Wed, Feb 01, 2012
AD NUMBER: 2012-02-12
PRODUCT: Certain Bombardier, Inc. Model
DHC-8-400, -401, and -402 airplanes
SUBJECT: Airworthiness Directive 2012-02-12
ACTION: Final rule; request for comments
SUMMARY: This AD requires an inspection of a
certain alternating current (AC) power wire bundle for damage, and
repair if necessary. Additionally, this AD requires segregating the
wire bundle into two wire bundles and installing Teflon tubing.
This AD was prompted by multiple reports of the loss of certain
AC systems caused by a burnt AC power wire bundle.
The FAA is issuing this AD to prevent the loss of ice protection
systems for the angle of attack vanes, pitot probes, engine inlets,
and windshields, and consequent loss of or misleading airspeed
indication and increased workload for the flight crew, which could
lead to loss of control of the airplane.
DATES: This AD becomes effective February 15, 2012.
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