Electrical Flashcards
What kind of Electronic CB’s are located in the SPDAs
SSPCs or Solid State Power Controllers
Where is the location of RAT GCU, AGCU, GCU 1&2
RAT GCU located near RAT, AGCU & GCU2 are in RICC and GCU1 is in LICC
What is the name of Electrical Wiring that connects and integrates the ICCCs, SPDAs and MCDUs together
ARINC 429
Does Electrical config of DU change after RAT has deployed
No, DU2 becomes PFD, Reversionary capability is lost, so no way of checking MFD for System & Status page
Where does EICAS get its Battery Temp. Info from
MAU, which receives info from Temp Sensors inside the Batteries
What monitors Electrical Power for the AC GPU on GRD
EPM or Electrical Power Module located in LICC
How many slots do MAU 1,2 and 3 have
MAU 1 has 20
MAU 2 & 3 have 16
What does NBPT (No-Break Power Transfer) achieve
Auto - Parallels Electrical Power from 2 sources to verify meeting necessary Electrical Requirements before taking 1-Generator Offline
When does BATT 1(2) OVERTEMP EICAS Message come on
70*C for at least 2 seconds
How many Cells do each Battery contain
19 Semi-Open NiCad Cells connected in a series by Copper Bus Bars
Why is 3 Phase Power used over Single Phase
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
What 3 Systems/Components have BITs
GCUs, AGCU, SPDAs
What is located in FWD E-Bay
BATT 1, SPDA1, MAU 1 & 2, EICC, Static Inverter
What are 3 types of BITs
Continuous Tests, Fault-Initiated Tests, Initiated Tests
How many SPDAs are there and where are they
SPDA 1 - FWD E-Bay
SPDA 2 - MID E-Bay
What is an example scenario you would manually deploy the RAT
- Auto RAT doesn’t work
2. Dual Eng. failure (1. A/S 250kts or > & 2. RAT MAN Deploy
What is Primary purpose of AC Generators
Provide Power to AC Buses and AC ESS Bus and those Power the 3 TRUs
How many ways can AC GPU be turned ON
- AC GPU Panel
- Opp. FWD LAV
- SWT Cockpit Overhead Panel
What does DISC Position on the IDG do
Disconnects the IDG from the CSD. If this Fails it Mechanically shears off the CSD from the IDG
List AC Power Components
- 2 IDGs 115 VAC, 400 Hz, 40Kva
- APU 115 VAC, 400 Hz, 40Kva
- AC GPU 115VAC, 400Hz, 40Kva
- RAT 115VAC, 400 Hz, 15Kva
- Inverter 250VDC to 115VAC Direct to AC Standby Bus
What does the BATTs backup
DC ESS Bus and AC Standby
When does Static Inverter turn on
Whenever AC Power is lost to Power AC Standby Bus which powers Igniters 1A & 2A
Where are Batteries located
BATT 1 - FWD E- Bay
BATT 2 - AFT E-Bay
