TM 1-1520-240-104-2-4 Figure 4-2-2. Machine Gun M60D4-2-9. Inflight Operation. Inflight operation con-sists of the following:Inflight operation consists of the following:1. Preparation for firing.a. Check the machine gun to see that it issecured with a quick-release pin on thepintle (fig. 4-2-9).b. Check the machine gun for freedom ofmovement in elevation, depression,and traverse.c. Load the linked cartridges into the ma-chine gun.NOTEInspect the linked cartridges to make surethey are securely positioned in the links.NOTEThe pilot will alert the gunners when there isneed to fire the machine gun.2. Firing.With the machine gun loaded and aimed, push the safetybutton to fire (F) position. Because of the low rate of fire,
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