Learning Objective: Recognize the com-ponents, parachute and seat separation operations, seat subsystems, component maintenance, corrosion control, and lubrication and emergency cleaning pro-cedures for the Stencil SJU-8/ A ejection seat.

The Stencel SJU-8/ A ejection seat is used in the A-7E aircraft. It uses thrust from a ballistic catapult and two seat-back rockets to propel it from the aircraft. (See figures 6-29, 6-30, and 6-31.) The seat provides escape capabilities during takeoff and landing emergencies from zero speed and zero altitude to speeds and altitudes of 600 knots and 50,000 feet. The system incorporates a seat-mounted, environmentally protected parachute, survival package with raft, emergency oxygen supply, and emergency locator beacon. The parachute is stored in a non-adjustable headrest. The front surface of the seat bucket provides a buffer for the calves of the legs, which are automatically restrained by straps to prevent flailing during ejection. The sides of the bucket extend upward and forward from the seat to protect the legs during canopy penetration.

Figure 6-29.- SJU-8/ A ejection seat assembly.

Figure 6-30.- SJU-8/ A ejection seat assembly (front view).

Figure 6-31..- SJU-8/ A ejection seat assembly (back view).

The Stencel system has four modes of opera-tion. As you read the material in the following paragraphs, carefully note the differences between these modes. The material describing the sub-systems and components will amplify the modes of operation by explaining how and when each mode is activated. The remainder of this section will address the test equipment and test procedures used in the maintenance of the system.