AD/ARRIEL/3 Amdt 2 - Free Turbine Containment Shield (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Turbomeca Turbine Engines - Arriel Series

AD/ARRIEL/3 Amdt 2

Free Turbine Containment Shield 7/95

Applicability: Arriel 1A, 1A1, 1B, 1D, 1D1 engines.

Requirement: Install a free turbine containment shield in accordance with the following requirements:

1. Arriel 1A and 1A1 engines incorporating modification TU 13 but not incorporating modifications TU 99 and TU 215, action in accordance with Turbomeca Service Bulletins 292-72-0206 (TU 254) and 292-72-0208 (TU 259).

2. Arriel 1B and 1D engines not incorporating modifications TU 99 and TU 215, action in accordance with Turbomeca Service Bulletins 292-72-0206 (TU 254) and 292-72-0208 (TU 259).

3. Arriel 1A and 1A1 engines incorporating modifications TU 13 and TU 99, action in accordance with Turbomeca Service Bulletins 292-72-0207 (TU 255) and 292- 72-0208 (TU 259).

4. Arriel 1B, 1D and 1D1 engines incorporating modification TU 99, action in accordance with Turbomeca Service Bulletins 292-72-0207 (TU 255) and 292-72- 0208 (TU 259).

Note: DGAC Airworthiness Directive 95-069(B) refers.

Compliance: Effective 22 June 1995; at next disassembly of the free turbine module assembly.

Background: This Directive has been issued to require the installation of a containment shield to the free turbine module. The requirement is to prevent the release of turbine components in the event of an overspeed failure of the free turbine. This amendment reflects the requirements of DGAC Airworthiness Directive 95-069(B).