64-15-06 SCHEIBE-FLUGZEUGBAU: Amdt. 755 Part 507 Federal Register June 26, 1964. Applies to All Model L-Spatz 55 Gliders Up to Serial Number 755.
Compliance required as indicated.
Because wood deterioration and corrosion have been found in the area of the outer aileron hinge bracket which has been attributed to trapped moisture in this location, accomplish the following:
(a) Within the next 25 hours' time in service after the effective date of this AD, inspect outer aileron hinge brackets and the surrounding area for corrosion, for rigid attachment to the wing spar and for deterioration of wood and glue. (Deteriorated wood is generally softer and discolored.)
(b) If any corrosion or deterioration is found or if hinge brackets are not rigidly attached to the wing spar, repair or replace as provided for in the manufacturer's Technical Information No. 1 dated January 21, 1964, or FAA approved equivalent, before further flight.
(c) Within 25 hours' time in service after the effective date of this AD, drill a 1/4 inch-diameter drain hole in each side of the aileron bracket attachment rib.
(Scheibe-Flugzeugbau GMBH Technical Information No. 1 dated January 21, 1964, covers this same subject.)
This directive effective July 27, 1964.