AM.II.H.S10
SkillInspect a vacuum system filter for serviceability.
From the FAA library
- Chapter 10: Aircraft Systems › Vacuum Systems › Twin-Engine Aircraft Vacuum System Operation
minus sign is usually not presented, as the importance is placed on the magnitude of the vacuum developed. In relation to an absolute vacuum (0 psi or 0 "Hg), instrument vacuum systems have positive pressure. Figure 10-91 shows ... typical engine-driven pump vacuum system containing the above components. A pump capacity of approximately 10 "Hg at engine speeds above 1,000 rpm is normal. Pump capacity and pump size vary in different aircraft, depending on the number…
- Chapter 10: Aircraft Systems › Sources of Power for Gyroscopic Instruments › Pressure-Driven Gyroscopic Instrument Systems
Figure 10-91. A typical pump-driven vacuum system for powering gyroscopic instruments. A schematic of this twin-engine aircraft vacuum system is shown in Figure 10-92. Note the following components: two engine-driven pumps, two vacuum relief valves ... flapper type check valves, a vacuum manifold, a vacuum restrictor for each turn and bank indicator, an engine four-way selector valve, one vacuum gauge, and a turn-and-bank selector valve. Not shown are system and individual instrument filters…
- Chapter 16: Cabin Environmental Control Systems › Vapor Cycle Air Conditioning › System Servicing
Water is removed from the system by evacuation. Anytime the system refrigerant charge falls below atmospheric pressure, the refrigerant is lost, or the system is opened, it must be evacuated before recharging. Evacuating a vapor cycle air conditioning system ... also known as pumping down the system. A vacuum pump is connected and pressure inside the system is reduced to vaporize any water that may exist. Continued operation of the vacuum pump draws the water vapor from the system…