FM 4-20.105 AIRDROP OF SUPPLIES AND EQUIPMENT: DUAL ROW AIRDROP SYSTEMS (SEPTEMBER 2003) - page 3

 

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FM 4-20.105 AIRDROP OF SUPPLIES AND EQUIPMENT: DUAL ROW AIRDROP SYSTEMS (SEPTEMBER 2003) - page 3

 

 

FM 4-20.105/TO 13C7-1-51
TYPES OF INSPECTIONS
3-27. The types of inspections performed on a rigged load are the final rigger
inspection, the before-loading inspection, and the after-loading inspection. All
rigged DRAS loads must be inspected at prescribed intervals to make sure
that the loads and the equipment used on the loads are assembled and installed
to meet the criteria outlined in the specific rigging chapter.
a.
Final Rigger Inspection ( Shop Final). After the load has been
completely rigged, a certified Transported Force Rigger Inspector
performs the final rigger inspection. This inspection is accomplished
before the rigged load leaves the rigging site to make sure it is rigged
according to the specific chapter for that particular load. This inspection
should be conducted by an inspector other than the rigger supervising
the installation of parachutes and deployment system. It is not neces-
sary to use the DD Form 1748-series inspection forms for this inspec-
tion.
b.
Before-Loading Inspection. A before-loading inspection must be
performed on a rigged load before it is loaded into the aircraft. This
inspection is conducted jointly by a certified Transported Force Rigger
Inspector and a certified Air Force Joint Airdrop Inspector. The inspec
tors use the proper joint airdrop inspection record, and both sign the
appropriate blocks to certify correct rigging of the load. When the rigged
load is delivered to the aircraft, the aircraft loadmaster checks the
inspection form for completion and necessary signatures before accept-
ing the load.
c.
After-Loading Inspection. After the loadmaster completes the loading
and in-aircraft rigging, the after-loading inspection is performed. This
inspection is conducted jointly by a certified Transported Force Rigger
Inspector, a certified Air Force Joint Airdrop Inspector, and the aircrew
loadmaster. After the inspection is completed, the three inspectors
certify, by signing the form,that the load is ready to airdrop.
3-48
FM 4-20.105/TO 13C7-1-51
CHAPTER 4
RIGGING DUAL ROW AIRDROP SYSTEM (DRAS)
M998 / M1038/ M1097 CARGO/ TROOP CARRIER HMMWV
DESCRIPTION OF LOAD
4-1. The HMMWV truck is rigged on a DRAS platform for DRAS airdrop. An
accompanying load weighing a minimum of 800 pounds and a maximum of
2,000 pounds must be rigged in the truck. The load is rigged with three G-11D
cargo parachutes.
a. The M998 Cargo/Troop Carrier ( Figure 4-1). It weighs 5,200 pounds. It
is 180 inches long and 85 inches wide. The reduced height of the vehicle is
54 inches.
b. The M998A1 Cargo/Troop Carrier. It weighs 5,380 pounds. It is 180
inches long and 86 inches wide. The reduced height of the vehicle is 56
inches.
c. The M1038 with winch Cargo/ Troop Carrier. It weighs 5,327 pounds. It
is 180 inches long and 86 inches wide. The reduced height of the vehicle is
54 inches.
d. The M1038A1 with winch Cargo/Troop Carrier. It weighs 5,507 pounds.
It is 186 inches long and 86 inches wide. The reduced height of the vehicle
is 56 inches.
e. The M1097 Cargo/Troop Carrier. It weighs 5,600 pounds. It is 180 inches
long and 85 inches wide. The reduced height of the vehicle is 54 inches.
Figure 4-1. M998/ M1038/ M1097 Cargo/ Troop Carrier HMMWV
4-1
FM 4-20.105/TO 13C7-1-51
PREPARING PLATFORM
4-2. Inspect, or assemble and inspect, a DRAS platform with outrigger assem-
blies and outrigger platform support weldments and link assemblies according
to TM 10-1670-268-20&P/TO 13C7-52-22 and as shown in Figure 4-2.
