Summary
We propose to adopt a new airworthiness directive (AD) for certain Raytheon Aircraft Company Model 390 airplanes. This proposed AD would require you to inspect the spigot bearing, part number (P/N) MS14104-16, for the proper position in the spigot fitting assembly and to install the wing spigot bearing retainer kit, P/N 390-4304-0001. This proposed AD results from two reports of the spigot bearing not being positioned flush with the fitting assembly, but protruding outside of the fitting assembly. We are proposing this AD to detect spigot bearings that are not positioned flush with the fitting assembly. This condition could result in the spigot bearing becoming disengaged from the fitting assembly, which could cause motion between the wing and the fuselage and degrade the structural integrity of the wing attachment to the fuselage. This could lead to wing separation and loss of control of the airplane.