ENGINE AIR INTAKE ICE PROTECTION SYSTEM PRESENTATION
SOURCE
On the V2500, it is the 7th stage from we bled the air. On the CFM-56,
it is from the 5th stage of the High-Pressure (HP) compressor.
VALVE
For each engine, hot bleed air is controlled by an OPEN/CLOSED valve.
In the absence of air pressure, the valve is spring-loaded to the closed
position. With air pressure available and solenoid energized, the valve
closes. In case of loss of electrical power supply, the valve is fully open
provided engine bleed air pressure is high enough. The valve of the
CFM-56 engine needs 9th stage muscle pressure for the opening.
CONTROLS
For each engine, the OPEN/CLOSED valve is controlled by a P/BSW located on the ANTI ICE section of the overhead panel. When the engine Anti-ice (A.ICE) valve is open, the cabin Zone Controller (ZC) determines
the bleed demand for the Full Authority Digital Engine Control (FADEC) system. This decreases the N1 for CFM56 and Engine Pressure Ratio (EPR) limit for V2500 relative to the ambient conditions, the engine operating conditions and the load of the A.ICE bleed.
USERS
The engine air intake is protected by its related bleed air, which heats the inlet leading edge in icing conditions. The hot air is then discharged
overboard.
ECAM PAGE
If at least one of the two engine air intake anti-ice protection systems is
selected ON, a message appears in green on the upper ECAM MEMO
display.
Credit : Rabindar Singh
Sharing is Caring
On the V2500, it is the 7th stage from we bled the air. On the CFM-56,
it is from the 5th stage of the High-Pressure (HP) compressor.
VALVE
For each engine, hot bleed air is controlled by an OPEN/CLOSED valve.
In the absence of air pressure, the valve is spring-loaded to the closed
position. With air pressure available and solenoid energized, the valve
closes. In case of loss of electrical power supply, the valve is fully open
provided engine bleed air pressure is high enough. The valve of the
CFM-56 engine needs 9th stage muscle pressure for the opening.
CONTROLS
For each engine, the OPEN/CLOSED valve is controlled by a P/BSW located on the ANTI ICE section of the overhead panel. When the engine Anti-ice (A.ICE) valve is open, the cabin Zone Controller (ZC) determines
the bleed demand for the Full Authority Digital Engine Control (FADEC) system. This decreases the N1 for CFM56 and Engine Pressure Ratio (EPR) limit for V2500 relative to the ambient conditions, the engine operating conditions and the load of the A.ICE bleed.
USERS
The engine air intake is protected by its related bleed air, which heats the inlet leading edge in icing conditions. The hot air is then discharged
overboard.
ECAM PAGE
If at least one of the two engine air intake anti-ice protection systems is
selected ON, a message appears in green on the upper ECAM MEMO
display.
Credit : Rabindar Singh
Sharing is Caring