CLEVISES
18A THROUGH 1A
LEFT
REAR
FRONT
RIGHT
CLEVISES
18 THROUGH 1
Step:
1. Starting at the front of each platform side rail, install clevises on the bushings bolted on
holes 1 (triple), 2, 5, 7, 9, 10, 13 (double-invert bottom clevis on right side of platform),
15, 16, 18, 25, 27, 28, 29, and 30.
2. Starting at the front of the platform, number the clevises 1 through 18 on the right side
and 1A through 18A on the left side.
3. Label the tie-down rings according to Figure 3-1.
NOTE: The clevis attached to the 13th bushing is clevis number 10 and the doubled clevis
is number 11.
Figure 4-2. Platform Prepared
4-2
FM 4-20.105/TO 13C7-1-51
BUILDING AND PLACING HONEYCOMB STACK
4-3. Prepare the honeycomb stacks for the trucks as shown in Figure 4-3.
Position the honeycomb stacks as shown in Figure 4-4.
Stack
Pieces
Width
Length
Material
Instructions
Number
(inches
)
(inches
)
1 and
3
1
24
80
Honeycomb
This is the base.
3
24
54
Honeycomb
Center and glue together and glue to
base.
1
24
54
3/4-inch
Center and glue to top of 24-inch by 54-
Plywood
inch honeycomb.
1
24
54
Honeycomb
Center and glue to top of 24-inch by 54-
inch plywood.
2
24
20
Honeycomb
Center and glue to top of 24-inch by 54-
inch honeycomb.
1
24
20
3/4-inch
Center and glue to top of 24-inch by 20-
Plywood
inch honeycomb.
1
24
20
Honeycomb
Center and glue to top of 24-inch by 20-
inch plywood.
Figure 4-3. Honeycomb Stacks Prepared
4-3
FM 4-20.105/TO 13C7-1-51
REAR
FRONT
43”
18”
27”
8”
12”
8”
NOTE: Drawing is not to scale.
All dimensions are given in inches.
Stack
Pieces
Width
Length
Material
Instructions
Number
(inches)
(inches)
2
3
26
43
Honeycomb
Glue together to
f
3
18
43
Honeycomb
Center and glue to
t
1
18
43
3/4-inch
Use in next step.
Plywood
2
4X4
43
Lumber
Nail one piece to
t
by 3/4-inch plywood, 1 1/2-inches from
t
43-inch edge.
1
18
43
3/4-inch
Nail on top of the 4X4 lumber and glue
t
Plywood
the 18-inch by 43-inch honeycomb.
1
18
43
Honeycomb
Cut out an 18-inch by 27-inch section
centered on the honeycomb and glue
t
the 18-inch by 43-inch by 3/4-inch
plywood ( Shown above).
Figure 4-3. Honeycomb Stacks Prepared (Continued)
4-4
FM 4-20.105/TO 13C7-1-51
NOTE: Drawing is not to scale.
All dimensions are given in inches.
REAR
Stack
Stack
Stack
FRONT
3
2
1
4”
63”
134”
Stack
Position of Stack on Platform
Number
Place stack:
1
4 inches from front edge of platform and centered.
2
63 inches from the front edge of the platform and centered.
3
134 inches from the front edge of the platform and centered.
Figure 4-4. Honeycomb Positioned
4-5
FM 4-20.105/TO 13C7-1-51
INSTALLING OPTIONAL DRIVE- OFF AID ON PLATFORM
4-4. Install the drive-off aid as shown in Chapter 3, Figure 3-5.
PREPARING TRUCK
4-5. Prepare the truck as described below.
a. Make sure the fuel tank is no more than 75% full. Prepare the
fuel tank filler cap and fuel filler opening as shown in Figure 4-5.
Prepare the fuel tank drain plug as shown in Figure 4-6.
NOTE: Certain units may be authorized a waiver allowing 95% fuel. One way
to verify the tank is 95% full is to fill the tank and withdraw 1 1/4 gallons with
a hand pump.
