Phenom 300 - Landing gear and brakes
Nosewheel steering system - The maximum possible steering angle is _____ plus or minus:
The maximum possible steering angle is plus or minus 43 degrees, using rudder pedal (20 degrees) in conjunction with asymmetric power and differential braking (23 degrees).
During brake operations, brake pads and disks are consumed and, when the wear pins are flush with the face A, the brakes need replacement. It is not necessary to set the Parking Brakes for an accurate wear pin reading.
The Parking Brakes must be set for an accurate wear pin reading.
An Initiated Built In Test (IBIT) commence when landing gear control lever signal transitions from up to down and at least one gear indicates down and locked, providing the weight on wheels signal indicates airborne and both wheels are stationary, considering a _____ delay to allow for peak hydraulic demands.
The IBIT exercises the pressure loop components throughout their full range in order to ensure correct operation of the SOV, BCV and PT. The process takes 5 seconds to be performed.
The emergency/parking brake has a pressure accumulator isolated from the hydraulic system by a check valve and a shut-off valve, which is open during engine start, when the airplane is on the ground and both Thrust Levers are in idle for more than _____.
The nose landing gear bay has two doors, mechanically linked to the NLG. The doors are open with the NLG extended, and closed with the NLG retracted. The NLG Main Fitting is linked directly to the left door, and through a torque tube to the right door.
The weight on wheel proximity switches are actuated by the airplane weight and provide to the other airplane systems the information whether the airplane is on the ground or in-flight. A disagreement between the signals from right and left WOW sensors for more than _____ will activate the CAS message "LG WOW SYS FAIL".
Landing Gear Aural Warning - Regardless of thrust lever position, airspeed and altitude, the landing gear aural warning cannot be silenced by pushing the WRN INHIB button for Flap lever at 2, 3 or FULL position.
It is true for Flap lever at 3 or FULL position
The locked wheel protection prevents the main landing gear tire from bursting due to wheel locking. The system logic compares wheel speed signals between the LH and RH brakes. If the system senses that a wheel speed is equal to or less than _____of the reference velocity, the brake control module detects a locked wheel condition and releases the brake pressure of slower wheel to zero, thus allowing speed equalization.
In case of hydraulic system failure, the emergency/parking brake is available and must be used carefully to stop the airplane.
Anti skid protection is not available for the emergency/parking brake system.
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Emergency/Parking brake system has two functions: first as the airplane parking brake and second as an emergency brake. It is operated through a T-handle located at the central pedestal of the cockpit. The T-handle is linked to the emergency/parking brake valve via:
The main brake consists of a brake-by-wire system controlled by either the pilot or copilot via rudder pedals. Rudder pedals actuate the pedal transducers that send the brake inputs to the Brake Control Unit (BCU), which controls both LH and RH brakes independently. Then, the BCU, which is connected to the _____, receives all brake interface signals and controls the shutoff valve (SOV) and both brake control valves (BCV's) for braking capability.
Nosewheel steering system - For towing or greater steering angles operation the torque link rods must be disconnected. With torque link disconnected the NLG wheel can rotate ____ degrees.
Landing gear operation - The landing gear control lever is equipped with an _____ interlock system that prevents the lever from being moved to the UP position when the airplane is on the ground.
In case of emergency, this lock may be overridden by pressing the DN LCK REL button on the LDG GEAR control panel.
Hydraulic pressure is available to the Brake Control Unit (BCU) through a brake shutoff valve (SOV), electronically controlled by the brake control valves (BCVs).
Hydraulic pressure is available to the BCV through a brake SOV, electronically controlled by the BCU. This SOV provides pressure only when the pedals are pressed, and the airplane is on the ground. It also provides pressure to the BCVs during the BCU built in tests. In case of failure or leakage in the main brake system, the SOV prevents this problem from affecting the other hydraulic consumers.
Touchdown protection prevents brake application prior to airplane on ground or spin up condition occurs. System functionality commands dump pressure when it is determined that the airplane is airborne, allowing the wheels to spin up at touchdown even if the pilot is pressing pedals in order to avoid tire blow out. Even before Weight on wheels (WOW) indicate airplane "on the ground", touchdown protection is cancelled when both wheel speeds exceed _____.
After WOW indicates airplane "on the ground" the spin up threshold is reduced linearly from 60 to 30 kt in 3 seconds. Also, touchdown protection is cancelled 3 seconds after WOW indicate airplane "on the ground" regardless of the wheel speed.
Emergency/parking brake accumulator pressure indication - The digital pressure is indicated in green, yellow and yellow-dashed. What is the meaning of a yellow-dashed indication?
The landing gear control lever is equipped with an hydraulic interlock system that prevents the lever from being moved to the UP position when the airplane is on the ground.
The landing gear control lever is equipped with an electric interlock system that prevents the lever from being moved to the UP position when the airplane is on the ground. In case of emergency, this lock may be overridden by pressing the DN LCK REL button on the LDG GEAR control panel.
The shimmy damper reduces the possible vibration between turning cylinder and main fitting (rotation movement), which may be induced during rolling on the ground. It is mounted on the Main Landing Gears (MLG) and the Nose Landing Gear (NLG).
It is part of the Nose Landing Gear (LG) only. The shimmy damper housing is connected to the main fitting and the axle is connected to the turning cylinder.
Emergency/parking brake accumulator pressure indication - If the value is invalid, the pointer:
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