O2 and Emergency Equipment

Question 1

Q1: Name the three different oxygen systems onboard the A220

Answer 1

A: Flight Deck Oxygen, Cabin Oxygen and portable oxygen.

Question 2

Q2: What microphones disable and enable once the mask stowage box doors are opened?

Answer 2

A: The headset and handset microphones are inhibited, and the oxygen mask microphone is automatically enabled.

Question 3

Q3: What is the function of the N/100% oxygen supply lever in N (Normal)?

Answer 3

A: The regulator supplies a mixture of oxygen and cabin air to the mask. At 35000ft the air inlet on the regulator closes and 100% pure oxygen will be delivered regardless of selector position.

Question 4

Q4: What are the two functions of the O2 PRESS TO TEST AND RESET control lever?

Answer 4

A: It allows the testing of oxygen flow without removing the mask. It also closes the flow of oxygen after usage and resets the microphone to enable headset communication.

Question 5

Q5: What is the location of the overboard discharge indicator?

Answer 5

A: Located on the lower left side of the fuselage nearby the ground servicing panel.

Question 6

Q6: What is the normal cylinder pressure for the cabin oxygen system?

Answer 6

A: 1850 PSI

Question 7

Q7: What system provides oxygen for the individual cabin crew oxygen masks?

Answer 7

A: A chemical oxygen generator located at each passenger seat, cabin crew station and galley seat. In the lavatories an oxygen cylinder is used.

Question 8

Q8: When does the passenger oxygen masks automatically deploy?

Answer 8

A: If the cabin altitude exceeds 14500’.

Question 9

Q9: What alternate (manual) method ls available to deploy the passenger
oxygenmasks?

Answer 9

A: Using the PAX OXY switch on the cockpit overhead panel.

Question 10

Q10: What is the location of the two portable oxygen bottles?

Answer 10

A: There is one bottle located near each flight attendant station.

Question 11

Q11: What is the location of the four Protective Breathing Equipment devices?

Answer 11

A: One in the flight deck, two in the FWD galley and one in the AFT galley.

Question 12

Q12: What is the available emergency equipment in the flight deck?

Answer 12

A: Portable fire extinguisher (Halon), fire protective gloves, three life vests, two flashlights, one crash axe and a flight crew emergency escape line.

Question 13

Q13: How many portable fire extinguishers are onboard the A220 (minimum)?

Answer 13

A: 4 (one cockpit, the remaining bottles are located in the FWD and AFT galleys).

Question 14

Q14: What other flight deck emergency equipment is located near the portable fire extinguisher?

Answer 14

A: Fire protective gloves and the crash ax.

Question 15

Q15: What aircraft doors are equipped with slides assemblies?

Answer 15

A: The four main cabin doors (passenger and service doors) and the two over-wing emergency exits.

Question 16

Q16: Which emergency slides are always armed?

Answer 16

A: The two over-wing emergency exit slides.

Question 17

Q17: What is the meaning of a flashing red LED indicator on a flashlight?

Answer 17

A: The battery level is low (normally automatically charged when in the stowed position)

Question 18

Q18: What is the location and purpose of the two safety lines?

Answer 18

A: Each line is located at each over wing emergency exit to assist in an evacuation after a ditching event.

Question 19

Q19: How can the evacuation command horn be activated?

Answer 19

A: Using the flight station EVAC CMD pushbutton on the overhead panel or from the attendant stations.

Question 20

020: Where are the megaphones and first aid kits located in the cabin?

Answer 20

A: In the FWD and AFT galley.