Ice And Rain Protection Flashcards
Overview 1
The Citation Soverign incorporates an ice detection system and an anti ice system.
The primary purpose of anti-icing systems is to prevent the formation of ice on airfoils and engines.
The aircraft surfaces are protected electrically and by engine bleed air.
What is protected by the engine bleed air?
Engine bleed air protects the engine inlet ducts, first stage stator vanes, nose cones, wing leading edges, and horizontal stabilizer leading edges.
Which systems are electrically heated?
The windshields, primary pitot-static System, standby pitot-static System, AoA System, and RAT probes are electrically heated.
Overview 4
The equipment is not designed to provide protection against freezing rain or severe conditions of mixed or clear ice.
During all operations, the pilot is expected to exercise good judgement and to be prepared to alter the flight plan if conditions exceed the capability of the aircraft and equipment.
ENGINE ANTI-ICING
The engine anti-ice system uses direct engine bleed air routed through supply lines and valves to the respective engine inlets, stator vanes, and nose cones.
Each engine inlet has temperature sensors that are monitored by the system.
Horizontal Stabilizer Anti-Icing
The horizontal stabilizer anti-ice system consists of heated left and right horizontal stabilizer leading edges.
The left and right systems operate independently, but can be connected by the cross flow system,
Wing Anti-Icing
The wing anti-ice system consists of heated left and right inboard and outboard wing leading edges.
The left and right wing systems operate independently, but can be connected by the cross flow system.
The wing crossflow system supplies engine bleed air to both left and right wing leading edges, by activating the WING/STAB XFLOW button.
ICE DETECTION SYSTEM
The Citation Soverign relies primarily on visual cues for ice detection. Ice formation is first noticed o. The windshield near the center post or on the leading edges of the wings.
For night operations, ice detection and wing inspection lights help the crew detect ice formation on the windshield and wing leading edges, respectively.
Windshield Ice Detection Lights
Two red LED ice detection lights are on the instrument panel glare shield. The lights are aimed at an unprotected area near the inboard edge of each windshield. When ice begins to form on this area, a red glow is reflected on the glass, indicating that ice may b accumulating on the aircraft.
Wing inspection lights
Two wing inspection lights are in each side of the fuselage, just forward of each wing root. The lights illuminate the outboard portion of the leading edges of the wings during night or low visibility operations.
When are the windshields heated?
They are electrically heated anytime the engines are running.
Current for heating the windshield is provided by?
Current for heating is provided by AC alternator,but controlled by main DC controllers.
Are the systems operative when the engine is shutdown?
No.
Describe the windshield anti-ice system.
The windshield anti-ice system consists of electrically heated left and right main glass windshield panels and left and right forward side windows.
Describe the windshield assembly.
The windshield assembly is a laminated all glass construction with bonded fiberglass edge attachment.
Are all the areas of the windshield heated by the same alternator?
No, some areas are heated from a left alternator while other areas are heated from a right alternator.
