Electrical

Question 1

R/TRU 1 belongs to which subsystem?

Answer 1

DC electrical subsystem

Question 2

How many AC generators are in the AC electrical subsystem?

Answer 2

2

Question 3

How many batteries (total) are in the Battery electrical subsystem?

Answer 3

2

Question 4

How many PCUs are required for the AH-64E configuration?

Answer 4

1

Question 5

Which components provide circuit protection, switching control logic, and secondary power distribution?

Answer 5

ELC 1 and 2

Question 6

The Solid State Power Controllers are internal to the _______?

Answer 6

PDP (Power Distribution Point)

Question 7

Under normal operations, which generator provides power to AC bus 1?

Answer 7

Generator 1

Question 8

At an 80% charge, how long can the emergency battery supply power to IMC/IFR equipment?

Answer 8

30 minutes

Question 9

What is the lowest temperature the internal primary battery heater will function at?

Answer 9

-40 degrees C

Question 10

Where is the emergency battery located?

Answer 10

6L160, next to the IFF Transponder

Question 11

Which CBP provides the emergency battery power for charging and heating?

Answer 11

4

Question 12

Which generator fault condition includes the following criteria: Out < 100 VAC > 200 +/- 50 milliseconds?

Answer 12

Undervoltage

Question 13

Which components drives the generators?

Answer 13

XMSN accessory gearbox

Question 14

What are the two positions of the generator reset switches on the CHK OVSP TEST panel?

Answer 14

ON, OFF/RESET

Question 15

Which R/TRU is located on the left side of the transmission bay?

Answer 15

R/TRU 1

Question 16

What is the VDC output of the R/TRUs?

Answer 16

28 +/- 0.5

Question 17

What temperature does the R/TRU thermal switch activate?

Answer 17

190 degrees F

Question 18

What component reports the status of R345 triggering a EUFD message?

Answer 18

External Power Sensing Switch

Question 19

What must be done to reset the External Power Contactor after an overcurrent condition?

Answer 19

MSTR IGN must be cycled to OFF

Question 20

What is the corrective action for the EXT PWR DOOR OPEN advisory?

Answer 20

Close the external power door

Question 21

What are the three steps for attempting to correct a single generator failure?

Answer 21

• Affected generator switch to OFF/RESET - Switch to ON
• Condition persists land as soon as practicable

Question 22

Loss of MPDs indicated what failure condition?

Answer 22

Dual R/TRU Failure

Question 23

Loss of MPDs indicates what failure condition?

Answer 23

Dual R/ TRU failure