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

Viper Mk 601-22.

Action in accordance with Rolls Royce SB Viper Mk 601-22 75-All.

Effective 19 April 1990.

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

The Requirement reduces the possibility of engine surge or stall.