Beechcraft 99 Airliner — Flight Manual

This Service Bulletin, SB 27-3459, Rev. 1, issued by Beechcraft Corporation, addresses mandatory inspections and modifications related to flight control (gust) locks on various Beech aircraft, including the Beechcraft 99 Airliner. The bulletin emphasizes the importance of using approved flight control locks to prevent accidents caused by unauthorized or improperly installed gust locks. It outlines the compliance requirements for both civil and military aircraft and provides detailed instructions for inspecting and replacing gust locks. The bulletin also includes information on affected aircraft serial numbers and the necessary parts for compliance. This document is crucial for owners and operators to ensure safety and adherence to FAA regulations.

• Mandatory inspection and replacement of flight control (gust) locks for Beechcraft 99 Airliner, serials U-1 through U-239.
• Compliance required by the next Annual/Phase 1 Inspection after receipt of the bulletin.
• Unauthorized gust locks have caused numerous accidents; only approved locks should be used.
• Inspection of existing gust locks must confirm correct part numbers; replacements must be ordered if necessary.
• The bulletin includes specific part numbers for gust locks applicable to various Beech models.