Landing Gear

Question 1

What is the maximum airspeed for extending the Gear?

Answer 1

165 Kts

Question 2

After landing, what braking limitations must the pilot comply with when applying the brakes?

Answer 2

35 knots ground speed

Question 3

When will the HARD LANDING caution segment illuminate?

Answer 3

When any of the landing gear struts experience a landing of at least 3 Gs. Set by micro switches in each landing gear that detects fracture of the shear fuse switch located at the top of the trunnion. It is also set if any of the sensor switches fail. (480-720 FPM (8-12 FPS) rate of descent)

Question 4

What is the maximum touchdown landing speed?

Answer 4

65 Knots Ground speed- Temporary restriction- 50 Knots ground speed

Question 5

What is the maximum touchdown landing speed?

Answer 5

65 Knots Ground speed- Temporary restriction- 50 Knots ground speed

Question 6

What provides the power to extend and retract the landing gear?

Answer 6

Hydraulic pressure from the Number 3 hydraulic system

Question 7

If the number 3 hydraulic system fails in flight, with the gear in the retracted position, can the pilot extend the landing gear for landing?

Answer 7

Yes. The system has a nitrogen blow down system for emergency gear extension

Question 8

What is the maximum forward speed to activate the landing gear emergency blow down system?

Answer 8

90 KIAS

Question 9

With a loss of the #1 and #2 converters and the Backup converter, can the landing gear be lowered?

Answer 9

With the DC Ess bus not powered, normal extension is not possible

Using the emergency blow down switch, powered by the Battery Bus, the gear can be lowered. (To power the Batt Bus the Back Up Converter switch must be moved to the off position

Question 10

How is the landing gear designed to absorb landing or hard landing energy?

Answer 10

Shock struts are an oleo pneumatic type designed to absorb energy during normal and emergency landings 2. A frangible tube absorbs energy from a hard landing.

Question 11

How is the landing gear held in the extended or retracted position?

Answer 11

The main landing gear is mechanically self locking in both the extended and retracted positions.

Question 12

How is the nose wheel of the tricycle landing gear controlled on the ground?

Answer 12

It is a castoring type nosewheel free to turn 360°. Nosewheel steering during taxi is achieved by differential braking and yaw thrust from the tail rotor

Question 13

What causes the landing gear warning “Too Low, Gear” aural alert and illumination of the LDG GEAR warning light?

Answer 13

Airspeed drops below 60 KIAS
Altitude is less than 150 ft agl (based on the rad alt)
Landing gear is retracted

Question 14

What systems are affected by the WOW switch’s?

Answer 14

TCAS
WX radar
AC under frequency protection in GCU
LDG retraction handle lockout
LDI test of #3 utility system
APU shutdown by ESU
Transponder
Enabling of #3 util gnd test hydraulic pump
Clock flight counter
AWG for Eng fail & Low rotor

Question 15

What electrical busses power the landing gear controls

Answer 15

DC essential bus
#1 DC Primary bus

Question 16

What effect does moving the landing gear handle have on the hydraulic system pressure?

Answer 16

It will ramp up the #3 Utility system from depressed to 3500-4200 psi

Question 17

What is the function of the brake system slave valve?

Answer 17

It directs the brake pressure from the master cylinder to the appropriate brake pad and will maintain isolation from the opposite master cylinder

Question 18

True or False
There is a self centering devise in the nose gear assembly that will center the nose gear from any position upon lift off to the hover?

Answer 18

False. If the Nose gear is 180° out alignment it will not centre and may jam when retracted