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Thu, Apr 21, 2016

AD: Turbomeca S.A. Turboshaft Engines

AD NUMBER: 2016-08-16

PRODUCT: All Turbomeca S.A. Arriel 2E turboshaft engines.

ACTION: Final Rule

SUMMARY: This AD requires removing the pre-TU 193 adjusted high-pressure/low-pressure pump and metering valve assembly and replacing it with a part that is eligible for installation. This AD also requires replacing the constant delta-pressure (delta-P) diaphragm of the fuel metering valve.

This AD was prompted by reports of fuel flow non-conformities found during acceptance tests of Arriel 2E hydro-mechanical metering units (HMUs).

The FAA is issuing this AD to prevent failure of the delta-P diaphragm, which could result in an uncommanded in-flight shutdown and damage to the helicopter.

DATES: This AD becomes effective May 25, 2016.

FMI: AD

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