AD NUMBER: 2003-11-12
MANUFACTURER: Moravan
SUBJECT: Airworthiness Directive 2003-11-12 SUMMARY: This document supersedes Airworthiness
Directive (AD) 2003-03-13, which currently establishes a technical
service life for MORAVAN a.s. (Moravan) Model
Z-242L airplanes by restricting Acrobatic and
Utility category operations and requiring replacement of the wings
after a certain operational time. AD 2003-03-13 resulted from
mandatory continuing airworthiness information(MCAI) issued by the
airworthiness authority for the Czech Republic. The restrictions
required by AD 2003-03-13 only take account for the aerobatic load
spectrum and do not account for the aerobatic frequency. The
restrictions also address the life limit of the wings when they
should address the life limit of the entire airframe (life limit of
the airplane). Although the aerobatic frequency will extend the
operational times, it more importantly will ensure that all
airplanes (even those that have not reached the operational limits)
are not subject to fatigue cracking caused by exceeding the
aerobatic frequency. This AD will maintain the restrictions of AD
2003-03-13, but will incorporate the aerobatic frequency and life
limit the airplane instead of just the wings. The actions specified
by this AD are intended to prevent structural failure of the wing
due to fatigue cracking. Such failure could result in a wing
separating from the airplane with consequent loss of airplane
control.
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