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 250/69 Installation of Internal Energy Absorbing Ring 2/86
Applicability: 250-C28, -C28B and -C28C engines which do not incorporate internal energy absorbing ring P/N 23031865.
Requirement: Allison C.E.B.-A-72-2126.
Compliance: In accordance with the Requirement Document.
Background: This Directive is issued to ensure that debris from a no. 1 turbine wheel burst is contained thus precluding the possibility of secondary damage to the airframe.