HYD AND MLG

What automatically occurs to the electric motor pumps (EMP) if their temperature is too hot. Shut down automaticly. - HYD.P – Illuminates white PRESS light on P5 panel when RAT pump pressure reach 1450 psi. - 4, 2.

The RAT pumps supplies emergency hydraulic pressure to center system flight control surfaces, and the Pressure indication lights shows pressure data to. - HYD.P – Illuminates white PRESS light on P5 panel when RAT pump pressure reach 1450 psi. - MESC – Illuminates white PRESS light on P5 panel when RAT pump pressure reach 1450 psi. - HYD.P – Illuminates white PRESS light on P5 panel when RAT pump pressure reach 2300 psi.

The reservoir auto-bleed valve is usually cycled and the valve. On the ground the hydraulic interface function (HYDIF) open the valve when the function senses the pressure chamber for a minimum of four minutes and has a maximum of eight minutes between cycles. - On the ground the hydraulic interface function (HIF) close the valve when the function senses the pressure chamber for a minimum of four minutes and has a maximum of eight minutes between cycles. On the ground the hydraulic interface function (HIF) close the valve when the function senses the pressure chamber for a minimum of four minutes and has a maximum of eight minutes between cycles.

What is the purpose of the case drain filter module?. The case drain filter module for each hydraulic system removes contamination from the hydraulic fluid after it goes out of the pumps. It also supplies pressure and temperature signals to the hydraulic interface function (HYDIF). - The case drain filter module removes particles from the hydraulic fluid that cools and lubricates the L/H and R/H pump. - The case drain filter module remove particles from the hydraulic fluid that cools and lubricates the hydraulic fluid that cools and lubricates the L/H and R/H pump.

What is the primary method to measure the hydraulic quantity within the reservoir in the bootstrap reservoir. The primary method for measuring the hydraulic quantity within the reservoir is the Linear variable differential transformer (LVDT). The primary method for measuring the hydraulic quantity within the reservoir is the Rotary variable differential transformer (RVDT). The primary method for measuring the hydraulic quantity within the reservoir is the differential transformer (RVDT).

The B787 hydraulic system uses ___ engine driven pumps and ___ motor pumps. - 2, 4. - 4, 3. - 2, 2.

Where is the HYDYF function located?. IN THE CCR 1LH, CCR 4LH AND CCR 4RH. - 2 copies in the left CCR cabinet, 1 copy in the right CCR cabinet. - 1 copies in the left CCR cabinet, 1 copy in the right CCR cabinet.

What function controls the operation of the steering, nose landing gear, and alternate extend isolation valve. - LDG/NWS function. - All three of the mentioned isolation valves are under the control of HMGCP. - Mechanical control (NMP).

Make sure you have about ____ of fuel in the main tanks before you operate the EMPT. If you have less fuel, the pump is time limited. 720 kgs. 5750 kgs. 2000 kgs.

List the steps to retract the RAT?. Align the RAT red alignment arrows Pressurize the Center hydraulic system Put the ground test switch, on the P5 panel, to the ENABLE position Put the RAT stow switch to the ON position. Align the RAT blue and yellow alignment arrows Pressurize the Center hydraulic system Put the ground test switch, on the P5 panel, to the ENABLE position Put the RAT stow switch. Pressurize the Center hydraulic system Put the ground test switch, on the P5 panel, to the ENABLE position Put the RAT stow switch to the ON position.

Which conditions cause a FAULT light in the Hydraulic/RAT panel to come on?. • Low pump pressure, reservoir quantity low, reservoir air pressure low. • Low pump pressure, reservoir quantity low, reservoir air pressure low in the EDV position. • Low pump pressure, reservoir quantity low, reservoir air pressure low in the AUTO position.

During takeoff and landing, the ____ three may be on line. This is because three may be in demand from flight controls, thrust reversers, and speed brakes. Demand EMP pumps. Primary EMPs. Center EDPs.

. When the RAT is in the stowed position, what prevents ice in the generator?. Two internal heaters in the generator. One electrical heater in the generator. Not a critical hazard.

What are the 2 methods to deploy the ram air turbine. Automatic / Manual. RAM AIR TURBINE switch green UNLKD light illuminates, Sets the RAT UNLOCKED advisory message. RAM AIR TURBINE switch amber PRESS light illuminates, Sets the RAT UNLOCKED advisory message.

