Commonwealth legislation

AD/AS 355/23 - Hydraulic System

In ForceCTH

Jurisdiction

Commonwealth

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legislative instrument

Plain English Summary

3/10 complexity

The directive mandates fitting a spring spacer in the hydraulic regulator/filter assembly of all Eurocopter AS 355 E/F/F1/F2 helicopters to prevent hydraulic overpressure if the regulator valve‑stem flange separates. Operators and spare-part suppliers must comply per Aerospatiale AS 355 Service Bulletin No. 29-01 within 300 flight hours after 30 Nov 1986 or by 31 Jan 1987, with parts and installation costs borne by operators and maintenance providers.

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AD/AS 355/23 - Hydraulic System

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Eurocopter AS 355 (Twin Ecureuil) Series Helicopters

AD/AS 355/23 Hydraulic System 12/86 DM

Applicability: All model AS 355 E, F, F1 and F2 helicopters.

Requirement: Action in accordance with Aerospatiale AS 355 Service Bulletin No. 29-01.

Note: French AD 86-150-30(B) refers.

Compliance: Within 300 hours time in service after 30 November 1986 or before 31 January 1987 whichever occurs first.

For spares: before installation in an aircraft after 30 November 1986.

Background: A spring spacer is fitted to prevent an overpressure in the hydraulic systems if the flange of the regulator valve stem, fitted to the filter unit, should come off.

Source text

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