Oxygen

Question 1

What are the three positions of the oxygen supply control knob and their functions?

Answer 1

CREW ONLY: disables automatic deployment of passenger oxygen masks
PAX AUTO: enables automatic deployment of passenger oxygen masks
when cabin pressure altitude is above 14700 ft (+300/-300 ft)
PAX OVRD: deploys the passenger oxygen masks regardless of
cabin altitude, if the

Question 2

ADV? function?
what QRC do you use it on?

Answer 2

Auto Dilution Valve
- When open it allows cabin air into the mask.
- When closed prevents cabin air from entering mask

SMOKE/FIRE/FUME
SMOKE EVAC

Question 3

When does the ADV automaticly close?

Answer 3

Cabin depressurization
Cabin altitude of 8,300-10,000ft will make it close

Question 4

Pax O2 masks auto deploy when?

Answer 4

Cabin altitude of 14,700ft +/-300ft