The left and right system EMPs are demand pumps: Controlled by selector switches on the P5 panel (ON/OFF/AUTO) - A FAULT illuminates for low pump pressure, overheat, or general fault. Controlled by selector switches on the P5 panel (ON/OFF/AUTO) - A FAULT illuminates for low pump pressure, overheat, or priority valve fail. Controlled by selector switches on the P5 panel (ON/OFF/AUTO) - A FAULT illuminates for low overheat, or isolation valve fail.

The hydraulic ground servicing system lets you fill the 3 hydraulic reservoirs from 1 location, exactly in. Right wheel well. Left wheel well. Forward wheel well.

1. The autobrake selector switch is in RTO. Automatically commands maximum brake force when the thrust levers are set to idle above 85 knots. Selects the desired deceleration rate with 1 being the lowest and MAX AUTO being the highest level of deceleration. Selects the desired deceleration rate with 1 being the highest and MAX AUTO being the lowest level of deceleration.

Which feedbacks does the nose Landing Gear Actuation/Nose Wheel Steering (LGA/NWS) software function use to calculate nose wheel steering position commands?. LANDING GEAR LEVER POSITION. CAPTAIN AND FIRST OFFICER TILLER POSITION AND RUDDER PEDAL POSITION. MLG AXLE RDCL.

When the BSCU control mode Engine run park-Active. The parking brake set and thrust lever is in idle. Brakes set to 100%. The parking brake release and thrust lever is above idle. Brakes set to 100%. c) The parking brake reléase and thrust lever is above idle. Brakes set to 50%.

4. A slow close solenoid in each MLG door safety valve module, causes that the MLG body doors close slower during ground operation:(. true. false.

The left and right brake system control units (BSCU) contain all of the control functions for brake OPERATION; THE AUTOBRAKE FUNCTION is put IN: __________________. AUTOBRAKE FUNCTION IN (RIGHT BSCU ONLY). AUTOBRAKE FUNCTION IN (LEFT AND RIGHT BSCU ONLY). AUTOBRAKE FUNCTION IN (LEFT BSCU ONLY.

6. The landing gear alternate extension system OPERATE IN DIFFERENT MODE(S), Select the correct answer. IN FLIGHT - RELEASES THE MAIN AND NOSE LANDING GEARS AND DOORS TO LET THE GEAR EXTEND BY GRAVITY. ON THE GROUND - OPENS AND CLOSES THE LANDING GEAR DOORS FOR MAINTENANCE ACCESS. BOTH ARE TRUE.

The control for sequence operation of the Main Landing and Nose landing Gear, doesn’t have. PROXIMITY SENSORS. HYDRAULIC SEQUENCE VALVES. AIR GROUND SENSOR.

8. Is acceptable that the Main Landing Gear (MLG), and Nose Landing Gear (NLG) Axle Remote Data Concentrators (ARDC) interchangeable. FALSE. TRUE.

How many Proximity Sensing data concentrators (PSDC ) are installed to monitor the landing gear system sensors. FIVE PROXIMITY SENSING DATA CONCENTRATORS. TWO PROXIMITY SENSING DATA CONCENTRATORS IN THE PASSENGER CABIN. FOUR PROXIMITY SENSING DATA CONCENTRATORS.

The red UNSAFE LIGHT in Each main gear is ON if these conditions occur together. a) RELATED MLG BODY DOOR IS CLOSED (SWITCH CONTACTS ARE CLOSED IN THIS CONDITION)- RELATED MLG DOOR SAFETY VALVE MODULE HANDLE IS IN THE STOW POSITION. b) RELATED MLG BODY DOOR IS NOT CLOSED (SWITCH CONTACTS ARE CLOSED IN THIS CONDITION)- RELATED MLG DOOR SAFETY VALVE MODULE HANDLE IS IN THE STOW POSITION AND NOT IN SAFE POSITION. c) RELATED MLG BODY DOOR IS OPEN (SWITCH CONTACTS ARE CLOSED IN THIS CONDITION)- RELATED MLG DOOR SAFETY VALVE MODULE HANDLE IS IN THE SAFE POSITION.

11. The MLG door safety valve module prevents , that the MLG doors closing with. a) ELECTRICAL POWER FOR RETRACT ON GROUND MAINTENANCE. b) HYDRAULIC PRESSURE FOR ALTERNATE RETRACTION. c) HYDRAULIC PRESSURE FOR GROUND MAINTENANCE.

