Block 6

Front 1

What is the rate of fire of the GAU-2?

Back 1

High rate is capable of 4000 rounds per minute and low rate is capable of 2000 rounds per minute rotor

Front 2

Rotor assembly

Back 2

The main component. Provides mounting point for removable tracks

Front 3

Gun housing assembly

Back 3

Has an elliptical cam path mild into it. The bolt has a place to ride(the bolt roller)

Front 4

6 Bolt assembly

Back 4

Transports rounds through the gun, has a firing pin

Front 5

6 removable

Back 5

Path for the bolt to move throughout the gun, and allows for bolt removal

Front 6

6 barrels

Back 6

Provides the path and has rifling

Locking flange- allows barrel to come out from rotor

Front 7

Barrel clamp

Back 7

Prevents the barrel from spreading out while shooting

Front 8

Safing sector

Back 8

Safs the gun

Front 9

Housing cover

Back 9

Covers the housing to access rotor for maintenance purposes

Front 10

Guide bar

Back 10

Guides the rounds in and out of gun from feeder

Front 11

Clutch and solenoid

Back 11

Allows for clearing gun

Front 12

Timing bracket

Back 12

Timing from clutch solenoid to rotor gears

Front 13

Cycle of operation for the GAU-2

Back 13

Feeding

Chambering

Locking

Firing

Unlocking

Extracting

Ejecting

Clearing

Front 14

What is the primary mission of the HH-60 aircraft?

Back 14

To conduct day or night personnel recovery operations into hostile environment during wartime

Front 15

A crew in the HH-60 aircraft usually consist of?

Back 15

Pilot

Copilot

And 2 special mission aviators

Front 16

How many weapon stations for a HH-60 have?

Back 16

Two(left/right) that can fire either .50 cal rounds and or 7.62mm rounds

Front 17

For HH-60 aircraft use extreme caution due to blade stoop because?

Back 17

The blade stoop can drop as low as four feet off the ground

Front 18

Why must you avoid the tail rotor on the HH-60?

Back 18

Because it is nearly invisible while running

Front 19

The Gun control unit(GCU)

Back 19

Applies power to the GAU-18 and GAU-2 both left and right stations

Front 20

Gun system control (GSC)

Back 20

2x3 position toggle switch (one for left and right stations)

Pilot/copilot consent

Provides power to forward and side guns

Front 21

Emergency master arm override switch

Back 21

Located on the flight engineer rack/ right hand ECU

Allows special mission Aviators to shut down weapons if consent is given

Front 22

Master arm switch

Back 22

Two position switch with red cover

Provides power to weapon system (on aircraft ,not guns)

Front 23

Maintenance bypass switch

Back 23

On the gunner’s panel

Requires copper safety wire to prevent tampering during maintenance

Front 24

EMI filter safety pin

Back 24

Breaks electrical circuit to countermeasure stations

Front 25

GAU-2 safety bar

Back 25

Prevents barrels gun from rotating

Front 26

Circuit breakers

Back 26

Pulled during loading and unloading countermeasure operations

Front 27

Verify the following for safety devices

Back 27

AFT chaff

Chaff dispenser continuity

Forward flare

Aft flare

Front 28

Gun systems consist of what?

Back 28

The GAU-2 and the GAU-18

Front 29

What does EGMS stand for?

