76-10-09 BEECH: Amendment 39-2616. Applies to Models B19 (Serial Numbers MB-732 through MB-788), C23 (Serial Numbers M-1600 thru M-1769) and B24R (Serial Numbers MC-305 thru MC-398) airplanes equipped with mechanical flaps.
Compliance: Required as indicated, unless already accomplished.
To prevent unscheduled retraction of wing flaps, within the next 50 hours' time in service after the effective date of this AD, accomplish the following:
A. Pursuant to the procedures and instructions outlined in Beechcraft Service Instructions No. 0831-161 or later approved revisions:
(1) Using a flashlight and mirror, visually inspect the inside of the flap torque tube to determine if Beech P/N 169-524024-9 flap cable block is attached to the torque tube with rivets or with screws and nuts.
(2) If the flap cable block is attached to the torque tube with the screws and nuts identified in Paragraph (3) below, no further action is required.
(3) If a flap cable blockis attached to the torque tube with rivets, drill out the three rivets (one at a time in accordance with the aforementioned service instructions) and replace with three each MS24694S58 screws, AN960-10 washers and MS21042L3 locknuts or Beech P/N 130909N29 locknuts.
B. Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.
This amendment becomes effective May 28, 1976.