Landing Gear and Brakes

Question 1

Alternate Gear Extension Lever

Answer 1

• relieves hydraulic pressure in the landing gear lines and releases all landing gear uplocks
• landing gear extends in a free fall with the aid of gravitational and aerodynamic forces

Question 2

Components of Air Ground System

Answer 2

• 2 x Position Sensor Electronic Modules (PSEMs)

- 6 x WOW prox sensors (2 per wheel)

Question 3

How many landing gear doors?

Answer 3

Main Landing Gear: 3 doors per MLG

Nose Landing Gear: 4 doors (2 fwd and 2 rear)

Question 4

Landing Gear Normal Retraction/Extension

Answer 4

• gear position commanded by landing gear lever and controlled by SPDA
• hydraulic pressure releases up locks or down locks and pressurizes respective actuators

Question 5

Landing Gear Aural Warning logic

Answer 5

Landing Gear UP and:

• Flaps 5 or Full; or
• Flaps 0, 1, 2, 3, or 4
• Below 700 AGL
• Low TLA