Back 29

External gun mounting system

Front 30

Tow plate

Back 30

Assembly provides a mounting point for the Pintle block

Front 31

Pintle block

Back 31

Attaches to the aircraft tow plate

Front 32

Pintle arm

Back 32

Mounts to the aircraft at the Pintle block

Front 33

Pintle post

Back 33

Provides an azimuth field of fire for the weapon and mounts to the Pintle arm

Front 34

Azimuth

Back 34

When talking about a gun it is left or right movement

Front 35

Mounting arm GAU-2c

Back 35

Supports mini gun at yoke assembly

Contains stops that provide depression elevation and azimuth field of fire

Elevation strut which can be used to lock weapon in fixed forward fire

Front 36

Yoke assembly GAU-2c

Back 36

Attached mini gun to mounting arm to provide depression and elevation

Front 37

Yoke assembly GAU-18A

Back 37

Attached cradle assembly to the Pintle post

Front 38

Cradle assembly GAU 18 A

Back 38

Supports and attaches the GAU 18A to the EGMS

Front 39

Shock absorber assembly GAU-18A

Back 39

Provides recoil load reduction and stability during firing

Front 40

GAU 2C

Back 40

Electronically driven air cooled multi barrel machine gun

2 modes of operation side and forward

Side fire operated by gunner or flight engineer at 2000-4000 shots per minute

Forward fire operated by pilot at 2000 SPM

Front 41

Feeder/delinker

Back 41

Delinks the rounds and feeds the rounds into the GAU-2

Front 42

AC electrical drive motor

Back 42

Propels then action into the weapon by driving the rotor and feeder(electrically drives the gun)

Front 43

Gun control unit

Back 43

Mounted between the hand grips

Contains the arm switch

HI rate= 4000spm LO rate= 2000spm trigger switches

Front 44

Ammunition feed chute

Back 44

Guides ammo from booster motor to the feeder delinker

Front 45

GAU-18A is what?

Back 45

An Air cooled recoil operated, belt fed machine gun

Front 46

GAU 18A has how many shots per minute?

Back 46

750-850

Front 47

GAU-18A is side operated by who?

Back 47

By gunner or flight engineer

Front 48

GAU -18A forward fire operated by who?

Back 48

The pilot

Front 49

Firing solenoid

Back 49

Attached to the buffer tube and activated the trigger bar

Front 50

Grip assembly

Back 50

Mounts to the aft and of the cradle and contains the trigger switch for firing

Front 51

Ammunition feed chute

Back 51

Guides ammo from the magazine and booster motor to the weapon

Front 52

Link ejection Chute

Back 52

Directs expended links into the spent brass chute

Front 53

Spent brass shoot

Back 53

Directs spent links and brass over board

Front 54

Ammunition and handling systems

Back 54

GAU-2C -2700 7.62mm rounds ammunition magazine

GAU-18/A- 600 .50 cal rounds ammunition magazine

Front 55

Electronic control unit

Back 55

Provide power and controls the gun stations

Front 56

What is located at the FE rack under the gunners rack?

Back 56

Electronic control unit

Front 57

What contains the emergency master arm override switch?

Back 57

The electronic control unit

Front 58

What allows control for gunner/FE in the event of GSC damage malfunction

Back 58

The electronic control unit

Front 59

Where is the master arm switch located?

Back 59

Gun system control

Front 60

What kind of stations select switches are there on the Gun system controls?

Back 60

Left and right station select switches are FWD SAFE SIDE

Front 61

When performing gun safing procedures depending on the gun configuration it is configured with?

Back 61

With a housing cover and a top cover safing blade

Front 62

What is the main warning you should have before performing maintenance?

Back 62

Verify that there are no live rounds in the gun by removing safing sector or top cover safing blade assembly from gun visually inspecting each barrel for live rounds. Failure to do so may result in injury or death to personnel.

Front 63

Drive motor assy removal

Back 63

Remove three bolts and washers securing gun drive motor assy then remove gun drive motor assy

Front 64

Drive motor assy installation

Back 64

Install electric drive assy on gun and secure 3 bolts and washers. Torque bolts to 80-85 inch lbs and upon completion perform functional checkout and analysis WP 008 00

Front 65

GAU2 inspections

Back 65

TO contains minimal requirements

Organizations may develop additional requirements

Front 66

GAU2 inspection requirements

Back 66

Look for dirt rust corrosion as well as WP 006 00.

Worn stripped or damaged threads on threaded parts, nicks, dents, cracks break, or warped mating surfaces in the gear, crack ,chipped, broken, worn, broken or bent pins or other visual signs

Front 67

GAU2 repair

Back 67

Blend burrs, nicks scratches and gouges smoothly into surrounding surfaces using fine stone, severely chipped pitted or brinelled parts are not repairable, unserviceable assemblies

Front 68

Cleaning and lubricating GAU2

Back 68

Apply moderate coding of TW 25b to all surfaces of the gun drive assembly

Front 69

Do you lubricate the electrical solenoid?

