USA / as of April 26, 2010:

Your Blanik L-23 is grounded unless you have complied with FAA AD
2010-08-01, which refers to the work specified in LET/Aircraft
Industries Mandatory Bulletin MB L23/052a.

This bulletin describes the non-destructive testing for cracks in the
inner elevator hinge.

So far, 7 hinges were reportedly found cracked on L-23's.
The Soaring Safety Foundation would be very interested to hear of your
discovery of cracks, in order to possibly comment on any revised FAA
AD forthcoming on the time interval for further inspections of this
hinge.

Send your report to:

Any issues regarding the actual work to comply with this AD would also
be appreciated.