CAUTION
A full tank does not allow for expansion,
and is a danger to aircraft and air crew.
b. Make sure the batteries and battery compartment comply
with AFJMAN 24-204/TM 38-250.
c. Prepare the cab of the truck as shown in Figure 4-7.
1
2
1 Tie the fuel filler cap to the body of the truck with type III nylon cord.
2 Tape the fuel filler opening.
Figure 4-5. Fuel Tank Filler Cap and Opening Prepared
4-6
FM 4-20.105/TO 13C7-1-51
1
1
Place a 12-inch length of cloth-backed tape over the fuel tank drain plug.
Figure 4-6. Fuel Tank Drain Plug Prepared
4-7
FM 4-20.105/TO 13C7-1-51
2
10
9
7
4
6
5
8
1
Remove all doors, covers, and supporting bows (not shown).
2
Tape the windshield glass on both sides in an X.
3
Remove and pad the mirrors. Secure them under the driver's seat with type III nylon cord
(not shown).
4
Tie the engine start switch in the engine stop position with type I, 1/4-inch cotton webbing.
5
Tie the steering wheel to the seat frame in two places with type III nylon cord, or use the
retractable steering wheel locking cable. If the locking cable is used, secure it to the steering
wheel with type III nylon cord, not a padlock.
6
Tie the emergency brake handle in the off position with type III nylon cord.
7
Place the transmission and four-wheel drive levers in the neutral position.
8
Tie the seat cushions to the seat frames with type III nylon cord. Fold the passenger seats
in four-door trucks and secure them with the pins provided.
9
Tie the fire extinguisher in place in itís designed rack with two lengths of type III nylon
cord.
10
Tape all instrument panel gauges.
Figure 4-7. Cab Prepared
4-8
FM 4-20.105/TO 13C7-1-51
d. Secure and pad radio equipment in the cab section as shown
in Figure 4-8.
2
1
3
1
Secure communications equipment in its mount with chains and padlocks.
2
Tie the equipment to its mount with 1-inch tubular nylon webbing.
3
Pad the front of the equipment generously with cellulose wadding taped in place. Pad the
radio handset with cellulose wadding and tie the handset to the mount with type III nylon
cord.
4
Remove antennas and stow with the doors. Pad the antenna mounts with cellulose wadding
taped in place (not shown).
Figure 4-8. Communications Equipment Secured and Padded
4-9
FM 4-20.105/TO 13C7-1-51
e. Prepare the front of soft-top trucks with foldable windshields
as shown in Figure 4-9.
1
10-inch by 80-inch Honeycomb
2
SIDE VIEW
TAPE
1234567890123456789012345678901212345
10î
DIAGRAM 1
1
Tape all lights and reflectors.
2
Cut a 10-inch by 80-inch piece of honeycomb. Taper crush 5 inches the length of the
honeycomb. Tape the 10-inch width of the honeycomb (See diagram 1). Place the honeycomb
flush on the front end of the hood with the taper up and to the rear of the vehicle. Cut an
18-inch by 80-inch piece of honeycomb. Position on top of and flush with the front of the 10-
inch by 80-inch piece of honeycomb. Tie the two pieces of honeycomb together with type III
nylon cord around the 80 inch length. Tape top piece of honeycomb where the type III nylon
cord will come in contact.
Figure 4-9. Front of Truck Prepared
4-10
FM 4-20.105/TO 13C7-1-51
20î
3
36î
83î
NOTE: Drawing is not to scale.
All dimensions are given in inches.
4
7
5
6
3
Place two 36-inch by 83-inch pieces of honeycomb, with cutouts as shown, on top of the
previously positioned honeycomb and flush with the front. Tape the 36 inch sides and front
edge on the top piece of honeycomb.
4
Secure the 36-inch by 83-inch honeycomb pieces with a length of type III nylon cord.
Tie the type III nylon cord to the left hood latch over the honeycomb, through the center of
the grill, over the right side of the honeycomb and tie to the right hood latch.
