Commonwealth legislation

AD/ARRIEL/5 - Gas Generator Rear Bearing Oil Pipe

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legislative instrument

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This Directive, issued by the Civil Aviation Safety Authority, mandates Turbomeca modification TU 144 (per Service No. 72‑292‑0088) to the gas‑generator rear bearing oil pipe on Arriel 1-series engines to prevent oil‑pipe rupture and a possible inflight oil fire. It must be done before engine installation (or by 30 Nov 1986 for engines already in service) and references Bureau Veritas Directive 86‑147(B); responsibility falls to engine installers/maintainers.

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AD/ARRIEL/5 - Gas Generator Rear Bearing Oil Pipe

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Turbomeca Turbine Engines - Arriel Series

AD/ARRIEL/5 Gas Generator Rear Bearing Oil Pipe 12/86

Applicability: Arriel 1A, 1A1, 1A2, 1B, 1C, 1C1, 1M engines.

Requirement: Incorporate Turbomeca modification TU 144 in accordance with Turbomeca Service No. 72-292-0088.

Reference Document : Bureau Veritas Directive 86-147(B).

Compliance: 1. Before installation in an aircraft.

Not later than 30 November 1986.

Background: This Directive has been issued to reflect the requirements of Bureau Veritas Directive No. 86-147(B). The Directive requires the gas generator rear bearing oil pipe to be modified to prevent a failure which could result in an oil fire. Aerospatiale has recently advised of an inflight oil fire in an SA 365 Dauphin which resulted from rupture of the gas generator oil pressure pipe.

Source text

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

1 AD/ARRIEL/5 - Gas Generator Rear Bearing Oil Pipe