Phenom 300 Landing Gear/ Brakes

Question 1

Describe the mechanism that locks the MLG and NLG in the down position.

Answer 1

MLG: Locking Ring internal to the actuator
NLG: Over-centered Spring Loaded Locking Stay mechanism

Question 2

What action unlocks the MLG and NLG during retraction?

Answer 2

MLG: Hydraulic pressure applied to the retract side of actuator.
NLG: Hydraulic pressure applied to the Downlock Release Actuator releasing the Locking Stay mechanism

Question 3

Describe the mechanism that locks the MLG and NLG in the up position

Answer 3

MLG: Hook attached to Uplock Box
NLG: Hook attached to Uplock Box

Question 4

What action unlocks the MLG and NLG during extension?

Answer 4

MLG: Hydraulic pressure applied to Uplock Box Release Actuator
NLG: Hydraulic pressure applied to Uplock Box Release Actuator

Question 5

What actions occur when the Gear Emergency Extension Handle is Pulled?

Answer 5

• Uplock Box Hooks are mechanically released
• Hydraulic fluid in all Landing Gear lines is opened to Hydraulic Return
• Landing Gear extends to the locked position through Gravity and Aerodynamic Force

Question 6

What criteria must be met to trigger the gear aural warning with the flaps in UP, 1, or 2 position?

Answer 6

At least 1 Landing Gear not down and ALL of the following:
- Altitude…..less than 700 LFE or AGL
- Airspeed…less than 160 KTS
- One Thrust Lever Angle less than 26* with the other less than 40* (AEO)
- Thrust Lever Angle less than 40* (OEI)

Question 7

What criteria must be met to trigger the gear aural warning with the flaps in 3 or FULL position?

Answer 7

At least one Landing Gear not down, regardless of Altitude, Airspeed, or Thrust Lever Angle.

Question 8

Under what conditions can the gear aural warning NOT be silenced?

Answer 8

Flaps in 3 or FULL position

Question 9

What type of Brake/Wheel protections are provided by the Brake Control Unit? (5)

Answer 9

• Antiskid Protection
• Locked Wheel Protection
• Touchdown Protection
• Retraction Braking
• Initiated Built in Test (IBIT)

Question 10

Is Antiskid protection available when using the Emergency Brake Handle?

Answer 10

NO

Question 11

Can the Emergency/Parking Brake accumulator be charged without system pressure?

Answer 11

NO

Question 12

How many parking brake applications are available with a full accumulator charge?

Answer 12

6

Question 13

What is the minimum required cooling period following an aborted takeoff or landing above the Quick Turn-Around Weight?

Answer 13

20 minutes

Question 14

Where can the brake cooling periods be found?

Answer 14

POH Vol 2 - Performance

Question 15

How do the brakes work on the Phenom 300?

Answer 15

• Rudder pedal brake pressure is applied and felt by a pedal transducer
• The Pedal transducer send this info to the BCU
• The BCU controls the BCV allowing hydraulic pressure to squeeze the brakes.