Document ID: chunk:federal_register_of_legislation:F2006B07589:body:0
Version: federal_register_of_legislation:F2006B07589
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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/7 Oil Tank Drain Valve 7/90

 Applicability: Viper Mk 601-22 engines.

            Requirement: Inspect oil tank drain valve assembly for leakage in accordance with Rolls Royce Viper Mk 601-22 Service Bulletin No 79-A4.

            Note: CAA (UK ) Airworthiness Directive 015-04-90 refers.

 Compliance: Effective 12 July 1990:

(1)     Engines in service - Prior to 20 July 1990.

(2)     Prior to installation in an aircraft.

            Background:  Failure to detect oil leakage at the oil tank drain valve may result in total loss of oil pressure. Investigation of a total loss of oil pressure on a test flight following engine installation, revealed that the oil tank drain valve cap was not in position and the drain valve was stuck open allowing a rapid loss of oil tank contents.