When uncoupling ground air lines, what is the action you perform if the system is pressurized?

When uncoupling ground air lines, what is the action you perform if the system is pressurized?

• A. Operate the bleed valve on the ground air to release the pressure
• B. Immediately disconnect the hose without releasing pressure
• C. Close the main supply valve
• D. Remove the pink slip from the valve

Answer: (A)

Relieve the stored energy in the line before disconnecting. When the system is pressurized, a sudden release can cause the hose to whip or spray high-pressure air, risking injury or damage. The proper action is to use the bleed valve on the ground air unit to vent the pressure to the atmosphere gradually. Do this until the pressure gauge shows zero, then disconnect. Closing the main supply valve won’t remove pressure already in the hose, and removing a pink slip has no role in depressurizing.

Relieve the stored energy in the line before disconnecting. When the system is pressurized, a sudden release can cause the hose to whip or spray high-pressure air, risking injury or damage. The proper action is to use the bleed valve on the ground air unit to vent the pressure to the atmosphere gradually. Do this until the pressure gauge shows zero, then disconnect. Closing the main supply valve won’t remove pressure already in the hose, and removing a pink slip has no role in depressurizing.