MQF: 30mm Gun Operations

Question 1

All personnel aft of flight station (FS) 245 will wear ______ while the gun is configured for live fire.

Answer 1

Flight helmets

Question 2

AGs ______ not load more than ___ rounds into a single ammunition bin and associated feed chutes.

Answer 2

should; 270

Question 3

The GAU-23/A 30MM Gun can be installed or removed in three parts; what are the three parts?

Answer 3

Barrel assembly, feeder assembly, and receiver assembly

Question 4

The GAU-23/A 30MM Gun has four firing modes with a maximum firing rate of _____ rounds per minute.

Answer 4

200

Question 5

The GAU-23/A includes misfire detection to prevent ammunition with slow burning primers or charges from detonating in the dunnage corral. In this case, if the gun does not sense recoil, it will pause for ___________ before extracting the round.

Answer 5

0.7 seconds

Question 6

GAU-23/A: During the firing cycle of the gun, what position is the gun in when it is locked in sear and ready to start/repeat the firing cycle?

Answer 6

Sear

Question 7

GAU-23/A: During the firing cycle of the gun, what cycle is the gun in when the bolt is at the rear and the rotor is placing a round on the bolt face while simultaneously ejecting the previously fired round’s spent casing?

Answer 7

Feed

Question 8

GAU-23/A: During the firing cycle of the gun, what cycle is the gun in when the live round is chambered in the barrel?

Answer 8

Ram

Question 9

GAU-23/A: During the firing cycle of the gun, what cycle is the gun in when the bolt is locked and the firing pin is released?

Answer 9

Fire

Question 10

GAU-23/A: During the firing cycle of the gun, what happens when the gun is in DWELL?

Answer 10

Recoil, Counter recoil, and Hangfire delay

Question 11

GAU-23/A: During the firing cycle of the gun, what cycle is the gun in when the bolt is unlocked and removes round/spent casing from the chamber.

Answer 11

Extract

Question 12

When the Trainable Gun Mount (TGM) is in the Stow (Off) position it will not move with the sensor and should stow to _______.

Answer 12

0 degrees azimuth and -10 degrees elevation

Question 13

The tie-rod and azimuth pin must be ______ on the TGM for ______ flight.

Answer 13

Installed; pressurized

Question 14

Do not operate the TGM above________. Doing so may cause damage to the azimuth motor and inaccuracy of the gun.

Answer 14

200 KIAS

Question 15

Each Ammunition Handling System bin is capable of holding ______ linked 30mm rounds and each set of feed chutes is capable of holding approximately ____ linked 30mm rounds.

Answer 15

250; 50

Question 16

There are _______ encoders mounted on the TGM, _____ are installed on the elevation axis and _____ on the azimuth axis.

Answer 16

Three; two; one

Question 17

The Gun Power Cabinet (GPC) provides power to the ______.

Answer 17

GCU, MCU, and GCC

Question 18

The GPC contains eight power supplies, two battery chargers and four batteries, which can power the GWS independently of aircraft power for approximately ____________.

Answer 18

40 minutes

Question 19

Normal ranges for the ammeters located on the GPC are ______, readings above _____ indicate a problem.

Answer 19

0-47; 48

Question 20

Normal indication for the voltmeters on the GPC are ____________, indications below___________ may be observed if a battery requires charging.

Answer 20

24-29V DC; 24V DC

Question 21

The ______ receives data from the Fire Control System (FCS) in the ______ and subsequently sends azimuth and elevation commands to the motors for the TGM

Answer 21

Motor Control Unit (MCU); GCC

Question 22

The _____ starts and stops the gun drive system on command, monitors the gun action for safety and performance, and controls the ammunition feed selection hardware.

Answer 22

GCU

Question 23

There are two GWS modes of operation: ____ and _____. These are changed at the ______.

Answer 23

Tactical; Maintenance; GWS laptop

Question 24

In tactical mode the operators cannot complete a gun engagement.

Answer 24

False

Question 25

The aircraft will not be _____ if unable to install the _______.

Answer 25

Pressurized; tie-rod and azimuth pin

Question 26

Remain clear of _____outside the aircraft until confirming the ________.

Answer 26

Gun barrel range of motion; TGM motion switch is in the inhibit position

Question 27

During Initial Pre-flight, the 30mm gun is safe and clear after ensuring the following inspection items: ______.

Answer 27

TGM Motion – Inhibit
Manual Safe Handle – Safe
Bolt Face & Gun Feeder – Clear
BPI – Sear

Question 28

When manually cycling the gun during 30mm Gun pre-flight ensure the bolt travels freely and bolt position indicator corresponds to the correct position. Bolt should lock in SEAR and MISFIRE position. Ensure _______, selected __________ and selected ________ function properly.

Answer 28

Rotor; feed shaft stop; feed sprockets

Question 29

Ensure ___________ hole(s) is/are visible on the recoil indicator rod or damage to the gun may occur.

Answer 29

At least one

Question 30

Exterior Pre-flight: Notify maintenance if the barrel does not rotate ____________ in both directions, as this may prevent the gun from recoiling.

Answer 30

1/4 inch

Question 31

When the GAU-23/A gun feeder is removed, the _____________ should be placed in the ___________ position to prevent damage to the 14-pin connector should the feeder be inadvertently dropped.

Answer 31

Feeder handle; locked/ down

Question 32

Do not leave ____________ partially installed in receiver. Damage to receiver and guide rod may result.

Answer 32

Guide rod

Question 33

When timing the GAU-23/A 30mm gun feeder, cycle the feeder by pressing the timer release rod and rotating the ________.

Answer 33

Worm shaft nut counter-clockwise

Question 34

When timing the GAU-23/A 30mm gun the following condition(s) will be observed:

Answer 34

The rotor will rotate 1/3 of its travel and the selected feed sprocket will rotate one round position
The selected feed shaft stop will dis-engage as the sprocket rotates and will re-engage as the sprocket moves one round position
The BPI will cycle through one full rotation
The timer release rod and the selected feed shaft stop will engage within a ¼ turn (of the worm shaft nut) of each other.

Question 35

When timing the GAU-23/A 30MM gun feeder, if the feed shaft stop does not pop back in within ____________ of the _____________ popping out, hold the affected sprocket stationary with one hand while turning the worm shaft nut with the other hand.

Answer 35

1/4 turn; timer release rod

Question 36

When timing the GAU-23/A 30mm gun receiver the ______ and the _______ will be installed.

Answer 36

Track assembly; bolt and carrier assembly

Question 37

When conducting GAU-23/A 30MM Gun receiver timing procedures, do not leave receiver in the ________ position. Feeder may be damaged if installed with receiver in any position other than __________.

Answer 37

Misfire; Sear

Question 38

To release the bolt and carrier from the _______ and __________ positions press the ________ while rotating the Drive Shaft Handle counter-clockwise.

Answer 38

Sear; Misfire; Sear Release Solenoid

Question 39

During GAU-23/A 30mm gun receiver timing the bolt and carrier will lock in the _______ and ________ positions

Answer 39

Misfire; Sear

Question 40

The GAU-23/A 30mm gun feeder ________ be cycled at least __________ in each feed when accomplishing timing procedures.

Answer 40

Should; two times

Question 41

The ________ is used to forward rounds with the use of a _________ wrench.

Answer 41

Manual Drive Hub; 14 mm