|
| |
Back
Figure 2-25.—Spreading gun installation | Up
Aircrew Survival Equipmentman 2 - Aviation theories and other practices | Next
CHAPTER 3 NES-12 PERSONNEL PARACHUTE SYSTEM |
18. Clean the cartridge chamber and threads
with a small amount of denatured alcohol. Ensure
that the old sealing compound and all foreign
matter is removed. Tilt the gun to allow the
alcohol to run out of the gun.
19. Feel the inside of the cartridge chamber
to ensure that the slug pistons do not stick out
inside the chamber. If the pistons do protrude,
push them back as necessary. Feel the bottom of
the chamber to ensure there is no foreign object
in the chamber. The bottom should be smooth
metal.
20. Prior to the cartridge installation, stamp
on the cartridge, in the approximate position
shown in figure 2-26, the following information:
lot number, manufacturer’s symbol, month and
year of loading. Use black marking ink and make
the characters as large as practicable for the
available space. The same markings, plus ex-
piration date and the can open date, must also
be stamped on the cartridge head, using characters
no smaller than 1/16 inch high.
21. Record the type of cartridge, part number,
delay time, lot number, and service life expiration
date on the Parachute Configuration, Inspection,
and History Record.
22. Apply sealing compound to the top two
threads of the cartridge. (See figure 2-26.)
Figure 2-26.-Cartridge markings-head and side.
23. Attach the new cartridge to the retaining
cord by passing the pin through the screw base
of the cartridge and the loop that is located at the
end of the retaining cord.
NOTE: Never force the cartridge into the
chamber. This could damage the gun.
When a cartridge is properly installed, the
base should be approximately even with
the top edge of the chamber. If the
cartridge base is more than one thread
above the edge, remove the cartridge and
check the bottom of the chamber for any
obstruction,
such as protruding slug
pistons.
24. Having inserted the cartridge into the
chamber, you tighten it manually. If the cartridge
stops before the threads are engaged, remove the
cartridge and again check for protruding slug
pistons. Push them back if necessary.
25. Replace the gun in the clamp or V-block
assembly in accordance with steps 3 and 4. Using
a cartridge extractor wrench and torque wrench
with a 3/4-inch socket, you must torque the
cartridge to 84 inch-pounds (plus or minus 12
inch-pounds).
26. Remove the spreading gun from the clamp
or V-block assembly. Do not remove the safety
pin. Put the cartridge extractor wrench back on
the swivel/stanchion bolt.
27. Check stowage of the firing lanyard.
Restow it if necessary.
28. Close the extractor sleeve. Now your job
has been completed.
To install a ballistic spreader gun onto a
parachute, you must refer to the Emergency
Personnel and Drogue Parachute Systems
Manual, NAVAIR 13-1-6.2. Repacking a
parachute with a ballistic spreader gun is discussed
in chapter 3 of this manual.
2-15
|
