TM 10-1670-280-23&P 0012 00
b. Grasp the vent lines, with the bridle loop positioned to one side, and place the screw pin shackle over
the vent lines.
c. Rotate the vent lines down over the shackle legs to form a girth hitch.
d. Disconnect the center line from the bridle loop.
e. While installing the screw pin, place the end loop of the center line on the screw pin.
Tighten the screw pin and pull the girth hitch until tight.