Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to certain Beech (Raytheon) Model BAe 125- 800A and Hawker 800 series airplanes, that would have required a detailed visual inspection of the fuel feed hose assemblies of the auxiliary power unit (APU) to detect overheating, degradation, proper routing, and adequate clearance; and the correction of any discrepancies found. That proposal was prompted by reports of heat damage to the fuel feed hose assembly of the APU due to contact between the hose assembly and hot surfaces. This action revises the proposed rule by adding a requirement to modify the fuel feed hose of the APU. The actions specified by this proposed AD are intended to prevent heat damage of the fuel feed hose, which could lead to a possible fire/smoke hazard when failure of the hose assembly occurs and consequent fuel mist or spray is emitted into the rear equipment bay.