Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Learjet Model 60 series airplanes. This proposal would require inspecting the routing of oxygen tubing to ensure that there is adequate clamping of the tubing and adequate clearance between the tubing and electrical wiring or electrical contacts, and taking corrective action, if necessary. The actions specified by the proposed AD are intended to prevent electrical arcing between the oxygen tubing and an electrical source which could result in an oxygen fire.