Which of the following is NOT listed as an ECS subsystem?

Which of the following is NOT listed as an ECS subsystem?

• A. OBOGS
• B. Cabin pressurization
• C. Fuel management
• D. Windshield anti-ice and rain removal

Answer: (C)

The Environmental Control System is about managing the crew’s breathing air, cabin pressure, temperature, and visibility in the cockpit. On the Growler, OBOGS provides breathable oxygen, cabin pressurization maintains a safe cabin pressure level during flight, and windshield anti-ice and rain removal ensures the pilot has clear visibility—these are all integral parts of keeping the cockpit environment habitable and controllable. Fuel management, however, deals with fuel quantity, transfer, and balancing, which is part of the aircraft’s fuel system rather than the environmental control system. So fuel management is not an ECS subsystem.

The Environmental Control System is about managing the crew’s breathing air, cabin pressure, temperature, and visibility in the cockpit. On the Growler, OBOGS provides breathable oxygen, cabin pressurization maintains a safe cabin pressure level during flight, and windshield anti-ice and rain removal ensures the pilot has clear visibility—these are all integral parts of keeping the cockpit environment habitable and controllable. Fuel management, however, deals with fuel quantity, transfer, and balancing, which is part of the aircraft’s fuel system rather than the environmental control system. So fuel management is not an ECS subsystem.