O2

Question 1

Slow decent - dual engine failure at 14,500, PAX OXYGEN AUTO FAIL.
Describe procedure.
Describe threat with deploy mode.

Answer 1

Primary focus on dual engine fail which calls for speed 185kts.

DEPLOY mode increases O2 consumption, flow rate is higher and so the duration is decreased

Question 2

Part 135, climbing through FL350, crew is alternating wearing O2 masks.

Flight duration is 3.5 hours above 350.

Answer 2

Use O2 duration charts during preflight to ensure adequate o2 onboard.

Question 3

Rapid depressurization, emergency descent just past equal time point. O2 masks was selected to Normal (N) while flying at 410.
Cabin altitude climbs to 410

Describe o2 flow when cabin is above 350 and in Normal.

Answer 3

Smart masks have built in sensor that regulates flow and it will increase to 100 automatically.

Question 4

O2 Limits?

Answer 4

FCOM - o2 duration tables.
When o2 drops to 700 liters - OXYGEN QUANTITY LOW appears