Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Beech (Raytheon) Model BAe 125-800A and -1000A, and Model Hawker 800 and 1000 series airplanes. This proposal would require modification of the TKS metering pump in the airframe ice protection system. This proposal is prompted by a report that the pump was found fitted with silver plated wiring. The actions specified by the proposed AD are intended to ensure that silver plated wiring is removed from these pumps; silver plated wiring carrying a direct current can ignite the ice protection fluid (glycol) when exposed to it, which could result in a possible fire hazard.