Beechcraft Beechjet 400A — Service Bulletins

This document is a maintenance alert regarding the Omega PMA Bolt failures on Beech Jet 400 aircraft, specifically highlighting issues that have been observed with the Beech Jet 400A model. It outlines several incidents of bolt failures that have led to significant safety concerns, including tire deflation and wheel separation during operation. The document emphasizes the importance of removing the affected Omega PMA bolts from service to ensure the safety of the aircraft. It provides detailed accounts of incidents, inspections, and findings from FAA inspectors, as well as a mandatory service bulletin issued by Omega to inform operators of the potential risks associated with these bolts. This alert is crucial for maintenance personnel and operators of the Beech Jet 400 series to prevent further incidents.

• Several incidents of Omega PMA bolt failures have occurred on Beech Jet 400A, leading to safety concerns.
• In May 2018, a wheel separation incident resulted from the failure of all seven main wheel bolts.
• FAA inspections revealed cracks and sheared heads on the Omega PMA bolts, indicating manufacturing defects.
• Operators are advised to refer to Mandatory Service Bulletin OAA-MSB-2018-001 for further instructions.
• Affected Omega bolts should be identified by their head marking and removed from service immediately.