The inertia reel check-out may be grouped into seven steps. The test is shown in figure 6-48.

1. Insert the bridle rod through both the parachute riser loops. Position the inertia reel manual control to UNLOCK. Then grasp the center of the bridle rod and extend the risers to mid position. Hold the risers extended and position the inertia reel manual control lever to LOCK. When you pull firmly on the center of the bridle rod, the risers should not extend.

2. Slowly allow the risers to retract. The risers retracting and ratcheting action should be audible during retraction. The inertia reel control lever should not snap into position, or the test results will not be valid.

3. Slowly position the inertia reel manual control lever to UNLOCK. Grasp the center of the bridle rod and extend both risers to the mid position. Exert a sharp pull on the bridle rod. The inertia reel should lock and the risers should not extend when a firm pull is applied. Slowly allow the risers to fully retract, and then pull the risers again. You should not be able to extend the risers.

4. Position the lever to LOCK, and then UNLOCK and extend and retract the risers. The risers should extend and retract freely.

5. Attach a push-pull gauge to the bridle rod. Pull the gauge straight and extend the risers. You should record the force required to extend them. Repeat the step three to five times. The risers should extend with a force of 5 to 15 pounds. Allow the riser to retract slowly.

6. Position a 24-inch steel rule against the for-ward edge of the yoke and perpendicular to the catapult tubes. Without extending the inertia reel straps, lift the bridle rod and measure the normal extension of the risers. You should record this measurement. Pull on the bridle rod and measure the full extension of the risers. Again, record the measurement. Allow the risers to retract slowly. At full extension, you should observe a minimum of 18 inches. Then, subtract the normal measurement from the extended measurement. The difference between the

Figure 6-48.- Inertia reel assembly check-out.

measurements should be a minimum of 11 inches with a maximum of 25 pounds of force. Allow of total riser travel. the risers to completely retract and remove the spring scale and bridle rod.

7. Position the inertia reel control to LOCK. Attach a spring scale to the center of the bridle rod. Position a push-pull gauge against the forward edge of the control knob parallel to the seat side panel. Apply a 50-pound pull to the bridle rod and maintain this tension while applying a push force to the should move, without binding, to the aft position control knob. The control knob