The Landing Gear System Flashcards
What keeps the gear in the up position?
The gear are held up by hydraulic pressure.
How is the landing gear actuated? Describe the pump.
The gear are actuated by hydraulic pressure. Hydraulic pressure is provided by an electrically powered, reversible hydraulic pump.
What keeps the gear in the down position?
Down lock hooks keep the gear down, springs maintain pressure on the hooks to keep it locked until.
In what three situations will the landing gear horn activate?
- The gear in not locked down with the throttles positioned below 15” manifold pressure on one or both engines.
- The gear is not locked down with flaps set to 25* or 40*
- The gear handle is in the up position when on the ground (maintenance only)
What unit will not allow the gear to retract on the ground?
A squat switch on the left main gear. When on the ground, the switch prevents electrical current from reaching the hydraulic pump.
What is the procedure to manually extend the gear in an emergency?
After selecting gear down with the gear selector, pull the red emergency gear extension knob. This releases the hydraulic pressure and allows the gear to free fall down.
What airspeed is important during manual gear extension?
100 knots. Due to air load on the nose gear.
Are the brake and landing gear hydraulics connected?
No, the two systems are separate.
If you lose gear hydraulics, will you still have brakes?
Yes, the brake hydraulic system is separate from the gear.
What type of braking system is used by the Seminole? Where is the brake fluid serviced?
It has hydraulically actuated disk breaks with heavy duty disks.
The brake fluid reservoir is in the nose cone.
