airworthiness · Rule · Final rule. · Published 2016-02-09 · Effective 2016-03-15 · 81 FR 6753
Document
Document number
2016-02477
Federal Register citation
81 FR 6753
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Turbomeca S.A. Turboshaft
Publication date
2016-02-09
Effective date
2016-03-15
FAA docket
Docket No. FAA-2015-3805
Abstract
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.