Block 5: ALSS/EGRESS-C. Canopy/Ejection Seat

Question 1

What is the purpose of the ejection seat?

Answer 1

To provide aircrew a place to sit during normal conditions and for propelling occupant out during emergency situations.

Question 2

What type of ejection seat is used?

Answer 2

SJU-17A (V) 2/A Series

Question 3

What does NACES stand for?

Answer 3

Navy Common Ejection Seat

Question 4

Explain the ejection seat?

Answer 4

It is automatic, cartridge operated, and rocket assisted,

Question 5

How is the ejection system initiated?

Answer 5

By pulling the ejection control handle located on the front of the seat bucket.

Question 6

How is the ejection seat system operated?

Answer 6

By ballistic gas pressure, produced by ejection seat initiators that fire when the ejection control handle is pulled, traveling through the system.

Question 7

How many cartridges does each seat initiator contain?

Answer 7

Two, left and right.

Question 8

What is the function of the gases from the right cartridge?

Answer 8

Starts the canopy jettison sequence, activates the seat electronic sequencer, activates seat restraints and fires the seat catapult after a delay inserted by the escape system.

Question 9

What is the function of the gases from the left cartridge?

Answer 9

They redundantly activate the seat electronic sequencer and also provides a backup source to fire the seat catapult should the primary path from the right cartridge fail.

Question 10

Is there an emergency oxygen system in the seat pan?

Answer 10

Yes

Question 11

What is the size of the Emergency Oxygen cylinder?

Answer 11

100 cubic inches.

Question 12

What are the component’s of the emergency oxygen system?

Answer 12

An oxygen cylinder, pressure reducer, and associated piping are mounted on the underside of the seat platform. A green manual operating handle is mounted on the left side of the platform and a cylinder contents gage is on the inside face of the left hand thigh support.

Question 13

How does the emergency oxygen system operate during the ejection sequence?

Answer 13

It is automatically activated by a lanyard connected to the cockpit floor. An oxygen/communications hose is connected to fittings on the left rear top of the rigid platform and provides connections between the seat occupant and the aircraft and survival kit system.

Question 14

What is the Canopy system?

Answer 14

It is a pyrotechnically operated emergency canopy removal.

Question 15

What is the purpose of the canopy system?

Answer 15

It provides the capability to explosively jettison the canopy from the aircraft in the case of emergency.

Question 16

Is canopy jettison automatic when seat ejection is initiated?

Answer 16

Yes

Question 17

How do you initiate canopy jettison without initiating seat ejection?

Answer 17

The CANOPY JETT lever in the cockpit.

Question 18

How is the canopy operated during ground maintenance?

Answer 18

It’s opened and closed by electrical means using an external canopy control switch or an internal canopy control switch. Manual controls provide backup operation of the canopy when electrical power is unavailable or when electrical control fails.