Airworthiness Directive · Amendment 39-14236 · Turbomeca Arrius 2F Turboshaft Engines
Turbomeca Arrius 2F Turboshaft Engines
This AD applies to Turbomeca S.A. Arrius 2F turboshaft engines. These engines are installed on, but not limited to, Eurocopter EC120 helicopters.
The FAA is adopting a new airworthiness directive (AD) for Turbomeca Arrius 2F turboshaft engines. This AD requires a one-time removal and inspection of the fuel filter-holder assembly to determine that the fuel control unit (FCU) filter is dimensionally correct. The AD also requires updating the Engine Maintenance Manuals to include a dimensional check of the fuel filter-holder assembly every time the FCU filter element is removed from the fuel filter-holder assembly. This AD results from reports of restricted fuel flow caused by a dimensionally incorrect FCU filter. Ground run testing may not detect the fuel flow limitation. We are issuing this AD to detect a dimensionally incorrect FCU filter that could lead to an undetected limitation of fuel flow, limiting the maximum power available in-flight, which could result in the inability to continue safe flight, avoid obstacles or land safely.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
Within 25 engine-operating-hours after the effective date of this AD, remove the fuel filter-holder assembly and check that the FCU fuel filter is in the correct position using Paragraph 2 of Turbomeca Mandatory Alert Service Bulletin No. A319 73 4823, dated May 11, 2005.
(g) Within 30 days, revise your engine maintenance manual to include a dimensional check to ensure the correct position of the FCU filter after every installation of the fuel filter element into the fuel filter-holder assembly. The latest revision of the Arrius 2F maintenance manual includes the dimensional check in Sub-Task 73-23-06-901-002 paragraph (2)(e).
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Engines
