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ICE AND RAIN PROTECTION Description Vol. 2 14.10.2
Oct 05/06
Wing Anti-Ice System
Figure 14.10.1
Components and Operation
Anti-Ice Ducts
Bleed air, taken from the 14th-stage bleed air manifold, is ducted to the wing and ejected from the piccolo tubes onto the inner surfaces of the leading edges. After heating the leading edges, the air is exhausted overboard through louvers located beneath each wing leading edge. The piccolo tubes extend the full length of the leading edges.
ICE AND RAIN PROTECTION Description Vol. 2 14.10.3
Oct 05/06
Wing Anti-Ice Components Figure 14.10.2
Wing Anti-Ice Valves
The left and right wing anti-ice valves are electrically controlled, pneumatically operated, pressure-regulating shutoff valves. The valves are spring-loaded to the closed position when no 14th-stage pressure is available, or electrical control power is lost. The wing anti-ice system is normally operated in the NORM mode. A backup mode (STBY mode) exists should NORM mode fail. The valves are set to regulate at 35 ± 5 psig. During modulation, the regulated pressure will be lower than this value.
Wing Anti-Ice Controller
The wing anti-ice controller maintains the temperature of the left and right wing leading edges when NORM mode is selected. The wing anti-ice controller is bypassed when STBY mode is selected.
NORM Mode
When the WING ANTI-ICE switch is selected to the NORM position, the wing leading edge temperatures are continuously monitored by their respective control sensor. The wing anti-ice controller modulates both wing anti-ice valves simultaneously to maintain a constant wing leading edge temperature (88°C/190°F).
The green L HEAT/R HEAT lights, located on the ANTI-ICE panel, will illuminate when the respective wing leading edge is sufficiently heated to prevent ice accumulation (above 29°C/85°F).
ICE AND RAIN PROTECTION Description Vol. 2 14.10.4
Oct 05/06
STBY Mode
When the WING ANTI-ICE switch is selected to the STBY position, the wing anti-ice controller is bypassed, and both wing anti-ice valves are independently controlled by their respective standby thermal switch. The valves will cycle either fully open or fully closed, to maintain the wing leading edge temperature within a predetermined temperature range (49°C/120°F and 82°C /180°F).
Wing Overheat
Should a wing leading edge reach a temperature of 129°C/265°F or greater, the WING OVHT warning EICAS message will appear, accompanied by the “WING OVERHEAT” voice warning and the flashing MASTER WARNING lights. Once the temperature drops below this value, the WING OVHT warning message will be removed.
14th-Stage Isolation Valve
The isolation valve allows both wings to be anti-iced from a single source, by using the crossover duct. The 14th-stage isolation valve is normally closed during wing anti-icing. Should a wing anti-ice valve fail, or if an engine is not capable of supplying 14th-stage bleed air, the isolation valve can be selected open by the flight crew, allowing the operative system to anti-ice both wings.
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本文链接地址：庞巴迪挑战者605公务机机组操作手册 CL605-防冰和排雨 ICE and RAIN PROTECTION(2)
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