Chemically Induced Fires in Aircraft Electrical Circuitry by Glycol/Water Solutions. Hazard Analysis and Elimination Methods.

摘要

As a result of airplane electrical connector fires traced to the presence of glycols, investigations have been undertaken to identify the mechanism of the involved hazards and to find methods of counteracting the hazards. Tests were performed with ethylene glycol, propylene glycol, and airplane deicing fluid as electrolytes in a wide range of dilution with water. Silver coated wire, gold coated connector pins, and rhodium coated connector pins were used as electrodes. Electrode spacings were determined which would produce the characteristic smoke and flames when 28 volts direct current was applied to the electrodes and the electrolyte was applied a drop at a time. The report details the tests performed, the variables conducive to a fire hazard and the procedures for reducing the hazard.