flange of the signal cartridge must rest on the
bore shoulder, which is about 1 1/4 inches
inward from the nose of the bomb.
Carefully insert the firing-pin assembly with
the firing-pin end toward the signal.
Rotate the firing-pin assembly so that the two
notches in the lip of the forward cup line up
with the cotter pin holes in the nose end of the
bomb. Do not apply pressure to the firing pin
during this procedure.
Insert the cotter pin through the pinholes in the
bomb body. Pass it through the notches in the
firing-pin assembly. Spread the ends of the
cotter pin just enough to retain it in place.
REVIEW NUMBER 1 ANSWERS
For information about the GP bomb
assembly, you should refer to Airborne
A maximum of 15 square inches of thermal
coating can be missing from a GP bomb, and
it is still considered thermally protected.
An M904E4 mechanical nose fuze with an
M148E1 adapter booster is used with the
thermally protected Mk 80 bomb.
Only the Mk 376 and FMU-139 electrical tail
fuzes are used in live GP retarded bombs.
Mk 122 arming safety switches are installed
in GP bombs in an RADHAZ-free environ-
BDU-48 Practice Bomb
The BDU-48 practice bomb is prepared for aircraft
loading as discussed in the following steps:
NOTE: The warnings discussed for the
Mk 76 Mod 5 also applies to the BDU-48.
Remove the firing device and inspect for rust or
identification of the components.
Inspect the blast tube for rust and deformation.
Clean as required.
Insert the signal into the sleeve. With the firing
device removed, elevate the nose of the bomb.
Insert the Mk 4 or CXU-3A/B practice bomb
signal, primer end up, and slide it gently into
place. Do not use force. The base flange of the
signal cartridge must rest on the bore shoulder.
Carefully insert firing pin assembly into the
nose of the bomb.
Align firing pin assembly notches with the two
holes in the nose end of the bomb. Insert cotter
pin through holes in bomb body, and spread
end of cotter pin just enough to remain in place.
Figure 13-13.BDU-48/B practice bomb.