MD 80 Ice Protection

How many Pilot Tubes has the MD-80 and where are located?

(1) Rat Probe (2) Stall Warning Transducers (2) Alternate Static Ports (2) Static Ports Rudder Travel Limit

Where is locate the RAT Probe?

(right side of fuselage)

Which windows are power by the Windshield Ant-fog?

* Windshield Anti-fog is provided to all cockpit windows except the aft windows. R and L Side Windshield and Center Windshield Eyebrow Windows Clear view Window

Which windows are power by the Windshield Ant-ice Only?

* Windshield Anti-ice is provided to the three forward windshields. R and L Side Windshield and Center Windshield. They have more impact

Due to the natural flexing of the wing during rotation, ice on top of the wing..........

.........can break free and be ingested by the engines, which forms a particular hazard for the MD-80.

If the Wing Heat switch is inadvertently place to ON before removal of frozen wing contamination (de-icing not completed)

...there is a possibility that run-off and refreezing in the flap track area can occur.In this case, the flap track areas behind the heating blankets must be carefully inspected after de-icing is completed to ensure that all ice has been removed

LIMITATIONS: When operating in icing conditions, When the Tail must be De-iced?

1) at least every 20 minutes 2) one minute before selection of the Landing Flaps 3) before shutting off the Airfoil Anti-ice system.

What stage(s) of bleed air is used for engine anti-ice? ____________________.

8th and 13 Th

Is the PITOT/STALL HEAT OFF come on when a RAT or static heat port fail?

A failure of heat to the Static ports or RAT probe will not cause this light to come on.

On the MD 80, When ice can form on the upper surface on the ground. no ice condition

After the aircraft has been refueled. The ice formation on the upper wing occurs when supercooled fuel in the main tanks moves inward and upward during the refueling process

What we need to know about the Pressure Regulator and Shutoff Valve (PRSOV)

Air from the Pneumatic system enters the Airfoil Anti-ice system through the Pressure Regulator and Shutoff Valve (PRSOV). The PRSOV acts as a shutoff valve when closed and when open - restricts the supply pressure to no more than 22 psi. With a loss of electrical power, the PRSOV fails to the closed position. In addition to an electrical signal, at least 20 psi. is required for operation of this valve.

What is use the Airfoil in flight?

Airfoil Anti-ice is used inflight to keep the leading edge of the wings and horizontal stabilizer free of ice.In addition, the Airfoil Anti-ice system provides bleed air heating to the fuselage strakes and the Ram Air Scoop.

AIRFOIL ICE PROTECTION OPERATION

Airfoil icing conditions can exist when ram air temperature is below 6°C (42°F) and there is visible moisture in the air.

What is the relationship between ENGINE VALVE and ENG ANTI ICE ON?

An amber ENGINE VALVE annunciator light illuminates when the position of at least one valve disagrees with the selection of the control switch. A blue ENG ANTI-ICE ON light illuminates when at least one valve is open on the respective engine. Normally when the switch is moved ON or OFF, the ENGINE VALVE light comes on momentarily and then goes out. This light should not remain on continuously.

If Airfoil Anti-ice operates when Engine Anti-ice is off: TRP will NO-MODE . Yes or no and WHY?

Because, after turning the system switch to OFF, do not turn off the Engine Anti-ice until the 2.5 minutes of Tail De-ice has elapsed and the Airfoil System has shutdown.

Which component is electrically anti-iced by an emergency bus? _____________________.

Captain Pilot Heat

ENGINE ANTI-ICE IN FLIGHT

Engine anti-ice should be used during flight when ram air temperature is less than 6°C (42°F) and visible moisture is present or if ice buildup occurs on windshield wipers or edges of windshields.

ENGINE ANTI-ICE ON GROUND

Engine anti-ice should be used during ground operation if outside air temperature is less than 6°C (42°F) and visible moisture is present or dewpoint and outside air temperature (RAT or SAT) are within 3°C (5°F) of each other.

When the The amber ICE FOD ALERT light illuminates?

If one or more of the wing heaters are below the acceptable temperature to ensure the critical area is free of ice. Therefore, depending on conditions, the illumination of this light after landing or initial power up may be common for up to 30 minutes until the wing is warmed by the heaters. Note: If the light remains on for more than 30 minutes, there is likely a system fault.

