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Atlas 767 > Landing Gear > Flashcards

Landing Gear Flashcards

1
Q

Vlo/Vle

A

270 / .78M whichever is less. (ALTN 250/.75)

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2
Q

When is the Landing Gear inhibited from retraction?

A
  • On the Ground.

- Tilt Issue.

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3
Q

How is the LG Powered?

A

Extension, Retraction, Steering - Center Hydraulic System.
Normal/Auto Brakes - R HYD.
ALT Brakes - C HYD.
Anti-Skid - R or C HYD

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4
Q

What uses Nose Air / Ground Sensing Signals?

A
  • Stall Warning System inhibits

- Master Caution and Warning Inhibits

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5
Q

AIR/GND SYS light

NOSE A/G SYS light

A
  • No Takeoff.

- FAULT. Some portion of the A/G Sensing System has failed, and affected systems will not function properly.

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6
Q

What holds the LG up?

A
  • Nose - HYD PRESS.

- Main Gear - Doors.

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7
Q

What happens if LG does not retract?

A
  • GEAR Light will indicate immediately.
  • EICAS and Horn are delayed 25 second for transit.
  • DOOR Light will remain illuminated.
  • Gear Down Light will remain illuminated if appropriate.
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8
Q

Describe Extension.

A
  • Lever in Down Position.
  • GEAR and DOOR Lights illuminate.
  • Hydraulically actuated DOWN.
  • Hydraulically closed doors.
  • Lights go out.
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9
Q

How will you know if the LG is not down and locked?

A
  • Extinguished Green gear down light.
  • Illuminated Amber GEAR light.
  • EICAS messages.
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10
Q

Describe an alternate extension.

A
  • Electric motor trips locking mechanism for each gear.
  • Seleting DN on the ALTN GEAR EXTEND switch releases all unlocks and doors.
  • Gravity to down and locked.
  • DOORS remain open, and lights remain ON.
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11
Q

How much steering authority do you have?

A
  • 65 Degrees L or R with the Tiller, 7 with the peddles.
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12
Q

What does the break system include?

A
  • Normal Brake Hydraulic System. (R HYD Sys.)
  • Alternate Brake Hydraulic System. (C HYD Sys.)
  • Brake Accumulator.
  • Antiskid.
  • Autobrake.
  • Parking Brake.
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13
Q

When does the Alternate Brake System Activate?

A
  • Automatically, when the R HYD System Pressure is low.
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14
Q

What does Normal Braking include?

A
  • Autobrakes.

- Wheel for wheel antiskid.

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15
Q

What does the Brake Pressure Dial measure?

A
  • Accumulator pressure, and indirectly, R HYD System and Normal Brake Pressure.
  • Should be above amber.
  • Should allow for several brake applications.
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16
Q

What does the Alternate Brake System include?

A
  • Alternate Metering Valves.
  • Alternate antiskid valves (axel for axel).
  • No Autobrake.
17
Q

How does antiskid work?

A

Controllers compare wheel/axel speed in relation to IRS GS, and release pressure into a relief line, as appropriate.

18
Q

Describe Autobrakes.

A
  • Normal is 2.
  • If Autoland, 3 or more.
  • If Braking action less than good, 4 or Max.
  • System is designed to produce a RATE OF DECELERATION.
  • Deactivates when Manual Brake force is applied, Selected OFF, Thrust applied, or for a FAULT. (Speedbrakes?)
19
Q

What are the relative application of braking actions by different systems?

A
  • RTO - full application of all 3000 psi.
  • MAX Auto is pretty stiff.
  • Max Manual depends, but definitely less than RTO.
20
Q

When will a BRK SOURCE light illuminate? What Happens?

A
  • R HYD and ALTN Brakes (C HYD Low Press) FAIL.
  • ISLN Valve Automatically Closes.
  • Press RSRV BRK and STEERING provides fluid and activates the C1 HYD Pump.
  • BRAKE SOURCE Light should extinguish.
  • If not, you’re down to the accumulator (still has antiskid)
21
Q

When is RTO Armed?

A

Above 85 kts. (Automatic when thrust levers are retarded to Idle above 85 kts.)

22
Q

Describe Autobrake Landing Operation.

A
  • Activates when the wheels have spun up and both thrust levers are retarded to idle.
  • 5 deceleration rates.
  • Autobrake level can be changed without disarming the system.
  • Autobrake pressure reduced to maintain chosen rate when/if other systems (reversers and spoilers) are deployed.
23
Q

Auto brake disarm.

A
  1. Manual Pedal brake application.
  2. Either thrust lever advanced.
  3. Spoiler lever moved from full up position.
  4. Selected OFF/Disarm.
  5. Autobrake Fault.
  6. Antiskid Fault.

Atlas 767 (14 decks)

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