Fahad Naim - (B787)✓The ground cooling valve lets air go through the ram air circuit and across the heat exchanger. - This air cools the nitrogen generation system (NGS) air when the
The PACK 1 ram air inlet door is seen closing after the APU bleed air was selected to the off position. | By A320 Systems | Facebook
![Speedmaster 1-148-051: 2-Piece Modular Ram Air Intake Manifold | GM LS3 | 98 mm Throttle Body Bore | 4-Bolt Flange | Idle-7,000 RPM Range | Non-EGR | Aluminum | Polished Finish | Fuel Rails Included | Sold Individually - JEGS Speedmaster 1-148-051: 2-Piece Modular Ram Air Intake Manifold | GM LS3 | 98 mm Throttle Body Bore | 4-Bolt Flange | Idle-7,000 RPM Range | Non-EGR | Aluminum | Polished Finish | Fuel Rails Included | Sold Individually - JEGS](https://www.jegs.com/images/photos/700/746/746-1-148-051.jpg)
Speedmaster 1-148-051: 2-Piece Modular Ram Air Intake Manifold | GM LS3 | 98 mm Throttle Body Bore | 4-Bolt Flange | Idle-7,000 RPM Range | Non-EGR | Aluminum | Polished Finish | Fuel Rails Included | Sold Individually - JEGS
![airliner - What exactly are those openings in the bellies of many jetliners? - Aviation Stack Exchange airliner - What exactly are those openings in the bellies of many jetliners? - Aviation Stack Exchange](https://i.stack.imgur.com/mJHRy.jpg)