How can we calculate the penalty of the TRI for Climb and Cruise when the TRI is inoperative?

If the TRI (MD-81/82) is inoperative, the penalties and thrust limits will have to be derived from charts in your Flight Manual.

If the ENGINE VALVE illuminate which of the three valve is not property positioned?

If this light remains illuminated, the crew does not know which valve is not properly positioned, but only that Engine Anti-ice is not operating normally

How many items are monitor in the METER SEL &HEAT?

It monitors the operation of only the PITOT Tube and STALL Vane heaters. Only the first six items on the selector are monitored.The light is illuminated when the switch is selected OFF - or in any other position - if one of the six monitored items is not heated.A failure of heat to the Static ports or RAT probe will not cause this light to come on.

Heater Control UnitsHCU's in flight

It would not be normal for any lights to be illuminated in flight, although the switch normally remains in the ON position.

What is a Stall vanes used for? and How many are in the Md80?

Left and right Stall Vanes are electrically heated. * These vanes provide an angle of attack input to the Digital Flight Guidance System and to the Supplementary Stall Recognition System. * The vanes are heated to ensure that they have freedom of movement throughout the flight.

Can the Airfoil Anti-ice system operate on the ground? ______.

NO

The AIRFOIL system can provide Anti-ice protection to the wings and the tail at the same time?

NO. The Wing and Tail Valves always operate out of phase. When one valve is open the other should be closed. This feature provides Wing Anti-ice or Tail De-ice - but not both modes at the same time.

The Left Augmentation Valve is _____________ sensitive when the "single switch" Airfoil Anti-ice is turned on and the left Pneumatic Crossfeed Valve is closed.

NOT Temperature

If the blue ENG ANTI CE IS ON light means that the engine ant ice is normal condition?

No necessary.The illumination of the blue light does not guarantee normal operation but merely that at least one of the three valves is open. The ENG ANTI-ICE light should be on and the ENGINE VALVE light out when the system is operating normally.

Are there EPR penalties for the takeoff or go-around modes as climb and cruise?

No. There are no EPR penalties for the takeoff or go-around modes. Only for Climb and Cruise.

Some aircraft have two Airfoil Anti-ice control switches What are the differences?

On these aircraft - movement of either switch to the ON position - when inflight - will cause the system to operate.There are no automatic timers with this control panel. * The Tail De-ice Mode must be manually engaged according to the 3 requirements set forth in Limitations. * The augmentation valves are temperature sensitive when the respective switch is ON and are not controlled by the position of the pneumatic crossfeed valve levers.

Tail De-ice must be operated in icing conditions: at least once every 20 minutes, before turning off the system, and _____________ ?

One minute prior to extension of the landing flaps

Which items are monitored by the PITOT/STALL HEAT OFF light? _______________________.

Only the Pitot Tube and Stalls vanes heater

What happen when the TAIL button is pressed?

Pressing the TAIL button will activate the 2.5 minute timer that powers the Wing Valve closed and the Tail Valve open. The WING ANTI-ICE light will go out and the TAIL DE-ICE light will come on. At the end of 2.5 minutes, the TAIL DE-ICE light should go out and the WING ANTI-ICE light should come on.

What is the power source for the Engine Anti-ice Valves? __________________________.

Respective AC Power.

Which system requires that the Pneumatic Crossfeed Valve be closed to turn off the temperature sensitive signal from the respective Augmentation Valve?

Single switch

LIMITATIONS: When operating in icing conditions, When the Tail must be cycled?

Tail Deice is to be cycled after each icing encounter. The Tail mode is cycled before start of approach just before gear down

The Left Augmentation Valve is ____________ sensitive when the left switch of the "two switch" Airfoil Anti-ice is turned on and the left Pneumatic Crossfeed Valve is closed.

Temperature.

The Augmentation Valves are _____________ sensitive when Airfoil Anti-ice is operating?

