Landing Gear Flashcards
Which of these supplies steering commands to the nose wheel steering (NWS) remote electronics unit?
A. Tiller input through the left flight control electronics (FCE) cabinet
B. Landing gear actuation and nose wheel steering function (LGA/NWS) in the common core system
C. Nose wheel steering partition in the brake system and steering unit
B. Landing gear actuation and nose wheel steering function (LGA/NWS) in the common core system
Which components monitor proximity sensors from the landing gear system and from airplane doors?
A. Common data network remote data concentrators
B. Proximity sensing data units left and right
C. Proximity sensing data concentrators
C. Proximity sensing data concentrators
Which of these does the landing gear actuation and nose wheel steering function in the common core system (CCS) use for sequence control of the landing gear and doors?
A. Position data from the control proximity sensors
B. Linear variable differential transformer (LVDT) data for sequencing valves
C. Pressure data from the related nose and main landing gear control valves modules
A. Position data from the control proximity sensors
A logbook report shows that it was necessary for the flight crew to use a override push-button to operate the landing gear lever for retraction. Which condition caused this?
A. Related circuit breaker from main battery is open
B. Landing gear actuation/nose wheel steering (LGA/NWS) control function reset data is not valid
C. Related remote power distribution unit (RPDU) failure
C. Related remote power distribution unit (RPDU) failure
Which of these is the source of hydraulic fluid for the alternate extend power pack?
A. A return line from the left hydraulic system reservoir
B. A stand pipe in the right hydraulic system reservoir
C. An oversize tube from the center hydraulic system reservoir
C. An oversize tube from the center hydraulic system reservoir
During ground operation, the nose landing gear (NLG) forward DOOR do not close when you operate the correct switch on P40. Which of these is the possible cause?
A. NLG door open control proximity sensors are out of rig
B. NLG DOOR safety valve module handle is in the SAFE position
C. Alternate extend NLG door release actuator is not released
B. NLG DOOR safety valve module handle is in the SAFE position
Which main landing gear door does not operate if there is a door actuator failure?
A. The trunnions door
B. The shock strut door
C. The body door
C. The body door
To do a brake deactivation, you must do which of the following?
A. Remove power and mechanical lock the position of the brake actuators
B. Disconnect the wire bundle assembly
C. Use the special function in the CMCF
C. Use the special function in the CMCF
A tail strike causes which of these indications?
A. An alert message on EICAS
B. A tail strike light on P40 to flash
C. A shear panel to mechanically fall away from the area of contact
A. An alert message on EICAS
Each main landing gear has how many axles and wheels?
A. 2 axles and 4 wheels
B. 3 axles and 6 wheels
C. 2 axles and 2 wheels
A. 2 axles and 4 wheels
During an air mode simulation test using a maintenance laptop with a wireless connection, the turned off. What is the most probable reason?
A. The strut compression sensor on the left MLG strut is faulty
B. The number 1 proximity sensing data concentrator (PSDC) has failed
C. A wireless connection cannot be used for this test
C. A wireless connection cannot be used for this test
Which components give air/ground data?
A. Wing beam stress sensors
B. Truck tilt and strut compression proximity sensors
C. Weight on wheels proximity sensors
B. Truck tilt and strut compression proximity sensors
What landing gear component gives hydraulic pressure to the extension/retraction?
A. Gear sequence bypass
B. Bypass/auto-off valve
C. Proximity system data concentrators
B. Bypass/auto-off valve
How do you test the nose wheel well door unsafe light?
A. Place the selector switch on the P56 panel to CLOSE CMD
B. Push the door unsafe test light switch on the P40 panel
C. Since the light has press-to-test capability, just push the light assembly
B. Push the door unsafe test light switch on the P40 panel
What control function gives command on the common data network (CDN) to operate the NLG and MLG bypass/auto off valve modules?
A. Hydraulic interface function (HYDIF)
B. Landing gear actuation/nose wheel steering (LGA/NWS) function
C. Landing gear retract function
B. Landing gear actuation/nose wheel steering (LGA/NWS) function