5
Run a length of type III nylon cord through the securing tie on the bottom two layers of
honeycomb and through the securing tie on the top two layers of honeycomb on each side of
the load.
6
Cut a 4-inch by 80-inch length of honeycomb. Position the honeycomb behind the installed
honeycomb. Mark and crush an area for the windshield wipers.
7
Cover the breather cap with one layer of felt and tape in place with cloth-backed tape.
Figure 4-9. Front of Truck Prepared (Continued)
4-11
FM 4-20.105/TO 13C7-1-51
9
8
8
Cut four 4-inch by 4-inch by 1/2-inch pieces of felt. Position two pieces of felt under each
end of the 4-inch by 80-inch honeycomb. Pad and tape the hood latches and tape the 4-inch
by 4-inch pieces of felt in position.
9
Fill the void between the 4-inch by 80-inch honeycomb and the windshield with cellulose
wadding. Ensure the entire void is filled to prevent the windshield from breaking.
Figure 4-9. Front of Truck Prepared (Continued)
4-12
FM 4-20.105/TO 13C7-1-51
NOTE: Drawing not to scale.
All dimensions are given in inches.
78”
3/4” PLYWOOD
19”
DIAGRAM 2
1”
1” HOLES
6”
Cut a 19-inch by 78-inch by 3/4-inch piece of plywood and drill holes as shown in diagram 2.
11
10
12
10
Lay the windshield down. Cut a 19-inch by 78-inch piece of honeycomb to protect the
windshield. Cut out an opening for the windshield wiper motor. Position honeycomb on top
of the windshield.
11
Position the 19-inch by 78-inch by 3/4-inch piece of plywood, as shown in diagram 2, on
top of the 19-inch by 78-inch honeycomb with the holes toward the rear of the vehicle.
12
Secure a length of 1/2-inch tubular nylon through the 1/2-inch hole in the plywood and
through the top door hinge bracket on each side of the load.
Figure 4-9. Front of Truck Prepared (Continued)
4-13
FM 4-20.105/TO 13C7-1-51
SOFT TOP HMMWV FRONT ATTITUDE CONTROL SYSTEM
13
NOTE: Drawings not to scale.
All dimensions are given in inches.
DIAGRAM 3
86”
4 EACH 2” X 6” CUTOUTS THROUGH TOP &
BOTTOM PIECES OF 3/4”X 33”X86” PLYWOOD
6”
4”
31”
TOP VIEW
2”
2”X4”X 31” LUMBER
2”X4”X 33” LUMBER
5”
2”X4”X 37” LUMBER
8 1/2” SPACING TYPICAL
BETWEEN LUMBER
4”X4”X 94” LUMBER
REAR
FRONT
4”X4”X 86” LUMBER
SIDE VIEW
2”X4”X 86” LUMBER
Figure 4-9. Front of Truck Prepared (Continued)
4-14
FM 4-20.105/TO 13C7-1-51
13
Build the soft top HMMWV front attitude control system (ACS) as described below and
as shown in diagram 3 on previous page.
a. Make four 2-inch by 6-inch cutouts through the top and bottom of the
plywood sheets 21 3/4-inches in from the edge of the plywood as shown in
diagram 3.
b. Nail two pieces of plywood with the 2x4’s between them as shown in
diagram 3 using 8d nails every 6 inches.
c. Nail one 4x4x94-inch piece of lumber on top of the plywood sandwich,
centered and 6-inches from the front edge using 40d nails every 10 inches.
d. Nail one 4x4x86-inch piece of lumber on the bottom front edge of the
plywood sandwich using 40d nails every 10 inches.
e. Nail one 2x4x86-inch piece of lumber to the bottom of the 4x4x86 piece
of lumber previously installed using 10d nails every 10 inches.
14
14
Build two honeycomb stacks using nine 14-inch by 20-inch sheets of honeycomb glued
together with a 3/4-inch by 14-inch by 20-inch piece of plywood glued to the bottom. Place
one on each seat with the plywood to the bottom.