Temperature. With the Single Switch Airfoil system, the Augmentation Valves receive the Temperature signal if the Airfoil system is on and the respective Pneumatic Crossfeed Valve is open. Therefore, on the Single Switch system, if a Pneumatic Crossfeed Lever is closed, the respective Augmentation Valve does not receive a signal to become Temperature Sensitive. In this case the respective Augmentation Valve remains in the Pressure mode (if the switch is in AUTO)

What is indicated by the illuminated ENGINE VALVE annunciator lights? __________________.

That at least one engine Anti-Ice Valve position disagrees with the switch position.

What is the Augmentation valves and what is used for? What do we need to know?

The 13th stage Augmentation Valves can operate in a Pressure Sensitive or Temperature Sensitive mode. The Pressure Sensitive mode operates when the Air Conditioning switch is in the AUTO position - to ensure an adequate pressure is supplied to the Air Cycle Machine The Augmentation Valves operate in the Temperature Sensitive mode when the Airfoil Anti-ice system is operating to ensure an adequate temperature of air is supplied.The Augmentation Valves are signalled to operate in the Temperature Sensitive mode when the Airfoil System switch is ON and the respective Pneumatic Crossfeed Lever is open.Therefore - if a Pneumatic Crossfeed valve is open, the air from the respective engine is available for anti-icing, and the Augmentation Valve of that engine is Temp. Sensitive.

The 13th stage bleed air is delivered to the ___________________________ - where the air provides heat as it flows around the _____________. After the 13th stage air flows through the ___________ - it departs through an opening in the bottom of the ____________.

The 13th stage bleed air is delivered to the hollow engine cowling - where the air provides heat as it flows around the cowling. After the 13th stage air flows through the cowling - it departs through an opening in the bottom of the cowling - and exhausts overboard.

AIRFOIL ICE PROT PRESS ABNORMAL

The AIRFOIL ICE PROT PRESS ABNORMAL annunciator light alerts the crew when bleed air is not flowing to the intended locations of the aircraft. The light will illuminate under various abnormal conditions - but basically informs the crew that the system is not operating as desired. Since the light monitors system pressure at various locations, it has a 15 second delay timer that allows the system to stabilize before this light will come on

The Airfoil Anti-ice system can be operated on the ground?

The Airfoil Anti-ice system can only operate when the aircraft is in flight.

The Airfoil Anti-ice system utilizes bleed air from the Pneumatic system to heat the _________,________,_____________ and leading edges of the ________________________.

The Airfoil Anti-ice system utilizes bleed air from the Pneumatic system to heat the Strakes, Slats, Ram Scoop, and leading edges of the Horizontal Stabilizer.

What is heated by the Airfoil Anti-ice system?

The Airfoil Anti-ice system utilizes engine bleed air from the pneumatic system to heat the Fuselage Strakes, Slats, Ram Scoop, and leading edges of the Horizontal Stabilizer.

What systems are heated by Engine bleed air?

The Airfoil and Engine Anti-ice systems are heated by engine bleed air

The Augmentation Valves operate in the ________________________________mode when the Airfoil Anti-ice system is operating to ensure an adequate temperature of air is supplied. The Augmentation Valves are signalled to operate in the ________________ Sensitive mode when the Airfoil System switch is _____ and the respective Pneumatic __________________ Lever is open. Therefore - if a Pneumatic _______________ valve is open, the air from the respective engine is available for anti-icing, and the Augmentation Valve of that engine is ___________. Sensitive.

The Augmentation Valves operate in the Temperature Sensitive mode when the Airfoil Anti-ice system is operating to ensure an adequate temperature of air is supplied. The Augmentation Valves are signalled to operate in the Temperature Sensitive mode when the Airfoil System switch is ON and the respective Pneumatic Crossfeed Lever is open. Therefore - if a Pneumatic Crossfeed valve is open, the air from the respective engine is available for anti-icing, and the Augmentation Valve of that engine is Temp. Sensitive.

How can you monitor the condition of that DC Emergency bus Though the METER SEL & HEAT switch?

The Captain's Pitot Heat is powered by the Emergency DC Bus, therefore the switch is carried in the CAPT position to monitor the condition of that bus.

What The Engine Anti-ice system utilizes to heat the Bullet, Inlet Guide Vanes, and Cowling

The Engine Anti-ice system utilizes engine bleed air to heat the Bullet, Inlet Guide Vanes, and Cowling

The Engine Ice Protection is provided by______________________stage

The Engine Ice Protection is provided by 8th and 13th stage bleed air..

