GBUs

GBUGENERAL INFORMATION

100

What does the acronym GBU stand for?

Guided

Bomb

Unit

200

What are GBUs?

General Purpose bombs modified to detect a target illuminated by a laser beam.

_{GBU-10 | GBU-12 | GBU-16}

300

What are your Paveway III bombs?

GBU-24^series

BLU-109/BLU-116^series (HTP)^{Hard Target Penetrator} bombs converted to GBUs.

_{Fuze | AFG | FZU Generator | Adapter group | Guidance Control Unit}

400

Which GBUs use Low Collateral bombs?

GBU-51^series and GBU-52^series are BLU-126 LOCO bombs modified to detect targets illuminated by a laser beam.

500

What are JDAM GBUs?

Joint Direct Attack Munitions

MK-80^series/BLU-100^series bombs modified with GPS guidance sets^(KMUs).

_{GBU-31 series | GBU-32 series | GBU-38 series | GBU-54 series}

GBUPUBLICATIONFAMILARIZATION

100

Publication for GBUs?

NAVAIR 11-140-10

(GBUs & JDAMs)

200

What is Section II of the GBU Pub?

Description

_{Explains each component and provides a picture}

300

What is Section III in the GBU Pub?

Configuration

_{Breaks down the configuration of each weapon by component.}

400

What is Section IV of the GBU Pub?

BIT/TEST and Reprogramming

500

What is Section XX of the GBU Pub?

GBU-54 Series with MK-122 Safety Switch

_{Weapons Assembly/Disassembly}

GBU CONFIGURATIONS

100

What components make up a GBU?

Bomb Body^{(MK-80/BLU-100 series)}

CCG^{(MAU-169 series)}

AFG^{(MXU-600 series)}

FUZE^(FMU-139)

200

What fuze can be used as an alternate for GBU-24s?

FMU-143 ^series

300

What components make up a GBU-10?

MK84/BLU-117

MAU-169 (CCG)

MXU-651 (AFG)

MK-122

FMU-139

400

What components make up a GBU-12?

MK82/BLU-111

MAU-169 (CCG)

MXU-650 (AFG)

MK-122

FMU-139

500

What components make up a GBU-16?

MK-83/BLU-110

MAU-169 (CCG)

MXU-667 (AFG)

MK-122

FMU-139

GBUBIT/TEST and REPROGRAMMING

100

What does the acronym BIT stand for?

What does the acronym I-BIT stand for?

Built-In-Test

Initiated-Built-In-Test

200

What Test Program Set is used to perform automatic software reprogramming of GBUs?

AN/GYQ-79A (CMBRE+)

300

How many boxes of components does the CMBRE+ have? 

The AN/GYQ-79A is composed of 3 boxes.

_{Test Adapter Unit (Box 1)}

_{Controller Unit (Box 2)}

_{Accessory Kit (Box 3)}

400

What is required AFTER each CMBRE+ power-up, PRIOR to testing the GBU or guidance set?

W23 cable self-test.

_{Self-test is automatically initiated after each AN/GYQ-79A power-up or when test cable is changed from W6 to W23.}

500

What happens when guidance sets fail BIT?

Guidance Sets rejected as a result of failures during testing and/or reprogramming operations shall be reported for disposition...

_{This information may be requested on a case by case basis to support Conventional Ordnance Deficiency Report (CODR) investigations}

GBU-54ASSEMBLY/DISSASSEMBLY

100

What fuze and sensor is used on the nose and tail of a GBU-54^series weapon?

Nose: DSU-38^series

Tail: FMU-139^series

200

What KMU^series (Guidance) is used when configuring a GBU-54^series weapon?

KMU-572^series

300

During a post assembly inspection of a GBU-54^series weapon, what should be the configuration of the fins? 

Fins should be in an "X" configuration.

400

When using a DSU-38^series in a GBU-54^series weapon, what must also be used?

When DSU-38^series is used, FZU-48 must be used. 

DSU-38^series is not compatible with MK-122.

500

What happens if a MK-122 safety switch is not properly oriented?

 **EXTRA QUESTION**

What is the proper position of the coaxial cable?

Failure to properly orient MK 122 switch can cause weapons to dud.

**

Orient coaxial cable AFT of the lanyard pin on the longitudinal axis of the bomb body.