LR45 HYDRAULIC SYSTEM CAS (9/25/2023)

Question 1

AUX HYD PUMP LO (YELLOW)

Answer 1

Auxiliary hydraulic pump ON with pressure < 1,900 psi (> 5 seconds)

Chock aircraft prior to engine shutdown to prevent aircraft movement.

Question 2

AUX HYD QTY LO (YELLOW)

Answer 2

Low auxiliary hydraulic reservoir quantity (approx. 1.3 qts remaining), inhibits HYD XFLOW

Chock aircraft prior to engine shutdown to prevent aircraft movement.

Question 3

BRK ACUM PRESS (YELLOW)

Answer 3

Emergency brake accumulator pressure < 1,200 psi or > 3,600 psi

• Chock aircraft prior to engine shutdown to prevent aircraft movement.
• Brake accumulator pressure will normally change with temperature. Normally the pressure will drop as temperature drops. A recharge of the accumulator is not necessary unless there are hydraulic pressure failures.

Question 4

MAIN HYD PRESS (YELLOW)

Answer 4

Main hydraulic system pressure < 1,500 psi or > 3,600 psi

Question 5

L HYD PUMP LOW
R HYD PUMP LOW
L R HYD PUMP LOW
(WHITE)

Answer 5

L or R engine hydraulic pressure < 1,900 psi

This CAS may illuminate during gear extensions with single engine operations.

Question 6

HYDR XFLOW ON (WHITE)

Answer 6

Hydraulic crossflow valve is open

Question 7

MAIN HYD QTY LO (WHITE)

Answer 7

Main hydraulic fluid quantity is low (approx. 5.9 quarts remaining)