Interior Preflight

Question 1

How it the O2 mask properly checked

Answer 1

Press the RESET/TEST switch to check O2 is flowing. Turn SPKR; Mic/ Boom switch to Boom on; press TEST/RESET should hear speaker sound.

Question 2

What is the difference between Normal and 100% selection on the O2 mask

Answer 2

Normal-dilutes O2 with ambient air. 100% delivers pure oxygen at a pressure dependent on cabin altitude.

Question 3

What does the Emergency Flow Control Knob do?

Answer 3

Regulates demand (nomal) or constant flow (Emergency). Press to Test purges mask of smoke and fumes.

Question 4

What are the memory items Smoke/Fire/Fumes?

Answer 4

O2 mask & goggles don/100%/Emer
Crew commo establish comms
AC/DC Utility-Off

Question 5

What are the differences for the selector on the Passenger O2 control panel located on the right side next to the co-pilot? Closed/ Normal/ Override

Answer 5

Closed: Stops O2 supply to the drop-down masks.
Normal: Masks will deploy when cabin altitude is greater than 14,500’ and O2 is supplied to the mask.
Override: Mask deploy and O2 is supplied.

Question 6

Passenger Mask are good for continuous use up to what altitude?

Answer 6

25,000’