Commonwealth legislation

AD/VIPER/6 - Blow-Off Valve Operating Limit

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This airworthiness directive (effective 19 April 1990) mandates owners/operators and maintenance organisations of Viper Mk 601-22 engines to comply with Rolls Royce SB Viper Mk 601-22 75‑All, which revises the blow-off valve operating point to reduce the risk of engine surge or stall. Compliance is compulsory; the operator bears costs and must rely on the manufacturer’s bulletin for the technical work and practical implementation.

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AD/VIPER/6 - Blow-Off Valve Operating Limit

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Rolls Royce Turbine Engines - Viper Series

AD/VIPER/6 Blow-Off Valve Operating Limit 4/90

Applicability: Viper Mk 601-22.

Requirement: Action in accordance with Rolls Royce SB Viper Mk 601-22 75-All. Compliance: Effective 19 April 1990.

Background: This Directive has been issued to require a revised blow-off valve operating point.

The Requirement reduces the possibility of engine surge or stall.

Source text

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