Ice and rain protection

Question 1

What areas on the 175 are protected with Anti-Ice? How many detectors? How long does A/I stay on for?

Answer 1

Wing, Engine, Windshield, Air Data Smart Probes

detected by two detectors

Engine and Wing anti ice valves stay open for 2 minutes after icing is no longer detected

Question 2

What are the Windshield Wiper settings? Limitations and Logic?

Answer 2

Timer = 8 second delay between wipes

Max speed is 250 and will stop if operating on a dry window (torque sensor)

Question 3

When will the ADSP heat turn on automatically?

Answer 3

When One Engine is running or airborne 2 TATs and 4 ADSPs electrically heated

Question 4

What happens when the potable water dump button is pressed?

Answer 4

Starts dump sequence, bar illuminates, and drainage begins

Question 5

When will potable water drainage stop?

Answer 5

Landing Gear extended

Fault in the water drain mast

Button pressed again

Question 6

Will there be a test for the windshield heat?

Answer 6

Yes, when a single AC power is established the windshield heating heating controller performs a 120 second BIT routine and heats up each windshield then removes power from both windshields.

Question 7

When will the windshield heat turn on automatically?

Answer 7

The system only operates normally if there are at least TWO AC electrical sources in Auto

Question 8

What about a single AC source for windshield heating?

Answer 8

Only the left windshield heating is powered when there is a single AC power source. If the left windshield heating system fails, the right windshield heating becomes available

Question 9

When are the engines heated on the Ground

Answer 9

Upon engine start if ENG or ALL is selected in the T/O Dataset in the MCDU

Question 10

When are the engines heated in Flight?

Answer 10

When the airplane detects ice once it reaches 1700 AFE or the aircraft has been airborne for 2 minutes

Question 11

When are the wings heated in Flight?

Answer 11

When the airplane detects ice once it reaches 1700 AFE or the aircraft has been airborne for 2 minutes

Question 12

When are the wings heated on the Ground?

Answer 12

Upon reaching 40 knots wheel speed if ALL is selected in the T/O Dataset in the MCDU

Question 13

What needs to happen if one or both ice detectors are failed?

Answer 13

The crew must set the ice protection mode to ON to run both the engine and wing A/I

Question 14

What kind of bleed does the A/I system need?

Answer 14

Engine Bleed. APU bleed Air is not sufficient Bleed air can be used for A/I, PACKs, Water Pressurization, and Starting APU/Engine

Question 15

What slats are heated with wing A/I? And does the tail get heated?

Answer 15

The outer 3 and the tail does not have A/I capability

Question 16

When will the Ice and Rain Protection Self Tests happen and how long do they last for?

Answer 16

Wing anti ice system (SAI IBIT) will self test 10 min after T/O or at 10,000ft AFE whichever occurs first The (SAI IBIT) duration is 60 seconds (maximum) the test can be finished earlier if all slat temp sensors have an increase of 10 degrees Fahrenheit

Question 17

If we lose our detectors, do we lose our anti ice system?

Answer 17

No just the detection, we just have to manually turn on the A/I

Question 18

When you land and taxi on contaminated surfaces what switch needs to be turned on?

Answer 18

Anti-Ice System - ON, will turn on both the engines, not the wings on ground

Question 19

MCDU TO Dataset OFF, ENG, and ALL

Answer 19

OFF when there is no visible moisture of ANY kind reported reported below 1700 AFE

ENG when there is visible moisture anywhere between 5 and 10 degrees reported below 1700 AFE

ALL when there is visible moisture anywhere below 5 degrees reported below 1700 AFE