Electrical and Hydraulic Systems Review

This set of flashcards covers key concepts of electrical and hydraulic systems, emergency procedures, and other critical components for an upcoming exam.

What is the function of the IDG in an electrical AC system?

The IDG (Integrated Drive Generator) provides electrical power for the aircraft's AC systems.

What does the EICAS message 'IDG 1(2) OIL' indicate?

It indicates a high oil temperature or low oil pressure in the respective IDG.

What is the minimum airspeed required to engage the AC Essential Bus?

150 KIAS.

How does the DC to AC inverter work?

It converts DC power to AC power and connects to the Standby AC Bus.

What are the functions of the batteries in the DC system?

They provide backup for the essential electrical system and supply power for 10 minutes without AC source.

What triggers a Batt Over Temp EICAS warning?

When the battery temperature exceeds 70˚C for at least 2 seconds.

What happens when the APU shuts down?

There is a 1-minute cooldown period during which AC power can still be used.

How is the TRU powered, and what does it do?

The TRU (Transformer Rectifier Unit) converts 115 VAC to 28 VDC and powers the DC buses.

What is the function of the SPDA in power distribution?

The SPDA (Secondary Power Distribution Assembly) distributes power to various aircraft systems.

What happens if the hydraulic system fails?

Hydraulic systems are independent and cannot transfer fluid between them.

What is the role of the fire protection system in an aircraft?

To detect and extinguish fires in engines and cargo compartments.

What components are involved in the Emergency Lights system?

Four ELPU batteries and various emergency lights around the cabin.

How does the fuel supply system work for the aircraft?

It includes integral fuel tanks, pumps, and valves to ensure a constant flow of fuel.

What protections does the Brake-By-Wire system provide?

Locked wheel protection, anti-skid protection, and automatic wheel braking.

What is the primary source of pneumatic power for engine start and anti-ice?

The engines and APU provide pneumatic power through bleed air.

What are the different modes of operation for oxygen systems on board?

Normal, 100% O2, and Emergency modes.

What limitations apply to flight control systems?

They include various operational constraints based on system failures and pilot inputs.

What happens if there is an aileron jam?

The opposite pilot retains control of the available aileron and multi-function spoilers.