Landing Gear

Question 1

What happens with an alternate gear extension?

Answer 1

DC ESS bus 3 powers the electric motor actuators to release the unlocks and allows free- fall of the gear.

Question 2

What is the alternate extension dormancy check?

Answer 2

After each 550 flt hours the system will do an alt ext to test circuitry. An ALTN GEAR DN advisory msg will display and when gear down and locked system goes back to normal ops.

Question 3

The gear warning cannot be muted if:

Answer 3

• gear not down and locked
• rad alt less then 1000agl
• more the 250 ft/min for 3 secs
• slat/flap set to ldg position
• one of: both thrust level angles set to approach with both Eng operative or one with opposite Eng inop.

Question 4

Landing gear aural warning can be silenced if all the following are met:

Answer 4

• gear not down and locked
• all rad alts broken
• both thrust levers set to approach
• slat/flap in landing position
• px alt below 15000ft

Question 5

What ar ethe steering reductions on the NWS?

Answer 5

GS less then 30kts: no reduction, up to 80° turn
GS 30-100kts: proportional reduction from 80-9°
GS >100kts- max reduction, limited to 9° either side

Question 6

What does the NWS system disconnect do?

Answer 6

Disconnects the system for towing up to 130°

Question 7

What does the rudder pedal disconnect do?

Answer 7

Allows for ground rudder checks.

Question 8

What three indications are sent to the status page regarding the tires?

Answer 8

Tire px, brake temp, brake wear data. Wear data only shown when less then 5% of wear remaining.

Question 9

What are the 5 types of braking system protection?

Answer 9

1. Anti-Skid - 204kts-10ths
2. Retraction braking - braking signal to all wheels for 5 seconds
3. Touchdown protection- prevents brake aviation in flight
4. Locked wheel protection - releasing brake of locked wheel when detected
5. Derogation - limits braking force until nose wheel touchdown

Question 10

What does alt brake mode do?

Answer 10

Allows use of proportional braking from toe brakes. No braking system protections.

Question 11

Below what GS is manual braking req regardless of auto brake position?

Answer 11

60kts

Question 12

How does the RTO position of the auto brake work?

Answer 12

Reject less then 70kts GS - decel rate 8ft/s2
Reject more or equal to 70kts GS - max decel