Anti-Ice, Rain

Question 1

Recall when the use of engine anti-ice is required.

Answer 1

On the Ground –
• Engine anti-ice must be selected ON immediately after engine start and remain on during all ground operations when icing conditions exist or are anticipated.
• Icing conditions exist when the TAT is 10°C or below and any of the following conditions apply:
- Visible moisture defined as: Clouds, Fog with visibility less than one statute mile or 1600 meters, Rain,
Snow, Sleet or Ice crystals.
- Ice, Snow, Slush or Standing Water is present on the ramps, taxiways, or runways.
Note: Engine anti-ice is not required on the ground when the
temperature is below -40°C OAT

In Flight –

757 Operating Procedures
Operate engine A/I ON when in visible moisture and TAT is +10°C or below. No exceptions.

767 Operating Procedures
Engine anti-ice must be AUTO or ON during all flight operations when icing conditions exist or are anticipated, except during climb and cruise when the temperature is below -40°C SAT. Engine anti-ice must be AUTO or ON before, and during descent in all icing conditions, including temperatures below -40°C SAT. [AFM].

• When operating in areas of possible icing, activate engine anti– ice before entering icing conditions.
Note: Engine anti-ice must be in AUTO or ON before, and “during descent in all icing conditions”, even when temperatures are below -40°C SAT.

Question 2

Recall the conditions that require the use of the wing anti-ice.

Answer 2

All Aircraft.
• For aircraft with or without ice detectors installed, ice accumulation on the flight deck windshield frames, windshield center post, windshield wiper arm, or side windows can be used as an indication of airframe icing conditions.

CAUTION: Do not operate wing anti–ice when the total air temperature (TAT) is above 10°C.

Question 3

Recall when the probe heat operates.

Answer 3

When an engine is operating

Question 4

Describe the proper switch / selector positions for the ground and airborne use of the wing and engine anti-ice systems in icing and non-icing conditions.

Answer 4

• "IN" icing conditions:
“Switch” airplanes:
On the ground – WING off
 L/R ENG ON.
Airborne (After Take-off Flow)– WING ON or off as required
 L/R ENG ON.

“Selector” airplanes:
On the ground – WING OFF
 L/R ENG ON.
Airborne (After Take-off Flow) – WING AUTO.
 L/R ENG AUTO.

Note: “AUTO / AUTO / AUTO” accomplished on the After Take-off Flow
Note: Engine bleed air MUST be used for anti icing as the APU bleed air is insufficient. During single engine taxi, when engine anti-ice is required, operate one pack only.

• ”NOT IN" icing conditions:
“Switch” airplanes:
On the ground – WING off
 L/R ENG off.
Airborne – WING off.
 L/R ENG off.

“Selector” airplanes:
On the ground – WING OFF.
 L/R ENG AUTO.
Airborne(After Take-off Flow)
– WING AUTO.
 L/R ENG AUTO.
Note: “AUTO / AUTO / AUTO” should be selected on the after takeoff
flow.

Question 5

Know that only on _____________ equipped aircraft, EICAS advisory messages will appear as the ice detection system cycles, such as ICE DET ON and ICE DET OFF,

Answer 5

Switch

Question 6

Recall when wing anti-ice operation is inhibited.

Answer 6

On the ground.

Question 7

Recall which bleed air source (Engine or APU) of pneumatic air should be used for engine and wing anti-icing.

Answer 7

Engine bleed air must be used for all anti icing; APU bleed air is insufficient.

Question 8

Explain the meaning of an illuminated CAPT or FO PITOT light

Answer 8

Captain or FO Pitot (CAPT / FO PITOT) lights
• Illuminated (amber) –
-The aircraft is on the ground and neither engine is operating
Or
-The probe is not being heated

Question 9

Explain the meaning of an illuminated ICING light.

Answer 9

“Switch” airplanes.
ICING light
• Illuminated (amber) – the ice detecting sensor has detected ice.

“Selector” airplanes.
ICING light
• Illuminated (amber) – Engine / wing icing is detected and either engine or wing anti-ice is manually selected OFF or an anti-ice valve is closed.

Manually selected OFF with ice detected

An anti-ice valve is closed (failed) with ice detected

Question 10

Explain the meaning of an illuminated WINDOW HEAT INOP light.

Answer 10

Window Heat Inoperative (INOP) lights

• Illuminated (amber) – the window is not being heated.

Question 11

Explain the meaning of an illuminated ICE DET (ice detector) light (On 767 aircraft with anti-ice “Selectors”).

Answer 11

Ice Detector (ICE DET) light
• Illuminated (amber) – ice detector system is failed.
NOTE: This is because BOTH ice detectors have failed.

Question 12

Recall that “Selector” equipped aircraft with WING and L/R ENG selected to AUTO do not generate EICAS messages or discrete lights unless there is a system fault.

Answer 12

• In AUTO, an engine anti-ice fault is indicated by a discrete ICING light and a discrete L/R ENG VALVE light.

• The discrete ICING light will produce the Master CAUTION EICAS message ICING ENGINE.
• The discrete L/R ENG VALVE light will produce the ADVISORY EICAS message (L/R) ENG ANTI-ICE.

In AUTO, a wing anti-ice fault is indicated by a discrete ICING light and a discrete L/R WING VALVE light.

- The discrete ICING light will produce the ADVISORY EICAS  message ICING WING.
- The discrete L/R WING VALVE light will produce the ADVISORY  EICAS message L/R WING ANTI-ICE.

Question 13

Know that some aircraft _____________ have an ice detection system
(ICING light) installed.

Answer 13

Do not