Landing Gear And Brakes Flashcards
What happens if 2 WOW sensors fail on the same gear
On ground?
In flight?
Lg lever will not move up and
Lg no dispatch caution msg will display
In flight the lg lever will be stuck down and
Lg WOW sys fail caution msg
How many weight on wheels (WOW)
Sensors Are there
2 on each gear
What does the electrical override system do
It bypasses the PSEM and extends the gear the same way as normal operation
How does the alternate extension work
Pull up on the lever, that releases all hydraulic pressure in the lines and opens all gear up locks,
The gear will then free fall into position
When of you use the down lock release button
Only in event of landing gear control lever failure
Or if needed to clear obstacles in an emergency
When will gear aural warning sound and not be able to be silenced
Slat flap 5 or full
Slat flap lever in 0,1,2,3,4 and
RA below 700
TLA below 45° (2 engine)
TLA below 59° ( single engine)
Dual RA failure with flaps slats 5 or full
What powers the outboard brakes
Hyd sys 1
What powers the inboard brakes
Hyd sys 2
What does the BCM ( brake control module) provide
Locked wheel protection
Anti skid protection
Automatic wheel braking
Touchdown protection
What is locked wheel protection
System compares wheel speeds or pairs( outboard. Or inboard pairs)
Must be above 30 kts.
If one pair is 33% or below of it’s paired wheel, Hyd pressure on that brake is dropped to zero
Below what speed is anti skid protection deactivated
10 kts
What is automatic wheel braking
Prevents gear from spinning during retraction
What is touchdown protection
Prevents plane from landing with main gear brakes applied
It is deactivated 3 seconds after WOW and when wheel speed above 50 kts
Which Hyd sys powers the emergency brake
1 and 2
How many brake applications will emergency brake allow
6
