Emergency Electric Power

Question 1

Emergency Gen powered via two methods:

Answer 1

-Big Green: One or both engine driven pumps power the Green system.
-Little Green: The RAT only powers the Green system. Depending on airspeed 15-45% of engine driven pump.

Question 2

Automatic activation of Emergency Elec Configuration:
Big Green:
Little Green:

Answer 2

Big Green:
-Loss of AC bus 1 and 2.
-Both Engine driven Gens trip offline.
Little Green:
-Loss of both engines
-Loose all engine Generators

Question 3

Big Green hydraulic powers the Emergency Gen:
Loss of AC Bus 1 and 2/ both engine Gens trip offline, Busses remaining and displays remaining:

Answer 3

-4 Busses remain powered:
- AC Essential
- AC Essential Shed
- DC Essential
- DC Essential Shed
Displays remaining:
- Captains PFD, ND, E/WD

Question 4

Little Green powers Emergency Generator, remaining busses:

Answer 4

• Little Green powered by RAT
• 2 Busses remain powered: AC Essential, DC Essential.
  Displays remaining:
  -Captains PFD, E/WD

Question 5

If the Emergency Gen is powered by the RAT. On Landing:

Answer 5

• Will disconnect when Slats are extended.
• Can be reactivated w/ MAN ON PB after Slats are retracted.
• Airspeed less than 140 kts RAT isn’t effective.
• Batteries are only power from them on.

Question 6

Land Recovery PB:
When A/C in Emergency Elec Configuration:

Answer 6

• Land Recovery AC and DC busses are shed.
  -Contain systems required for landing but not Cruise.
• Will remain shed even if normal Power is restored.

Question 7

Land Recovery PB recovers the land recovery AC and DC buses:

Answer 7

Restores systems required for landing:
-If Big Green:
- LGCIU 1
- SFCC 1
- BSCU CH 1
- LH Windshield heat
- LH Landing Light

Question 8

Land Recovery PB:
If Little Green powers Emergency Gen, systems powered:

Answer 8

Remaining:
- LGCIU 1
- SFCC 1 - Slat Channel only