77-11-03 BEECH: Amendment 39-2913. Applies to Model 278 propellers installed on Models H35, J35, K35, M35, N35, P35, A45 (T34A), B45 and D45 (T34B) airplanes.
Compliance: Required as indicated, unless previously accomplished.
To prevent loss of propeller control, accomplish the following:
A) Within 100 hours' time in service after the last inspection accomplished per AD 69-26-04, using dye penetrant procedures, inspect Beech P/N 278-336 pitch control bolts for evidence of cracks in the exposed thread runout area between the hex flats and the aft pitch setting nut. If a crack is detected, install Beech Kit No. 278- 0002S incorporating Beech P/N 278-368-1 or -3 pitch control bolts and steel pitch control yoke, in accordance with Beechcraft Service Instructions 0302-248, or later approved revisions.
B) Within 100 hours' time in service after the effective date of this AD, install Beech Kit No. 278- 0002S incorporating P/N 278-368-1 or -3 pitch control bolts and steel pitchcontrol yoke, in accordance with Beechcraft Service Instructions 0302-248, or later approved revisions.
C) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
This AD supersedes AD 69-26-04 (Amendments 39-897 and 39-967).
This amendment becomes effective July 16, 1977.