FULL-SCALE PRACTICE BOMBS (BDU-45)

Preparation and inspection of BDU-45 (fig. 13-15) full-scale practice bombs are the same as the GP bombs

Figure 13-15.-BDU-45/B (typical) practice bomb.

discussed earlier in this chapter with the following exceptions. The spotting charge receptacles must be checked to ensure they are clean, free of foreign material and moisture, and not deformed.

CXU-4/B Spotting Charge

Prepare, inspect, and install the CXU-4/B spotting charge as follows:

1. Check spotting charge for damage or leakage.

2. Ensure retaining ring and spring washer are present.

3. Install spring washer at base of spotting charge receptacle.

4. Slide spotting charge into receptacle and secure with retaining ring (pliers may be required).

MXU-735 Nose Plug

Inspect and install nose plug as follows:

Figure 13-16.-Mk 89 Mod 0 bomb spotting charge adapter. 13-16

1. Ensure threads are not damaged

2. Install nose plug, tighten with spanner wrench or rachet, and tighten nose setscrew.

Electric/Electronic TaiI Fuzes

Procedures for inspection and installation of tail fuzes FMU-139 and Mk 376 are the same as for GP bombs, as outlined previously in this chapter.

Mk 89 Mod 0 Spotting Charge Adapter

Prepare and inspect the Mk 89 spotting charge adapter (fig. 13-16) as follows:

1. Remove tape holding cotter pin with instruction tag attached

2. Remove inertia sleeve and compression safety spring by unscrewing firing pinhead from adapter body.

3. Inspect all components, and reject adapter if any components are damaged.

Mk 4 and CXU-3 Cartridge Installation

Install signal cartridge in spotting charge adapter as follows:

1. Insert inertia sleeve into cavity body.

2. Slide cartridge through inertia sleeve with cartridge rim against forward end of sleeve.

3. Press blocking pin inward until safety pin presses through the second guide hole, locking blocking pin in place.

4. Insert cotter pin through outer set of holes in head of safety pin and safety pin sleeve. Bend leg of cotter pin slightly to hold in place.

5. Place compression safety spring over firing pin head into adapter body and hand tighten.

Mk 89 Spotting Charge Installation

Install Mk 89 spotting charge adapter with signal cartridge as follows:

1. Verify bomb tail well is clean.

2. Insert adapter in the same manner as electric fuzes.

NOTE: The procedures for inspection and installation of nose fuzes and bomb fins are the same as those discussed previously in this chapter for GP bombs.