Is the METER SEL & HEAT is in OFF position which annunciator light should become on?

The PITOT/STALL HEAT OFF annunciator light should be light ON. The light is illuminated when the switch is selected OFF - or in any other position - if one of the six monitored items is not heated.

What RAT is provided?

The RAT Probe provides a temperature input to the Digital Flight Guidance System, Flight Recorder, Thrust Rating Indicator, and (if installed) the SAT indicator.

Which probe is not heat on the ground?

The Ram Air Temperature Probe (RAT Probe) is not heated on the ground. The Ground Shift system shuts off the electrical current when on the ground.The probe is not heated on the ground, so as to not effect the temperature display.

When the The amber ICE FOD INOP Illuminate?

The amber ICE FOD INOP light illuminates if an anomaly exists in the wing heater system.

What components are heated for normal flight operation

The electrically heated sensors and static ports are shown on this frame

Which are the four pitot tubes that are electrically heated?

The four pitot tubes that are electrically heated consist of the three on the nose that provide input to the Flight Instruments and Flight Recorder, 1. F/O's Pitot 2. Aux. Pitot 3. Captain's Pitot and the tube on the Vertical Stabilizer that provides airspeed information to the Rudder Restriction system. Rudder Limiter Pitot

Heater Control UnitsHCU's limitations

The heaters are powered by the Left Gen Bus.The system requires about 12 kw of power and can be powered by External Power, Engine Generator Power, or the APU.Note: the system will not operate if the AC Crosstie Relay is closed. After landing the system is inhibited for 20 seconds.This is because the high electrical load could cause undesired surges in the electrical system during an Autoland operation. The pilot indication that the system is operating is the blue WING HEAT ON annunciator light.This light will normally be illuminated while the aircraft is on the ground, however the light is inhibited when either throttle is set for takeoff. the system enters a 2.5 minute test cycle when WING HEAT ON

The hot air is delivered to the _________________ - flows through each ___________ and exhausts through an opening on the bottom of the strake

The hot air is delivered to the Fuselage Strakes - flows through each strake and exhausts through an opening on the bottom of the strake

The hot air is delivered to the left and right wing Slats through a ______________________. These ducts allow the slats to be heated in any position.The air is directed behind the entire slat surface and exhausts below and behind the slats into the atmosphere

The hot air is delivered to the left and right wing Slats through a telescopic duct. These ducts allow the slats to be heated in any position.The air is directed behind the entire slat surface and exhausts below and behind the slats into the atmosphere

The one 13th stage valve allows air to deliver to the ____________________________

The one 13th stage valve allows air to deliver to the engine Cowling

In which scenario The ICE PROT TEMP LOW would illuminate?

The respective High Temperature sensor will activate an annunciator light when the supplied air temperature is too high for Airfoil Anti-ice operations. If this light comes on, the Abnormal Procedure will direct the crew to take steps to attempt to reduce the supplied air temperature. This usually results in closing the respective Crossfeed Valve. It is normal for the TEMP LOW lights to come on momentarily until the bleed air has heated the sensors.

In which scenario The ICE PROT TEMP LOW would illuminate?

The respective Low Temperature sensor will activate an annunciator light when the supplied air temperature is too low for Airfoil Anti-ice operations. If this light comes on, the crew will first ensure that the Crossfeed Lever is open and then ensure that engine thrust is adequate to supply hot air.

If during the Receiving Checklist to verify the operation of all items RAT is not working what should be the problem?

The switch is rotated clockwise during the Receiving Checklist to verify the operation of all items.The loadmeter should display a load for all items except the RAT Probe. (Rat is only operate in flight)

The AIRFOIL ICE system can operate in either the ________ or _______ mode.A blue annunciator light informs the crew of which mode is operating at a given time.

The system can operate in either the WING or TAIL mode.A blue annunciator light informs the crew of which mode is operating at a given time.

The AIRFOIL ICE PROTECT system will automatically cycle to the Tail mode every __________ minutes while the system is ON. To manually engage the Tail mode, press the TAIL button. The Tail mode operates for _____ minutes and will cycle to the Wing mode after 2.5 minutes. Movement of the AIRFOIL switch to OFF will engage the Tail mode for 2.5 minutes. After completion of the ________ mode, the system will shut down.

