AD NUMBER: 2004-05-12R1
MANUFACTURER: Bombardier SUBJECT: Airworthiness Directive 2004-05-12
R1 SUMMARY: The FAA is revising an existing
airworthiness directive (AD) for certain Bombardier Model
CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. That AD
currently requires repetitive inspections of the left and right
engine throttle control gearboxes for wear, and corrective action
if necessary. This AD limits the applicability of the existing AD,
extends the compliance time for the initial inspection, and
clarifies the reporting requirement. This AD is prompted by
numerous failures of the engine throttle control gearbox, some of
which resulted in an in-flight engine shutdown. We are issuing this
AD to prevent excessive wear of the gearboxes and subsequent
movement or jamming of the engine throttle; movement of the
throttle towards the idle position brings it close to the fuel
shut-off position, which could result in an in-flight engine
shutdown.The FAA is revising an existing airworthiness directive
(AD) for certain Bombardier Model CL-600-2B19 (Regional Jet Series
100 & 440) airplanes. That AD currently requires repetitive
inspections of the left and right engine throttle control gearboxes
for wear, and corrective action if necessary. This AD limits the
applicability of the existing AD, extends the compliance time for
theinitial inspection, and clarifies the reporting requirement.
This AD is prompted by numerous failures of the engine throttle
control gearbox, some of which resulted in an in-flight
engineshutdown. We are issuing this AD to prevent excessive wear of
the gearboxes and subsequent movement or jamming of the engine
throttle; movement of the throttle towards the idle position brings
it close to the fuel shut-off position, which could result in an
in-flight engine shutdown.
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