Compliance:	As specified in the Requirement document, with a revised effective date of31 August 2006.
	This Airworthiness Directive becomes effective on 31 August 2006.
Background:	During DHC-8-400 type certification fatigue testing, fatigue failures were discovered at the engine isolator bracket and at the orifice support tube, upper bearing and piston plug in the main landing gear shock strut assembly. Failure of these components, which have been identified as principal structural elements, could adversely affect the structural integrity of the engine installation and of the main landing gear.

AD/DHC-8/127 - Airworthiness Limitation Items

Plain English Summary

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Current sections

Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/127

AD/DHC-8/127

Airworthiness Limitation Items

Airworthiness Limitation Items

9/2006

9/2006

Source text

Bombardier (Boeing Canada/De Havilland) Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes

AD/DHC-8/127 AD/DHC-8/127

AD/DHC-8/127

Airworthiness Limitation Items Airworthiness Limitation Items

Airworthiness Limitation Items

9/2006 9/2006

9/2006