Electrical

Question 1

What kind of Electronic CB’s are located in the SPDAs

Answer 1

SSPCs or Solid State Power Controllers

Question 2

Where is the location of RAT GCU, AGCU, GCU 1&2

Answer 2

RAT GCU located near RAT, AGCU & GCU2 are in RICC and GCU1 is in LICC

Question 3

What is the name of Electrical Wiring that connects and integrates the ICCCs, SPDAs and MCDUs together

Answer 3

ARINC 429

Question 4

Does Electrical config of DU change after RAT has deployed

Answer 4

No, DU2 becomes PFD, Reversionary capability is lost, so no way of checking MFD for System & Status page

Question 5

Where does EICAS get its Battery Temp. Info from

Answer 5

MAU, which receives info from Temp Sensors inside the Batteries

Question 6

What monitors Electrical Power for the AC GPU on GRD

Answer 6

EPM or Electrical Power Module located in LICC

Question 7

How many slots do MAU 1,2 and 3 have

Answer 7

MAU 1 has 20

MAU 2 & 3 have 16

Question 8

What does NBPT (No-Break Power Transfer) achieve

Answer 8

Auto - Parallels Electrical Power from 2 sources to verify meeting necessary Electrical Requirements before taking 1-Generator Offline

Question 9

When does BATT 1(2) OVERTEMP EICAS Message come on

Answer 9

70*C for at least 2 seconds

Question 10

How many Cells do each Battery contain

Answer 10

19 Semi-Open NiCad Cells connected in a series by Copper Bus Bars

Question 11

Why is 3 Phase Power used over Single Phase

Answer 11

3 Phase Power is constant at every instance & the Avg. Power is 1.5 x the Max Power of 1 Phase.
2 Phase Power Avg. Power is equal to Max Power of 1 Phase
1 Phase Power Avg. Power is equal to .5 Max Power of 1 Phase

Question 12

What 3 Systems/Components have BITs

Answer 12

GCUs, AGCU, SPDAs

Question 13

What is located in FWD E-Bay

Answer 13

BATT 1, SPDA1, MAU 1 & 2, EICC, Static Inverter

Question 14

What are 3 types of BITs

Answer 14

Continuous Tests, Fault-Initiated Tests, Initiated Tests

Question 15

How many SPDAs are there and where are they

Answer 15

SPDA 1 - FWD E-Bay

SPDA 2 - MID E-Bay

Question 16

What is an example scenario you would manually deploy the RAT

Answer 16

1. Auto RAT doesn’t work

2. Dual Eng. failure (1. A/S 250kts or > & 2. RAT MAN Deploy

Question 17

What is Primary purpose of AC Generators

Answer 17

Provide Power to AC Buses and AC ESS Bus and those Power the 3 TRUs

Question 18

How many ways can AC GPU be turned ON

Answer 18

1. AC GPU Panel
2. Opp. FWD LAV
3. SWT Cockpit Overhead Panel

Question 19

What does DISC Position on the IDG do

Answer 19

Disconnects the IDG from the CSD. If this Fails it Mechanically shears off the CSD from the IDG

Question 20

List AC Power Components

Answer 20

1. 2 IDGs 115 VAC, 400 Hz, 40Kva
2. APU 115 VAC, 400 Hz, 40Kva
3. AC GPU 115VAC, 400Hz, 40Kva
4. RAT 115VAC, 400 Hz, 15Kva
5. Inverter 250VDC to 115VAC Direct to AC Standby Bus

Question 21

What does the BATTs backup

Answer 21

DC ESS Bus and AC Standby

Question 22

When does Static Inverter turn on

Answer 22

Whenever AC Power is lost to Power AC Standby Bus which powers Igniters 1A & 2A

Question 23

Where are Batteries located

Answer 23

BATT 1 - FWD E- Bay

BATT 2 - AFT E-Bay