Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain Raytheon (Beech) Model 400, 400A, and 400T series airplanes. This proposed AD would require modifying the attachment fasteners on the engine cowling panels. This proposed AD results from several reports of loose attachment fasteners found on the engine cowling panels, and subsequently the panels either peeling back or separating from the airplane during flight. We are proposing this AD to prevent failure of the attachment fasteners on the engine cowling panels, which could result in separation of a panel from the airplane, and consequent damage to airplane structure. These conditions could adversely affect continued safe flight and landing of the airplane, or cause injury to people or damage to property on the ground.