Summary
The FAA proposes to adopt a new airworthiness directive (AD) for Sicma Aero Seat third occupant seat assemblies, 133 Series. This proposed AD would require visually inspecting the installation of the two headrest bushings and installing Mecanindus pins to secure the bushings. This proposed AD results from Sicma's determination that missing or incorrectly secured bushings could loosen and cause disengagement of the headrest from the seat during a high-energy stop of the airplane, possibly injuring the seat occupant. We are proposing this AD to prevent disengagement of the headrest from the seat during a high-energy stop of the airplane that could injure the seat occupant.