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Challenger 350; Air Conditioning / Pressurization Test
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Challenger 350; Air Conditioning / Pressurization Test...
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Challenger 350; Air Conditioning / Pressurization Test Where does high-pressure (HP) bleed air go? - ANSWER High pressure (HP) bleed air from the engines is routed through high-pressure valves and ducting to the wing anti-ice system FCOM2 02- 02-1 Where does intermediate pressure (IP) bleed air go? - ANSWER Intermediate pressure (IP) air from the engines is routed through intermediate pressure valv es to the environmental control system (ECS) FCOM2 02- 02-1 Cabin and cockpit temperature range in normal mode - ANSWER 15 °C to 35 °C FCOM2 02- 02-2 Cabin and cockpit temperature range in manual mode - ANSWER 10 °C to 70 °C FCOM2 02- 02-2 BLEED AIR MANIFOLD - ANSWER - Located in the engine pylons and aft equipment bay - Divided into the right side and left side by a crossbreed (XBLEED) valv e. - Engines provide bleed air to their respective sides of the manifold. - APU and ground air cart are supplying air to the right side of the cross bleed valve only FCOM2 02- 02-2 What are the 4 check valves that are installed in various locations in the bleed air ducting? - ANSWER - An intermediate pressure check valve is installed in each engine bleed air duct (2) to prevent reverse flow into the engines - One is installed at the external ground air servicing connector to p revent the loss of air to the atmosphere - One is installed in the APU bleed air duct to prevent the reverse flow of manifo ld air to the APU when the APU is shut down The check valves are not depicted on the ECS or ANTI-ICE synoptic displays FCOM2 02-02-2 What is the task of the Intermediate Pressure Valves? - ANSWER Intermediate Pressure Air Regulation to the ECS Engine bleed air pressure increases proportionally with N2 compressor spe ed. The intermediate pressure valve limits the engine discharge pressure to 50±3 psi for t he ECS. When the N2 compressor speed is low and the engine bleed air pressure is les s than the regulated value, and at least 10 psi or greater, the valve is fully open FCOM2 02- 02-3 What happens when an IPV fails? - ANSWER When an IPV fails and the manifold pressure *exceeds 60 psi*, a L (R) BLEED FAIL (C) CAS message is displayed FCOM2 02- 02-5 Can the Intermediate Pressure Valves be pilot-controlled? Under what conditions are the valves closed? - ANSWER Yes. The valves are pneumatically operated and electrically controlled by the L (R) BLEED switches on the AIR COND/BLEED panel. The bleed air valves are in a closed position when: − Aircraft engines are shutdown − Power is lost to valves − Associated ENG FIRE switch is selected − Bleed air valves are selected closed at the AIR COND/BLEED control panel FCOM2 02- 02-3 What is the purpose of the High Pressure Valves? - ANSWER Hight Pressure Air Regulation to the wing anti-ice system The high pressure valves regulate the engine high pressure bleed to 36±3 psi. Th is high-pressure air is then routed to the wing anti −ice system FCOM2 02- 02-3 Can the High Pressure Valves be pilot controlled? Under what conditions are the valves closed? - ANSWER Yes. The valves are pneumatically operated and electrically controlled by the WING SOURCE switch and WING switch on the ANTI −ICE control panel. The high pressure valves are in the closed position when:The benefits of buying summaries with Stuvia:
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