Day 9 Progress Check Flashcards
What is the purpose of the EAI Pressure Sensor?
Measure duct pressure
What is the fail-safe mode of the EAI valve controller in case of a failure?
Open the valve (ice protection ON)
What is the purpose of a timer circuit in electric anti-ice systems?
Cycles heating elements off and on
What is the heat source for the Boeing 777 EAI system?
Bleed air
Which protection measure prevents overload in electric anti-ice systems?
Overloads trip power relay
What do the Airfoil and Cowl Ice Protection System (ACIPS) control cards do?
Send electric control signals to the EAI controller
What is the purpose of serially cycling elements off and on in electric anti-ice systems?
To avoid massive current draw
To shed accumulated ice
To control temperature
Correct: All of the above
How is anti-ice protection typically applied to turbo prop air inlets?
Correct: All listed
None listed
Mechanical inertial separators in the inlet duct
Electrically heated inlets
What monitors duct leaks in the EAI system?
Duct Leak and Overheat Detection System (DLODS)
What does the EAI EICAS display show when the anti-ice is ON and temperature > 50F with no ice detected while in flight?
“ICING ENG” caution message
How is the EAI system monitored in terms of control?
Both b and c
When does anti-ice system utilization become necessary?
OAT less than 50℉ and visible moisture
In AUTO mode, when does the EAI control valve open?
When ice is detected
What triggers the DLODS in case of an overheat event?
Fan case sensor
In the Boeing 777 Engine Anti-ice (EAI) system, what is the heated surface that prevents ice accumulation?
Leading edge of engine cowl
