Hydraulics

Question 1

LEFT SYSTEM

• Quantity –
• Low level alert –
• Reservoir pressurised –

Answer 1

LEFT SYSTEM

• Quantity – 1.0 gal
• Low level alert – 47%
• Reservoir pressurised – 55 psi

Question 2

RIGHT SYSTEM

• Quantity –
• Low level alert –
• Reservoir pressurised –

Answer 2

RIGHT SYSTEM

• Quantity – 1.6 gal (LDG demand)
• Low level alert – 30%
• Reservoir pressurised – 55 psi

Question 3

LEFT/RIGHT SYSTEM

• Normally quantity not more than –
• Max Temp –

Answer 3

LEFT/RIGHT SYSTEM

• Normally quantity not more than – 60% (read correctly when pressurised)
• Max Temp – 95°C

Question 4

ENGINE DRIVEN PUMPS (EDP)

• Pressure (No flow) –
• Pressure (Max Flow) –
• Flow rate –

Answer 4

ENGINE DRIVEN PUMPS (EDP)

• Pressure (No flow) – 3000 psi
• Pressure (Max Flow) – 2850 psi
• Flow rate – 11.4 gpm (5.3 gpm at idle)

Question 5

ELECTRIC MOTOR PUMP (EMP)

• Pressure –
• Flow rate –
• When armed, comes on when hydraulic pressure –
• On during takeoff until –

Answer 5

ELECTRIC MOTOR PUMP (EMP)

• Pressure – 2900 psi
• Flow rate – 1.7 gpm
• When armed, comes on when hydraulic pressure – < 1300 psi when either generator operational
• On during takeoff until – gears up or RTO is completed (need to manual recycle OFF)

Question 6

ELECTRIC MOTOR PUMP (EMP)

• Auto EMP inhibited (manual override) –
• Power source –
• Used for –

Answer 6

ELECTRIC MOTOR PUMP (EMP)

• Auto EMP inhibited (manual override) – >95 °C
• Power source – Main Bus
• Used for – Closing MED, DC Left EMP

Question 7

ACCUMULATOR

• No. of accumulators –
• Nitrogen pre-charge –
• No. of brake applications when fully charged (normal with anti-skid) –

Answer 7

ACCUMULATOR

• No. of accumulators – 2 (1 per wheel well)
• Nitrogen pre-charge – 700 psi
• No. of brake applications when fully charged (normal with anti-skid) - 6

Question 8

PARK BRAKE

• Charge using EMP when –

Answer 8

PARK BRAKE

• Charge using EMP when – < 1300psi

Question 9

EMERGENCY GEAR BOTTLE

• Nitrogen pre-charge –

Answer 9

EMERGENCY GEAR BOTTLE

• Nitrogen pre-charge – 2600 to 3000 psi

Question 10

LIMITATIONS

• EMP ops above 39000ft limited to –
• Max hydraulic temperature –
• Normal operation pressure –

Answer 10

LIMITATIONS

• EMP ops above 39000ft limited to – 10 mins
• Max hydraulic temperature – 95 °C
• Normal operation pressure – 2700 to 3250 psi (max 3500 psi)