146 Basic Systems

Question 1

What hydraulic system operates flaps?
What are any differences when a hydraulic system has failed?

Answer 1

Both Y + G operate flap, but if 1 is inoperative only 1/2 speed

Question 2

Finish the sentences:
Nose gear falls freely, main gear falls freely, however, _________ available.
Landing gear is ______ controlled and ______ activated.

Answer 2

Nose gear falls freely, main gear falls freely, however, hydraulic assistance is available.
Landing gear is electrically controlled and hydraulically activated.

Question 3

List fuel weights for the 146:
- Specific gravity
- Each wing
- Centre
- Aux

Answer 3

0.79 - Specific gravity
3683kg x2 - Each wing
1996kg - Centre
468kg - Aux

Question 4

Is it N1 or N2 that drives the fan and is the primary thrust parameter?

Answer 4

N1

Question 5

N1 is ______ pressure?
N2 is ______ pressure?

Answer 5

N1 Low Pressure
N2 High Pressure

Question 6

The APU drives what?
It supplies hot pressured air to what?

Answer 6

Electric generator
Air supply system

Question 7

How many generators are there and where are they located?

Answer 7

4

Gen 1 = Engine 1
Gen 4 = Engine 4
APU
Standby Generator = Hydraulic bay

Question 8

Standby generator is located where?
It provides what output?

Answer 8

Hydraulic bay

28 volt DC
+
3-phase AC 115/200 volts at 400Hz

Question 9

The standby inverter is a back up emergency power source for what?

Answer 9

Emergency AC

Question 10

The standby generator is driven by what?

It supplies 3-phase AC 115/200 400Hz and DC 28 Volts this is used as a backup power supply for what?

Answer 10

The Green Hydraulic System

Essential and Emergency Bus Bars

Question 11

If full electical failure occurs, the battery will power what?

Answer 11

Battery Bus - Emergency DC BUS - Standby Invertor - Emergency AC Bus

Question 12

Hydraulic System Yellow exclusively powers what?

Answer 12

• Inner lift spoilers
• Roll spoilers
• Flap wingtip brakes
• Standby fuel pumps
• Emergency Main Landing Gear lowering

Question 13

Hydraulic system green exlusivly powers what?

Answer 13

• Airbrakes
• Normal landing gear
• Steering
• The 2 Inboard lift spoilers
• Standby generator

Question 14

Systems powered by either hyrdaulic sytem are?

Answer 14

• rudder actuator
• flap (1/2 speed if one system failed)
• one set of main wheel brakes

Question 15

Two stages of flight idle are:
What two N2 speeds?
What conditions change the speed?

Answer 15

60%
67%

67% when engine anti-ice on. This will automatically decrease to 60% at rad alt 200/250 for landing