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REVIEW NUMBER 4 ANSWERS TO QUESTIONS Q1. THROUGH Q4 - 14023_180
MAINTENANCE AND TESTING - 14023_182

Aviation Ordinanceman 2 & 3 - Aviation theories and other practices
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Figure 6-15.—F-14 M61A1 gun installation. F-14 GUN SYSTEM INSTALLATION The F-14 M61A1 gun system (fig. 6-15) is mounted in the forward fuselage on the left side of the aircraft. Depending upon the mission objective, this gun system can be operated in an A/G mode, A/A mode, or an air combat maneuver (ACM) encounter mode. The computer pilot attack mode (ACM encounter mode) operates in conjunction with the weapon control system, computer signal data converter (CSDC), and the vertical display indicator system to display target data. The manual attack mode is normally used in the A/G mode. It is also used as the primary backup for the ACM encounter mode in case of system malfunction. The M61A1 gun system accommodates a maximum of 676 rounds of 20-mm ammunition. There are 576 rounds in the drum and a total of 100 rounds in the chutes, transfer adapter assembly, and gun. The system can be set by ground maintenance personnel for unrestricted firing, or for rounds limit of 50, 100, or 200 rounds per burst. The HOOK/GUN panel contains a gun-rounds counter that gives a digital readout countdown of the rounds remaining in the gun system. The clearing sector holdback assembly and safety pin (fig. 6-16) is used to clear the gun manually. With the clearing sector holdback assembly installed, the breech-bolt assemblies are diverted to the clearing cam path. Keep the clearing sector holdback assembly and safety pin installed until just before aircraft flight. REVIEW NUMBER 5 Q1. In F/A-18 aircraft, fired projectiles exit the aircraft through the gun blast diffuser assembly that is located _________________________ . Q2. What maximum number of rounds does the M61A1 gun system hold when used on the F/A-18 aircraft? Q3. What component, located in the gun compartment, can be preset to limit the total number of rounds the pilot can fire? Figure 6-16.—F-14 clearing sector holdback assembly and safety pin. 6-17







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