Figure 7-3.—Emergency oxygen schematic

Figure 7-3.—Emergency oxygen schematic. these are high-performance aircraft that can operate at high altitudes. Therefore, in addition to containing survival gear, the kit also furnishes oxygen to the aviator when he ejects at altitudes where there is not enough oxygen to maintain consciousness. When the aircrewman ejects from the aircraft, the following events occur: The automatic actuation lanyard for the emergency oxygen system actuates the reducer assembly at seat ejection. The aircrewman is then supplied emergency oxygen for descent (fig. 7-3). If automatic actuation of the emergency oxygen system fails, the emergency oxygen system may be actuated by the aircrewman by means of the manual oxygen release (green ring). The radio beacon is automatically actuated by another actuation lanyard. The beacon provides a con- tinuous signal during descent. When a safe altitude is reached, the air- crewman pulls the kit release handle free of the kit. This unlocks the containers and the lower half falls away but remains attached by the dropline assembly. The life raft, attached to the dropline, is automatically inflated. 239.555 INSPECTIONS Your concern with this unit is mainly in inspecting it at scheduled intervals or when damage might be suspected. There are three types of inspections made at routine intervals: the turnaround/daily/preflight/postflight/transfer, special inspections, and the more detailed ac- ceptance/phased/SDLM inspections. In addi- tion, conditional inspections are unscheduled inspections required as the result of a specific situation or set of conditions; for example, hard- landing inspections or any inspection directed by higher authority that is not ordered in a technical directive. The turnaround/daily/preflight/postflight or transfer inspections consist of a visual-type inspection performed in conjunction with the aircraft inspection requirements for the aircraft in which the survival kit is installed. These inspections are performed by line personnel (plane captain) or delegated aircrewman who have been instructed and found qualified by the aviator’s equipment branch. The special (7/14 day, etc.) inspections are performed on inservice survival kits installed in 7-3