2013-18-03
FR doc 2013-21578 · 78 FR 54751AD 2013-18-03Published 2013-09-06Effective 2013-10-11
Requires replacing certain part-numbered engine auto-relight kit control boxes.
Full official abstract
We are adopting a new airworthiness directive (AD) for certain Bell Helicopter Textron Canada Inc. (BHT) Model 206A, 206B, and 206L helicopters. This AD requires replacing certain part-numbered engine auto-relight kit control boxes. This AD was prompted by a design review that revealed the control box chipset did not meet the required temperature range requirements, which could cause the control box to malfunction, disabling the engine auto-relight system. The actions of this AD are intended to prevent a disabled auto-relight system, failure of the engine to relight after a flame-out, increased pilot workload during a power loss emergency, and subsequent loss of control of the helicopter.
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