Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to Beech (Raytheon) Model Hawker 1000 and BAe 125-1000A series airplanes, that currently requires inspections to detect various discrepancies of the fuel hose assemblies on the auxiliary power unit (APU), and correction of any discrepancy found. That AD was prompted by several reports of heat damage to the fuel hose assembly on the APU. This action would add a requirement to replace the existing conduit of the fuel feed hose with new improved conduit, which would terminate the repetitive inspections. The actions specified by the proposed AD are intended to prevent failure of a fuel hose due to heat damage caused by incorrect routing or bleed air leakage; such failure could result in a malfunction of the APU, a fuel fire in the fuselage rear equipment bay, and reduced structural integrity of the surrounding structure.