12. The NLG aft doors_close when the NLG retracts. a) HYDRAULIC BY ACTUATOR. b) STRUCTURE HINGES. c) MECHANICALLY.

13. The Main Landing Gear (MLG) Door Control Valve Module, gives hyd pressure to open or close the MLG body doors in the next sequence. a) MLG DOOR ACTUATOR, MLG PRESSURE OPERATED VALVE. b) MLG DOOR UP LOCK ACTUATOR, MLG DOOR ACTUATOR, MLG PRESSURE OPERATED VALVE. c) MLG DOOR UPLOCK ACTUATOR, MLG PRESS OPERATED VALVE, MLG DOOR ACTUATOR.

14. Which brake system components, monitors Nose Landing Gear (NLG) tire pressure. a) THE MAIN LANDING GEAR (MLS) AXLE REMOTE DATA CONCENTRATORS (RDC). b) THE BRAKE POWER SUPPLY MODULE BPSU. c) THE NOSE LANDING GEAR (NLS) AXLE REMOTE DATA CONCENTRATORS (RDC).

15. The left and right brake system control units (BSCU) contain all of the control functions for brake operation. TRUE. FALSE.

16. There are 2 internal switches that control sequence operation of the parking brake. An internal solenoid Energizes to let the lever move freely- De-energizes to hold the lever in the up or down position. TRUE. FALSE.

17. After alternate landing gear extension, the landing gear doors remain in the Open position?(. FALSE. TRUE.

18. The Pressure to retraction and extensión components is through: a) Bypass/ MLG Truck positioner module, Transducer gives output position indication. b) MLG Control Valve Module, Transducer gives output pressure indication. c) MLG Door Control Valve Module, Transducer gives output control indication. d) Bypass/auto off valve module, Transducer gives output pressure indication.

19. Which brake system components supply mechanical force on the brake discs?. a) THE ELECTRIC BRAKE ACTUATORS (EBA. b) THE BRAKE POWER SUPPLY MODULE BPSU. c) LVDT SENSORS.

20. Which brake system components calculate wheel speed?. a) THE AXLE REMOTE DATA CONCENTRATORS (ARDC). b) NLGA / NWS CTRL. c) PROX SENS DATA CONCENTRATOR.

21. The Landing gear for operation receives the signal to control, from the_______________ across of the CDN. a) RDC/RPDU IN THE CAN BUS. b) LGA/NWS IN THE CCR. c) MLG ISOLATION VALVE IN THE TRUNNION.

22. The 787-8 takeoff, the LGA/NWS does not command the MLG doors to open until. a) The landing gear lever moves to the DN position. b) The Early Doors function. This causes the MLG doors to open without the landing gear control lever in the UP position. c) The landing gear lever moves to the UP position. d) the Early Doors function. This causes the MLG doors to open without the landing gear control lever in the DN position.

23. Each MLG body door opens and closes in normal operation by a ____________ in the wheel well. a) ELECTRICAL ACTUATOR. b) SOLENOID ACTUATOR. c) HYDRAULIC ACTUATOR.

24. Which brake system component controls brake system operation?(. a) FCE(FLIGHT CONTROL ELECTRONIC). b) THE BRAKE SYSTEM CONTROL UNIT (BSCU). c) EEC THRUST RESOLVER ANGLE L,R.

25. When in the MLG control valve module moves to the LDG gear up position, the actuators get pressure. This pulls the MLG to the retract position. When the MLG control valve module is in the down position, the actuators do not get pressure (the MLG falls by gravity).(. a) FALSE. b) TRUE.

26. The Main Landing Gear (MLG) truck stowed proximity sensors sense the stowed position of the related MLG truck. The landing gear actuation/nose wheel steering (LGA/NWS) control function uses this data to start the retraction sequence of the MLG. This makes sure that the MLG does not retract if the truck is NOT in the. a) STOWED POSITION. b) TILL POSITION (AFT WHEEL UP). c) RETRACT POSITION (FWD WHEEL UP).

27. When the Landing gear lever in the UP position, Both MLG struts up, and Both MLG doors closed. The The MLG bypass/auto-off valve module:(. a) de-energizes and removes hydraulic pressure from the MLG extension-retraction system after 6 seconds. b) energizes and removes hydraulic pressure from the MLG extension-retraction system after 10 seconds. c) de-energizes and removes hydraulic pressure from the MLG extension-retraction system after 10 seconds. d) energizes and removes hydraulic pressure from the MLG extension-retraction system after 6 seconds.