MANUFACTURER: BAE Systems (Operations) Limited
(Jetstream) Model 4101 Airplanes SUBJECT: Airworthiness Directive AD
2009-10-02
SUMMARY: The FAA is
superseding an existing airworthiness directive (AD), which applies
to all BAE Systems (Operations) Limited (Jetstream) Model 4101
airplanes. That AD currently requires operators to determine the
number of flight cycles accumulated on each component of the main
landing gear (MLG) and the nose landing gear (NLG), and to replace
each component that reaches its life limit with a serviceable
component. The existing AD also requires operators to revise the
Airworthiness Limitations (AWL) section of the Instructions for
Continued Airworthiness (ICA) in the aircraft maintenance manual to
reflect the new life limits for structurally significant items.
This new AD requires a new revision of the AWL section of the ICA
to incorporate revised life limits for structurally significant
items, operational and functional tests of certain systems, and
instructions to retain critical ignition source prevention features
during configuration changes. This AD results from mandatory
continuing airworthiness information (MCAI) originated by an
aviation authority of another country. We are issuing this AD to
prevent failure of certain structurally significant items,
including the MLG and the NLG, which could result in reduced
structural integrity of the airplane; and to prevent fuel vapor
ignition sources, which could result in fuel tank explosion and
consequent loss of the airplane.
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