0002 00  TM 10-1670-287-23&P  8.  Main Riser Assembly. The main risers are constructed of Type VII nylon webbing. Each riser is 36-  inches in length. The bottom end of the main risers incorporates two riser release rings, a grommet,  and a main canopy release-locking loop. A channel is sewn to the back of the rear risers for stowage  of the main canopy release cable. The back of the rear risers incorporates control line keepers used  to stow excess control line, control line toggle keepers for stowage of control line toggles and control  line guide rings.  9.  Free Fall Secondary FF-2. The automatic ripcord release is designed to open the main parachute  compartment automatically. It consists of a release mechanism mounted in a metal case and is  designed to work mechanically on barometric pressure. The arming cable, power cable, and the  power cable housings are located on one side of the case. The 14-inch power cable is attached to  the container base plate and the power cable is attached to the ripcord-locking pin. Refer to TM 10- 1670-300-20&P for operational limitations, maintenance, and repair.  Change 1  0002 00-11  MRIRIV$_{ISSUE}$ TYPED/IMK TIMEDEL AY SEC SERIALNO.$^{REFNO.}$ MODNO. A U T O M A T $_{I}$C P A R A C HU$^{T}$$^{E}$$^{R}$$^{E}$$^{L}$$^{E}$ A S E MILLIBARS 5 7 0 560$^{5}$$^{5}$$^{0}$ $^{W}$I T H D R A $_{W}$K E Y R U T A H F L $^{V}$E $^{G}$I N D D N T R E N I $^{E}$P $_{R}$E S A S RESET INDICATOR Reset Indicator  Flangible Cap  Barrel Reset Key Access Hole Plug Rectangular Key  Knurled Locking Nut Withdrawal Hook  Rubber Bumper  Power Cable  14-IN.  Arming Pin  Assembly  Millibar Dial  Knob Millibar Window  Toggle Keepers  Riser Release  Rings Trim Tabs  Excess Control Line Keepers Control Line Guide  Rings