Blanik L-13 AD for Repetitive Inspection. AD effective JAN 2008.

(FAA) . . . issued a notice of proposed rulemaking (NPRM) to amend
14 CFR
part 39 to include an AD that would apply to the specified products.
That NPRM was published in the Federal Register on October 4, 2007
(72
FR 56700). That NPRM proposed to correct an unsafe condition for the
specified products. The MCAI states:

This Airworthiness Directive (AD) is prompted by the discovery
of cracks on L13 BLANIK sailplanes in zones where the forward and
aft control sticks are attached to the connecting rod, designated as
``control bridge'' in the relevant Illustrated Parts Catalogues
(IPC). If left uncorrected, cracks could propagate and lead to
failure of the connecting rod with subsequent loss of control of the
sailplane.

For the reasons described above, this AD requires an inspection
of the control bridge to detect cracks and replacement, if
necessary. In addition, this AD requires an update of the aircraft
Maintenance Manual (MM) to incorporate repetitive inspections of the
control bridge.