Commonwealth legislation

AD/DO 328/59 - Hydraulic Pressure Dump and Relief Valve

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This directive requires operators of Dornier 328‑100 aeroplanes (serial numbers 3005–3095) to replace hydraulic pressure dump and relief valve P/N ZHV29‑1 with P/N ZHV29‑2 within 30 days (Requirement; Compliance). The regulator records that a thin housing section and possible over‑torquing could cause hydraulic leakage and loss of hydraulic system function (Background); the compliance cost and fitting fall to aircraft owners/operators and their maintenance organisations and rely on availability of the replacement valve and Dornier Service Bulletin No. 328‑29‑205.

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Direct links to the current provisions in AD/DO 328/59 - Hydraulic Pressure Dump and Relief Valve.

Dornier 328 Series Aeroplanes

AD/DO 328/59	Hydraulic Pressure Dump and Relief Valve	6/2006

Applicability:	Dornier 328-100 aeroplanes Serial Numbers 3005 through 3095 inclusive.
Requirement:	Unless previously accomplished replace the pressure dump and relief valve Part Number (P/N) ZHV29-1 with valve P/N ZHV29-2.Note 1: LBA AD 97-072 dated 27 March 1997refers.Note 2: Dornier 328 Service Bulletin No. 328-29-205 pertains to this subject.
Compliance:	Within 30 days after the effective date of this AD.
	This Airworthiness Directive becomes effective on 8 June 2006.
Background:	The pressure dump and relief valve may have a thin section in the housing and may have been overtorqued during manufacture. This may lead to hydraulic leakage from the valve and loss of the hydraulic system from the aeroplane.

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James Coyne
Delegate of the Civil Aviation Safety Authority

28 April 2006

AD/DO 328/59

Hydraulic Pressure Dump and Relief Valve

6/2006

Source text

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

Dornier 328 Series Aeroplanes Dornier 328 Series Aeroplanes

Dornier 328 Series Aeroplanes

AD/DO 328/59	Hydraulic Pressure Dump and Relief Valve	6/2006

Applicability:	Dornier 328-100 aeroplanes Serial Numbers 3005 through 3095 inclusive.
Requirement:	Unless previously accomplished replace the pressure dump and relief valve Part Number (P/N) ZHV29-1 with valve P/N ZHV29-2.Note 1: LBA AD 97-072 dated 27 March 1997refers.Note 2: Dornier 328 Service Bulletin No. 328-29-205 pertains to this subject.
Compliance:	Within 30 days after the effective date of this AD.
	This Airworthiness Directive becomes effective on 8 June 2006.
Background:	The pressure dump and relief valve may have a thin section in the housing and may have been overtorqued during manufacture. This may lead to hydraulic leakage from the valve and loss of the hydraulic system from the aeroplane.

James Coyne
Delegate of the Civil Aviation Safety Authority

28 April 2006

AD/DO 328/59 - Hydraulic Pressure Dump and Relief Valve

Plain English Summary

Deep dive

Current sections

Dornier 328 Series Aeroplanes

Dornier 328 Series Aeroplanes

AD/DO 328/59

AD/DO 328/59

Hydraulic Pressure Dump and Relief Valve

Hydraulic Pressure Dump and Relief Valve

6/2006

6/2006

Source text

Dornier 328 Series Aeroplanes Dornier 328 Series Aeroplanes

Dornier 328 Series Aeroplanes

AD/DO 328/59 AD/DO 328/59

AD/DO 328/59

Hydraulic Pressure Dump and Relief Valve Hydraulic Pressure Dump and Relief Valve

Hydraulic Pressure Dump and Relief Valve

6/2006 6/2006

6/2006