Landing Gear Flashcards
How is the landing gear actuated and operated?
The landing gear handle is electric (electrically actuated) and the system is hydraulically operated
Where is the landing gear emergency handle located?
On the cockpit floor between the pilot seats.
What holds the landing gear in the UP position?
An uplock box on each gear
Explain the landing gear emergency extension process.
Pull out the free-fall handle that activates the free-fall selector valve and releases all residual hydraulic pressure from the landing gear lines to the return line, and mechanically releases the landing gear uplocks. Gravitational and aerodynamic forces extend the landing gear (the gear free fall). The downlock mechanism then locks the gear in its fully extended position.
When the flap lever is set to either 0, 1, or 2 position, when would the landing gear aural warning sound?
- Difference between pressure altitude & LFE is less than 700’, or radio altimeter indicates less than 700’ AGL; and
- Airspeed is below 160 kts; and
- Either thrust lever is set below 40 degrees for two operative engines; or thrust lever of operative engine is set below 40 degrees for a one-engine inoperative condition
When would the landing gear aural warning sound at the flap lever 3 position or FULL?
Regardless of thrust lever position, airspeed and altitude, the landing gear aural warning cannot be silenced by pushing the WRN INHIB button.
When would the landing gear aural warning sound if flaps failed?
The landing gear aural warning will sound when the difference between pressure altitude and LFE is less than 700’ while descending
What is the primary input to the “Air/Ground System”?
weight-on-wheels (WOW) switch
Name some of the aircraft systems that utilize the WOW signals:
Brake control system, landing gear control lever, FADEC, electrical system, lights (baggage compartment), air conditional and pressurization, fuel system (fuel indication), flight controls (flaps and spoilers); avionics (data concentrator unit and GEA)
What is the maximum turning rudder deflection?
Rudder pedals give up to 20 degrees of steering authority with another 23 degrees thru differential braking and thrust
What would a “LG WOW SYS FAIL” EICAS message indicate?
There is a disagreement between the signals from right and left WOW sensors for more than 3 seconds
How long does it take for the brakes to cool after a RTO?
20 minutes
What type of brake system does the Phenom 300 utiize?
Carbon brakes and brake-by-wire (rudder peddals actuate the pedal transducers that send the brake inputs to the brake control unit (BCU)).
The brake system includes what functions?
- Locked wheel protection
- Anti-skid protection
- Touchdown protection
- Gear retract braking
- Initiated Built In Test (IBIT)
What happens if the wheel speed input fails?
Anti-skid is not available
