AD/VIPER/4 - Blow-Off Valve

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2006B07586 Not in force Legislative Instrument

Legislation content

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

 


Rolls Royce Turbine Engines - Viper Series

 

AD/VIPER/4 Blow-Off Valve 3/90

Applicability: Viper Mk. 521, 522 engines.

 

Requirement: 1. Action in accordance with Rolls Royce Service Bulletin No. 75-31, or

 

2. CAO 106 AD/RRT-V/14. Compliance: Effective 22 March 1990.

Background: This Directive has been reissued to require repetitive inspection of the blow-off valve.

Engine surge/stall events have been attributed, in part, to stiction of the blow-off valve.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.