Back 69

No

Front 70

Removal of feeder delinker

Back 70

Remove quick release pin securing feeder delinker

Handle carefully to avoid dropping parts into the gun

Lift up and slightly aft to remove feeder delinker

Front 71

Inspection requirements for the Dillon feeder

Back 71

Every 10000 rounds, local conditions may require more frequent inspections

Front 72

Common discrepancies for inspection include?

Back 72

Burrs, nicks, gouges, scratches, cracked welds, minor damage interfering with gun fuction. Pitting on nonfunctional exterior surfaces is permissible

Front 73

Repair components that?

Back 73

Do not meet the criteria of table 1 WP 006 00

And perform the feeder/delinker operation check in WP 008 00

Front 74

Lubricate feeder delinker

Back 74

Apply TW-25B to all areas conditional . Rotate delinker feeder manually to ensure all parts have been lubricated

Front 75

Installation of feeder delinker

Back 75

Install to mini gun,secure with quick release pin, install spent brass chute and ammunition feed chute onto feeder delinker

Front 76

Description of GAU-18

Back 76

Recoil operated

Fires from closed bold position

Front 77

Barrel and barrel extension assy on the GAU 18

Back 77

Combines barrel, barrel extension, breech bolt, and recoil buffer

Front 78

Back plate assy on GAU18

Back 78

Installed at the rear in of the receiver and is used to aim and fire weapon

Front 79

Rod assembly in GAU18

Back 79

Provides counter recoil to return to breech bolt into the battery position

Front 80

Breech bolt assy GAU18

Back 80

Guides and fires ammunition

Front 81

Recoil buffer assy GAU 18

Back 81

Absorbs recoil

Front 82

Cover assy GAU18

Back 82

Used to guide feed and strip linked ammunition, cover for all components in the receiver

Front 83

Retraction slide assy GAU18

Back 83

Used to charge the weapon

Front 84

Receiver Assy and barrel jacket assy

Back 84

Supports and protects the barrel. The receiver also serves as a housing and supports for various assemblies of the weapon

Front 85

Cycle of operation for the GAU18

Back 85

Firing the first round

Recoiling

Extracting

Cocking

Ejecting the round

Counter recoil

Feeding he round

Automatic firing of subsequent rounds

Front 86

Firing the first round in the GAU18

Back 86

Firing pin strikes the primer

Front 87

Recoiling in the GAU18

Back 87

Starts at the instance of firing

Front 88

Extracting the round in the GAU18

Back 88

Removal of fired expanded rounds

Front 89

Counter recoil in the GAU18

Back 89

Bolt barrel and barrel extension are forced in the forward battery position

Front 90

Feeding the round in the GAU-18

Back 90

The stripping and chambering of the next linked round

Front 91

Automatic firing of subsequent rounds GAU18

Back 91

As long as the trigger is depressed and subsequent rounds are present

Front 92

GAU-18 barrel jacket flash suppressor

Back 92

Perform gun safety and clearance procedures

Front 93

11w1 -13-2-132 TO is used for what?

Back 93

The GAU18 barrel jacket and flash suppressor

Front 94

Disassembly of the GAU18 barrel jacket/flash suppressor

Back 94

Remove flash suppressor - remove two screws and unscrew flash suppressor from barrel jacket

Remove barrel jacket - remove barrel lock screws- unscrew barrel from trunnion using barrel jacket removal tool

Front 95

Inspection for GAU18 barrel jacket and flash suppressor

Back 95

Inspected by dyepenetrant every 10000 IAW TO 33B-1-2

Inspect both items IAW table 5-2. Check for cracks, bullets impact after firing,inspect for bent prangs, ensure locking screws

Front 96

Cleaning a flash suppressor and barrel jacket

Back 96

Should be cleaned with rifle bore cleaner(RBC). If not available can use hot water and solution

Front 97

Lubrication of both flash suppressor and barrel jacket

Back 97

VVL-800 or lubricant cleaner and preservation (CLP)

Front 98

What is MIL PRF 63460 used for?

Back 98

Lubrication and corrosion prevention

Front 99

Installation of both flash suppressor and barrel jacket

Back 99

Screw barrel jacket

Stake two screws