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19 Cards in this Set
- Front
- Back
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Which hyd system operates the landing gear system?
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A hydraulic system
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What prevents selcting the gear UP on the ground?
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The air/ground sensor actives a solenoid lock when in ground mode, which prevents the Landing Gear Lever from being positioned UP
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Explain how the Landing Gear transfer unit works.
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B hydraulic system pressure is available to help retract the landing gear if No. 1 engine RPM drops below 56% N2 and the gear lever is positioned UP
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By selecting OFF with the Landing Gear Lever, what occurs? How is the gear held up?
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By selcting OFF, hydraulic pressure is released from all landing gear hydraulic lines and actuators.
The gear is heard up by mechanical locks. |
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What stops the wheels rotating as they are retracted?
If a tyre is damaged on departure how is it prevented from causing further damage in the wheel well? |
The alternate brake system stops the main wheels from spinning during retraction. The nose gear wheels are stopper by snubbers in the wheel well.
If a damaged main tyre comes into contact with the fitting in the wheel well, the gear stops retracting and free falls to down/locked position. The affected gear is unable to be retracted until fitting replacement. |
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What does GREEN and RED gear light indicate?
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GREEN - indicates gear is down and locked
RED - indicates gear is not down and locked OR related landing gear is in disagreement with LANDING GEAR lever position |
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Which hydraulic system runs the Nose Wheel Steering? Which system runs the Alternate system?
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A hydraulic system normally operates the Nose Wheel Steering.
Alternate Nose Wheel Steering is run by B hydraulic system. |
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Which hydraulic system runs the normal Braking system? Which system runs the Alternate system?
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B hydraulic system runs the Noraml braking system.
A hydraulic system runs the Alternate Braking system |
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What protection is available with the antiskid system?
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Antiskid system provides:
- antiskid protection - locked wheel protection - touchdown protection - hydroplane protection |
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In what braking system (normal/alternate) is antiskid available? Is it available with loss of both hydraulic systems?
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It is available in both normal and alternate braking, even with loss of both hydraulic systems. (with use of accumulator pressure)
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What does the override trigger on the gear lever do?
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It overrides the landing gear lever lock.
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When is AUTOBRAKE available and armed?
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Autobrake is only available with NORAML braking.
It is armed when: - in flight - Autobrake selection of 1,2,3 or MAX |
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When is AUTOBRAKE applied (landing)?
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Autobrake is applied when thrust lever are IDLE and wheel spin up is achieved.
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Why does the AUTOBRAKE DISARM light illuminate for 1-2 secs with RTO selection?
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It is performing a self-test. If light remains illuminated a system fault has occurred.
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When is RTO mode activated?
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Both thrust levers retarded to IDLE and wheel spin speed of 90kts.
- If below 60kt: no braking or light - 60-90kts: no braking or light |
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In ALTERNATE braking what protection does ANTISKID provide?
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Only antiskid and hydroplane portection is available.
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What is difference between ANITSKID in normal braking and alternate braking?
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In alternate mode protections are reduced. Antiskid valves operate in 'pairs' of wheels instead of individual tyres.
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What position must the Landing Gear Lever be in for manual gear extension?
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Any position
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With manual gear extension door open, is gear retraction possible?
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No. Gear can only be retracted if door is closed.
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