Aviation Electronics Technician 1 - Historic Naval Ships Association

Figure 7-25.-Pylon/rack assembly.circuitry for control and release of search and killstores from the aircraft.In the P-3C aircraft, system control is concentratedbetween the pilot and TACCO, with thecopilot and other crew members having minor controlfunctions. In the S-3A aircraft, the control isconcentrated between the TACCO and copilot. Thepilot and SENSO also have control functionsavailable. In both aircraft, the pilot has final controlover the release of stores through the master arm andsearch power switches.The basic operation of the release and controlsystems of both aircraft are discussed in the followingtext. Remember, this information is of a generalnature. For more detailed information, refer to theaircraft’s MIMs.OperationThe system’s primary mode of operation is theautomatic (on-line) mode. This mode uses thecomputer, logic units, crew member’s keysets, bombbay rack lock panel (P-3C), multipurpose datadisplays, pilot’s armament control panel (ACP), andother displays and panels to control and monitor thesystem. The manual mode uses the same components,less the computer and logic units, throughthe TACCO’s manual weapon control box (P-3C) andthe main auto key select on the pilot’s ACP (S-3A).AUTOMATIC MODE.— The automatic modepermits a method of search and kill store managementthat allows maximum flexibility and control of thesystem while minimizing the amount of necessarymanual action required by the aircrew. In theautomatic mode, the system is designed to have thecomputer and its subsystems perform the followingfunctions:1. Maintain an up-to-date inventory of all storeson the aircraft and provide weapon inventory that canbe called up for display on the TACCO’s auxiliaryreadout (P-3C) or any crew member’s MPD (S-3A).2. Determine the availability of a selectedweapon and select the weapon station from which theweapon is to be released (station priority).3. Energize the armament system relays at theproper time, in the proper sequence, and for theproper time duration to accomplish a store releaseunder joint computer and operator control.4. Instruct the operator, by cuing via a lightdisplay or readout on the MPD, to perform a manual7-19