COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Allison Turbine Engines - 250 Series
AD/AL 250/14 Compressor Wheels, Glass Bead Peening 11/70
Applicability: All Compressor Assemblies with S/Nos. prior to CAC 21525B fitted to 250-C18 series engines and all Assemblies with S/Nos. prior to CAC 21773B fitted to 250- C18A engines.
Document: Allison 250 CEB 106.
Compliance: Before installation in an aircraft following next overhaul completed after 1 December 1970.