Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
It has been found on in-service aircraft that some aileron tab bellcrank assemblies were not in accordance with the definition drawings.
The main item concerned is the retainer Part Number S2711004620000, which has been manufactured with a hole larger than it should be, or redrilled out of limits.
The function of the retainer is to maintain the spacer in position in case of rupture or loss of the bolt which links the tab control rod to the bellcrank assembly. If the diameter of the retainer hole is out of limit, the retainer function is lost and fail-safe installation is no longer ensured. This condition, if not corrected, could lead to loss of the aileron tab bellcrank functionality, resulting in diminished control of the aircraft. * * * * * * *
The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.