Airworthiness Directive: 131
Date: October 21, 2004 Subject: Tail Boom Compliance: Mandatory Models Effected: All S-12 Airailes with Serial
Numbers Before 01950000 Summary: Inspection of the tail boom on all
Airaile models should be conducted at the earliest possible date
and prior to the next flight. The inspection is to determine:
Installation of the tail boom doubler sleeve. Inspect the inside of
the boom to visually confirm the presence of a boom doubler sleeve.
If there is not a boom doubler sleeve present, the aircraft is to
be grounded and the boom replaced with a tail boom with the doubler
sleeve. Flight is not recommended for any version of the Airaile
aircraft not equipped with a boom doubler sleeve. The boom doubler
sleeve can be viewed from the tail end of the boom using a powerful
flashlight. See drawing below for location.
Visually inspect the presence and integrity of the plastic strip
installed between the collar and tail boom. Take proper corrective
action to replace or reposition protective plastic strip. If no
corrosion is present around the collar, remove boom for inspection
under the surface of the collar. No corrosion should be present.
Replace boom if corrosion is present.
General inspection of tail boom at all points of attachment and
total surface area for: the presence of corrosion inside and out,
cracks, nicks, dents, holes, or any deformation. Replace boom as
required.
This inspection procedure is required at each annual condition
inspection.
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