Document ID: chunk:federal_register_of_legislation:F2009L03202:body:0:p1
Version: federal_register_of_legislation:F2009L03202
Segment Type: other
Provision Reference: 
Character Range: 0–2797

AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/ARRIEL/32 Amdt 1 and issues the following AD under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Turbomeca Turbine Engines - Arriel Series
AD/ARRIEL/32 Amdt 2  Engine - Module M04 Power Turbine Blades  10/2009 TX

Applicability:  Turboméca S.A. Arriel 1B, 1D and 1D1 turboshaft engines, fitted with Modules M04 (Power Turbine) as identified in figure 1 of Turboméca Mandatory Service Bulletin (MSB) A292 72 0827 version C, and Arriel 2B, 2B1 and 2B1A turboshaft engines, fitted with Modules M04 as identified in figure 1 of Turboméca MSB A292 72 2833 version C.

                Note 1:  Arriel 1B, 1D and 1D1 turboshaft engines are known to be installed on, but not limited to, Eurocopter AS 350 B, AS 350 BA, AS 350 BB, AS 350 B1 and AS 350 B2 helicopters; Arriel 2B, 2B1 and 2B1A turboshaft engines are known to be installed on, but not limited to, Eurocopter AS 350 B3, EC 130 B4 and Changhe Z11 helicopters.

                Note 2:  The variants above are installed on single-engine helicopters.
Requirement:       1. For engines with a Module M04 (PT module) which has accumulated 5,000 Total Power Turbine (PT) Cycles or more at the effective date of this AD:

                   Replace the module M04, or PT wheel assembly, or PT blades, as instructed in paragraph 2.B.(1)(b) of Turboméca MSB A292 72 0827 version C for Arriel 1 engines and A292 72 2833 version C for Arriel 2 engines.

                   2. For engines with a Module M04 which has accumulated less than 5,000 Total PT Cycles at the effective date of this AD:

                     a. Update the module M04 log card and the engine log book to enter the 5,000 PT Cycle life-limit of the PT blades as instructed in paragraph 2.B.(1)(a) of Turboméca MSB A292 72 0827 version C for Arriel 1 engines and
                     A292 72 2833 version C for Arriel 2 engines.

                     b. Replace the module M04, or PT wheel assembly, or PT blades as instructed in paragraph 2.B.(1)(b) of Turboméca MSB A292 72 0827 version C for Arriel 1 engines and A292 72 2833 version C for Arriel 2 engines.

                The use of later approved revisions of these