AUTOMATIC RIPCORD RELEASE, MODEL 451
OPERATION UNDER USUAL CONDITIONS - CONT
OPERATING PROCEDURES - CONT
a. The parachute system must have an AR2 and power cable assembly correctly installed
and routed to the reserve parachute. Ensure that the position of the AR2 in the pocket is
the same as when worn by a jumper.
b. Open top flap of parachute to expose the reserve ripcord pins.
c. Refer to Figure 1. Slide the metal head of the slack checker under the power cable from
the right side so the cable slips into the curved groove between the metal head and plastic
handle. Engage the two contact points on the hooked end of the slack checker with the
mouth of the end fitting of the power cable housing. The slack checker should be held flat
against the parachute pack. The two contact points must be engaged at all times to
ensure proper inspection.
d. Refer to Figure 2. Grasp the slack checker with the right hand, palm down, and with the
thumb pressed into the curved recess. Grasp the swaged section of the ripcord pin with
left hand. Simultaneously rotate the slack checker and ripcord pin in the directions shown
by the arrows. Hold the ripcord pin with the left hand in a fixed position when it becomes
e. Apply force as necessary to rotate the slack checker until all of the slack in the power
cable has been taken up. Ensure that the pin does not slip out of the closing loop of the
parachute. Note the position of the swaged end of the power cable eye with respect to the
index surface on the slack checker:
Refer to Figure 3. If the power cable assembly is correctly routed and installed, and
has not been damaged, the end of the eye should not extend past the index surface.
Any amount of extension past the index surface may mean the ripcord pins will
not be pulled, which may result in death of parachutist.
Refer to Figure 4. If the end of the eye does extend past the index surface, then
something is wrong with the cable routing, or the power housing (conduit) may be
damaged. The power cable assembly should be removed from service immediately.
The rigger shall record satisfactory completion of inspection with the slack checker in the
main parachute log record book (DA Form 3912). The slack checker test will be
annotated in the JUMP, INSPECTION AND REPACK DATA section, in the area marked
BAG NUMBER as follows: SC Test PASS/FAIL.