LR45 OXYGEN SYSTEM CAS (12/25/2023)

Question 1

OXYGEN OFF (YELLOW)

Answer 1

Oxygen line pressure < 50 psi, or regulator OFF

The OXYGEN OFF amber CAS should not normally be seen in flight unless there is an electrical malfunction of a pressure switch. An oxygen line failure or a complete loss of oxygen bottle pressure would also be accompanied by the OXYGEN QTY LOW amber CAS.

Question 2

OXYGEN PRESS HI (YELLOW)

Answer 2

Oxygen bottle is over-pressurized (>2,500 psi); quantity digits will be amber dashes

Question 3

OXYGEN QTY LOW (YELLOW)

Answer 3

Oxygen quantity is low (<540 psi); modification dependent

Question 4

PAX OXY FAIL (YELLOW)

Answer 4

PAX oxygen deploy valve failed, and may not allow deployment (auto or man)

Question 5

PAX OXY DEPLOY (WHITE)

Answer 5

Electrical command provided to PAX oxygen deploy valve to deploy (auto or manual)