Summary
We are adopting a new airworthiness directive (AD) for all Turbomeca S.A. ARRIEL 2C, 2C1, 2C2, 2S1, and 2S2 turboshaft engines with modification TU34 or TU34A installed. This AD requires inspecting the torque conformation box (TCB) for correct resistance values and removing TCBs that fail inspection before further flight. This AD was prompted by TCB failures. We are issuing this AD to prevent failure of the TCB, loss of engine thrust control, and damage to the helicopter.
Directive Details
AD Number
FAA-2015-3805
Document Number
2016-02477
Type
Rule
Publication Date
February 9, 2016
Effective Date
March 15, 2016
Affected Manufacturer
Turbomeca S.A. Turboshaft
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2015-3805
Topics
Official Documents
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