Abstract: A method of assessing potential conditions affecting aircraft electrical wiring systems. Electrical wiring system components potentially affected by a potential failure condition of the aircraft are identified. Probabilistic and/or statistical methods are used to determine exposure of one or more wire segments of the identified component(s) to hazard and whether the exposure meets a predetermined safety threshold. Effects of potential failure modes of the identified segment(s) on a system safety assessment for the electrical wiring systems are evaluated. This method can be used to facilitate compliance with aircraft safety regulations.

Abstract: A method of assessing potential conditions affecting aircraft electrical wiring systems. Electrical wiring system components potentially affected by a potential failure condition of the aircraft are identified. Probabilistic and/or statistical methods are used to determine exposure of one or more wire segments of the identified component(s) to hazard and whether the exposure meets a predetermined safety threshold. Effects of potential failure modes of the identified segment(s) on a system safety assessment for the electrical wiring systems are evaluated. This method can be used to facilitate compliance with aircraft safety regulations.

Abstract: In a high intensity metal halide discharge lamp utilizing thorium in conjunction with a transport cycle for electrode activation, a getter, preferably cadmium or zinc is added to the lamp fill for the purpose of reducing the concentration of free iodine during operation. By so doing, deposition of thorium on the electrode tip during operation is assured and performance and maintenance are improved. The quantity of getter may include a portion supplied as a corrective measure to scavenge excess iodine released during manufacture, and another portion providing a long-term buffering capacity for capturing iodine released during the lamp's life by reaction of the dose, particularly ScI.sub.3 and ThI.sub.4, with the SiO.sub.2 of the lamp envelope.

Abstract: Miniature metal vapor arc lamps containing mercury and one or more metal halides are subject to severe blackening of the arc tube and poor lumen maintenance unless a high pressure of starting gas is used. A Penning mixture of neon admixed with 0.01 to 10% argon, krypton or xenon at a fill pressure from about 100 to 200 torr provides lower starting voltage together with better lumen maintenance than can be achieved with the conventional argon starting gas.