Summary
This document proposes to supersede Airworthiness Directive (AD) 95-02-18, which currently requires repetitive inspections of the engine truss assemblies for cracks on certain Raytheon Aircraft Company (Raytheon) Beech Models 1900, 1900C (C-12J), and 1900D airplanes, repair or replacement of any cracked engine truss assembly, and installation of reinforcement doublers. This proposed AD is the result of continued reports of fatigue cracks found on engine trusses on airplanes in compliance with AD 95-02-18. The proposed AD would require engine truss assembly replacement, periodic inspections and replacements, and the eventual incorporation of a cowling support installation kit as terminating action. The repetitive inspections of AD 95-02-18 would be retained until mandatory engine truss assembly replacement. The actions specified by the proposed AD are intended to detect and correct cracked engine truss assemblies, which could result in failure of the engine truss assembly and consequent loss of airplane control.