AD/VIPER/3 - Blow Off Valve Operation Limit

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/3 Blow Off Valve Operation Limit 3/90

Viper Mk. 521, 522 engines.

1. Action in accordance with Rolls Royce Service Bulletin No. 75-A32, or

2. CAO 106 AD/RRT-V/13.

Effective 22 March 1990.

This Directive has been reissued to require a revised blow-off valve operating point to reduce the possibility of engine surge or stall.