Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Model Astra SPX and 1125 Westwind Astra series airplanes. This proposal would require detailed inspections and resistance measurements of the starter generator electrical cables of both engines to detect damage, and replacement of the electrical cable and cable support if any damage is found. This proposal would also require eventual replacement of the cable support. This action is necessary to prevent chafing of the starter generator cable, which could result in electrical arcing in the vicinity of a fuel line, and possible fire or explosion. This action is intended to address the identified unsafe condition.