When does the L or R OIL PRESS LO warning light illuminate?

When does the L or R OIL PRESS LO warning light illuminate?

• A. Its system pressure decreases below 40 PSI.
• B. Oil temperature exceeds 150 C
• C. Fuel flow to the engine stops
• D. Hydraulic fluid pressure drops below 1000 psi

Answer: (A)

Oil pressure is the critical measure of engine lubrication. The left and right OIL PRESS LO indicators illuminate when the oil pressure in the respective engine falls below a specific threshold, about 40 psi. This alert gives you an early warning that lubrication may be insufficient, risking bearing and rotor damage if pressure continues to fall. The number 40 psi is chosen so you’re warned before oil pressure becomes dangerously low. Other warnings relate to different systems: oil temperature high would trigger an oil temp warning, a loss of fuel flow would involve a fuel system alert, and a drop in hydraulic pressure involves the hydraulic system warning.

Oil pressure is the critical measure of engine lubrication. The left and right OIL PRESS LO indicators illuminate when the oil pressure in the respective engine falls below a specific threshold, about 40 psi. This alert gives you an early warning that lubrication may be insufficient, risking bearing and rotor damage if pressure continues to fall. The number 40 psi is chosen so you’re warned before oil pressure becomes dangerously low. Other warnings relate to different systems: oil temperature high would trigger an oil temp warning, a loss of fuel flow would involve a fuel system alert, and a drop in hydraulic pressure involves the hydraulic system warning.