The system will automatically cycle to the Tail mode every 15 minutes while the system is ON. To manually engage the Tail mode, press the TAIL button.The Tail mode operates for 2.5 minutes and will cycle to the Wing mode after 2.5 minutes. Movement of the AIRFOIL switch to OFF will engage the Tail mode for 2.5 minutes. After completion of the Tail mode, the system will shut down.

The two 8th stage valves allow air to deliver to the ____________________________________.

The two 8th stage valves allow air to deliver to the Inlet Guide Vanes and Bullet.

How many AC powered valves are on the engine ice protection?

There are three AC powered valves on each engine that control the delivery of hot air.

Heater Control UnitsHCU's on the ground

There are two identical systems, one for each wing. Each system has a controller, necessary wiring, and a very thin composite electrothermal heater blanket that is bonded to each wing. The pilot interface consists of a control switch, a blue annunciator light and two amber lights. On the ground it may be normal for the WING HEAT ON and ICE FOD ALERT lights to be on, but it is not normal for the ICE FOD INOP light to come on.

What are two modes of Airfoil Anti-ice operation?

There are two modes of Airfoil Anti-ice operation. The Wing Anti-ice mode heats the strakes, slats, and Ram Scoop. The Tail De-ice mode heats the Ram Scoop, and leading edges of the Horizontal Stabilizer.

Where is located the High and Low temperature sensor?

There is a High and Low temperature sensor located just inside each Pneumatic Crossfeed Valve.

Pressure Regulator and Shutoff Valve senso needs to know

There is a pressure sensor located downstream from the Pressure Regulator and Shutoff Valve.This sensor activates the SUPPLY PRESS HIGH annunciator light if the PRSOV is allowing more than 23 psi. into the Airfoil Anti-ice system.

There is one switch to activate the Engine Anti-ice for each engine. When a switch is moved to ON, the _________________ are powered _________. When the switch is moved to OFF, the _____________ are powered ___________. With a loss of electrical power, the valves remain in _________________________

There is one switch to activate the Engine Anti-ice for each engine. When a switch is moved to ON, the three valves are powered open. When the switch is moved to OFF, the three valves are powered closed. With a loss of electrical power, the valves remain in the last position

Ice Protection is provided for various sensors and the windshields by electrical power.T/F

True

Do I need one, both, or none of the Pneumatic Crossfeed Valves open when I turn ON the AIRFOIL switch ?

We need at least one. Although both Pneumatic Crossfeed Valves are normally opened to supply bleed air to the Airfoil Anti-ice Pressure Regulator and Shutoff Valve, the system will operate with only one Crossfeed open - provided enough bleed air is available from that engine.

Can we use the engine Ant ice and Airfoil at the same time in the flight?

When Airfoil Anti-ice is turned ON, Engine Anti-ice must also be turned ON.

When Engine Anti-ice is turned ON, the _______________________________will automatically calculate and display any necessary EPR penalties for ___________________________.

When Engine Anti-ice is turned ON, the Thrust Rating Indicator will automatically calculate and display any necessary EPR penalties for climb and cruise.

When the switch METER SEL & HEAT is moved from the OFF position what should be happen?

When the switch is moved from the OFF position, the annunciator light should go out and all items should be heated (except the RAT Probe on the ground).

What does the AIRFOIL switch when is pressed in ON position?

When the switch is turned ON, air can be delivered from the Pneumatic System to the Airfoil heated components Open the Pressure Regulator and Shutoff Valve (PRSV) with initially the Wing Valve.....them after 15 minutes open the tail valve

Is Windshield is and an Anti-Ice or de-ice

Windshield anti-ice

The TAIL DE-ICE mode is also activated automatically when the System switch is moved from ON to OFF?

Yes. Therefore, selecting OFF does not immediately shutoff the system, but engages the TAIL DE-ICE mode - followed by a shutoff 2.5 minutes later

Is the Ram Scoop heated in both the Wing and Tail modes of operation?

Yes. the Ram Scoop is heated in both the Wing and Tail modes of operation.