Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/95

Rh as raceways G and H respectively. Each raceway comprised several channels and each channel in turn comprised several groups of wire bundles relating to the various systems. Examples of these systems are the CVR, DFDR, automatic pllots, yaw damper, stabiliser electric trim, empennage control surface position indicators, lights and interphone system.

Circuit-breakers installed at various locations, many of which are in the cockpit, provide protection for all wiring by opening in the event of short-circuits, thereby isolating the affected system. In the event of an intense fire in the main deck cargo compartment it is possible that all or many of the wire bundles in raceways G and H would be damaged causing short-circuits. This would result in the opening of related circult-breakers, a possible total of 80, of which 58 are located on various cockpit panels. Opening of the circuit-breakers would be accompanied by cockpit warnings and indications such as illumination of amber lights, flashing red lights and gauge indications.