Aircraft Survivability Equipment

Question 1

AN/APR-39B

Answer 1

Radar Warning System

Operates in the E, F, G, H, I, J and MMW bands

Question 2

AN/AAR-47

Answer 2

Missile/Lasser Warning System

Question 3

AN/ALE-47

Answer 3

Countermeasures Dispensing System

Question 4

Four conditions that will disable CMDS

Answer 4

1. CM/ARM PBA blank
2. Safety pin installed
3. WOG switch to ground
4. A detected open circuit breaker

Question 5

Four modes of operation for CMDS

Answer 5

1. Stand by mode
2. Manual programs
3. Semi automatic
4. Automatic

Question 6

In semi auto what switch do you depress in what direction to release CM

Answer 6

Collective Switch 2 Aft

Question 7

How to switch between M+Semi to M+Auto

Answer 7

Center press collective switch 2 when M+Semi or M+Auto are active.

Question 8

How to dispense manual programs 1 through 6

Answer 8

For 1 through 4 select the manual program at T5 and then press collective switch 2 forward to dispense.
For five push collective switch left, for six push the switch right.

Question 9

What does T6 SOURC R,M,B do

Answer 9

Cycle through what dispense the CM. Either the RWR the MLWS or Both

Question 10

Collective Switch 2 in Normal Mode

Answer 10

FWD- Manual program dispense 1-4
AFT- Semi-Auto Dispense
Left- Manual Program 5 Dispense
Right- Manual Program 6 Dispense
Center Press- Toggle Auto/Semi-Auto

Question 11

Collective Switch 2 in Bypass Mode

Answer 11

FWD- Chaff bypass program dispense
AFT- Flare bypass program dispense
Left- Both
Right- Mixed
Center Press- No Function

Question 12

PR-129

Answer 12

Chaff - aluminized glass dipoles precut to three lengths. 2.00”, 1.12”, .65” and has a quantity of 750,000, 750,000 and 2,250,000 respectively
Net weight = 134 grams
Covers 2-18Ghz with peaks at 2.853Ghz, 5.062Ghz and 9.294Ghz.

Question 13

MJU-32/B

Answer 13

Flare - replacement of the MJU-27A/B.
Third generation flare
Payload is chemical mixture of Magnesium, Teflon, and Viton (MTV) and is wrapped in an adheasive backed aluminum foil tape.
Black end cap

Question 14

MJU-38A/B

Answer 14

IR decoy flare. Replacement update to the MJU-38/B. Used for fixed wing

Question 15

MJU-49/B

Answer 15

Silver end cap
Is the in service Decoy device. Is covert day time and slightly overt night time. It is pyrophoric and not safe for launch from the forward launchers in the huey.
Has mental payload of hundreds of very thin metal foils stacked on top of each other, which have been chemically treated to be air reactive and produce IR energy.

Question 16

CCU-136A/A

Answer 16

Impulse Cartridge to eject CM from the ALE-47

Question 17

Program 1

Answer 17

Two MJU-49s on left and right

Question 18

Program 2

Answer 18

2xMJU-49 delay of y sec 2xMJU-49

Question 19

Program 3

Answer 19

2xMJU-49 delay of x sec 2xMJU-32

Question 20

Program 4

Answer 20

Program 3 twice with delay of y sec in between

Question 21

Program 5

Answer 21

2xRR-129 Reactive Chaff

Question 22

Program 6a

Answer 22

(2xMJU-49 delay of z sec) x 3

Question 23

Program 6b

Answer 23

(2xMJU-49 delay of z sec) x 6

Question 24

Program 6c

Answer 24

(2xMJU-49 delay of x sec 2xMJU-32 delay x sec)x3

Question 25

AAR-47 self bit test indications

Answer 25

Five xmas tress with boxes. the four in each quandrant represent each sensor and the one in the middle represents the processor. If one of these components are bad the box will flash.

Question 26

APR-39 self bit test indications

Answer 26

• Can take up to 43 seconds
• Top number will be 230.3 = OFP version
• Bottom number is the MDS version
• Next indications will be the specific AAA symbol top and bottom. If there are two top or bottom with one flashing, that sensor is faulty

Question 27

Flashing P?

Answer 27

Means the RSDS processor is faulty

Question 28

Flashing F?

Answer 28

If accompanied by a “APR-39 Failure” it is a non-specific failure and an IBIT test should be run on deck.
If accompanied by a “47 Signal Lost” the interface failed during one of the periodic self investigations and an IBIT test should be run once on deck.