Thu, Aug 30, 2007
AD NUMBER: 2007-17-17
SUBJECT: Airworthiness Directive 2007-17-17
SUMMARY: The FAA is
adopting a new airworthiness directive (AD) for certain Learjet
Model 31, 31A, 35, 35A (C-21A), 36, 36A, 55, 55B, and 55C
airplanes, and Model 45 airplanes.
This AD requires inspecting for unsealed gaps on the pylon side
of the engine firewall and cleaning/sealing any unsealed gap; and,
for certain airplanes, inspecting for unsealed gaps of the pylon
trailing edge and cleaning/sealing any gap.
This AD results from a report that unsealed gaps (penetration
points) of the engine firewall were discovered during
We are issuing this AD to prevent penetration of flammable
liquids or fire through the engine firewall into the engine pylon,
which could lead to fire inside the airplane.
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