Figure 4-9. Front of Truck Prepared (Continued)
4-15
FM 4-20.105/TO 13C7-1-51
17
16
15
18
19
15
Position front ACS on the honeycomb stacks with the 2x4 lumber resting on the dash and
flush against the windshield.
16
Pad sharp edges around the 4x4 lumber at the cutouts and the front edges of the cutouts,
where the slings will come in contact, with felt and tape to secure.
17
Route a lashing from the front left lifting shackle down through the front left cutout and
up through the rear left cutout over the 4x4 lumber and load bind in front of the 4x4 lum-
ber. Pad and tape load binder with felt. Repeat for right side.
18
Route a 30-foot lashing over the ACS board 6 inches forward of the rear of the plywood edge,
down and around frame of vehicle and up to top of ACS board. Position the load binder on
top right side of ACS board.
19
Route a second 30-foot lashing over the front ACS board in front of the 4x4 lumber down
and around the frame of vehicle and up to top of ACS board. Position the load binder on top
left side of ACS board.
Figure 4-9. Front of Truck Prepared (Continued)
4-16
FM 4-20.105/TO 13C7-1-51
f. Prepare and secure the pioneer tool kit according to TM 9-2320-280-10/
TO 36A12-1A-2091-1/ TM 2320-10/6 and as shown in Figure 4-10.
1
2
3
1
Tape all sharp edges of the pioneer tools. Pad the ax head with cellulose wadding and tape.
2
Place the tools in the rack, and secure them with the straps provided and type III
nylon cord.
3
Close and latch the tool rack. Tie the rack in place with type III nylon cord.
Figure 4-10. Pioneer Tool Kit Secured
4-17
FM 4-20.105/TO 13C7-1-51
g. Prepare the underside of the truck as shown in Figure 4-11.
1
1
Pad the lower control arms on the front and rear of the truck with cellulose wadding and
tape in place.
2
3
2
Pass a 15-foot lashing over the right frame rail, under the oil pan, and over the left frame
rail. Make sure the lashing goes over the exhaust pipe and then under it. Make sure the
wires running along the frame rail are to the outside of the lashing. Place a 12-inch by 12-
inch piece of honeycomb and a 2- by 6- by 16-inch piece of lumber between the lashing and
the oil pan. Secure the lashing with a load binder and D-ring.
3
Install another lashing just to the rear of the lashing installed in step 2 above. Route the
lashing in the same way.
Figure 4-11. Under Side of Truck Prepared
4-18
FM 4-20.105/TO 13C7-1-51
STOWING ACCOMPANYING LOAD
4-6. Use the procedures shown in Figure 4-12 to stow 16 boxes of 105 mm
ammunition and truck equipment.
2
1
4
3
1
Lay two 30-foot lashings lengthwise across the cargo bed, passing them through the left
and right tie-down rings in the cargo floor.
2
Lay two 15-foot lashings widthwise across the cargo bed passing through the center and
rear tie-down rings in the cargo floor.
3
Cover the cargo floor using two pieces of honeycomb to make a 52-inch by 80-inch layer.
Position the rear of the layer 1 1/2 inches from the rear of the cargo bed.
4
Space four 15-foot lashings evenly across the width of the cargo bed.
Figure 4-12. Stowing Ammunition and Truck Equipment
4-19
FM 4-20.105/TO 13C7-1-51
6
7
9
8
5
5
Position 16 boxes of 105 mm ammunition on the honeycomb in two layers of eight boxes.
6
Bind the boxes together with the four side-to-side lashings placed in step 4.
7
Secure the lashings placed in step 2.
8
Join the left front and right rear 30-foot lashing placed in step 1 with two D-rings and load
binder.
9
Join the left rear and right front 30-foot lashing placed in step 1 in the same way as in step
8.
Figure 4-12. Stowing Ammunition and Truck Equipment (Continued)
4-20
FM 4-20.105/TO 13C7-1-51
10
11
10
Close the tailgate. Secure it to the chain hook brackets with a double length of 1/2-inch
tubular nylon.
11
Wrap the truck tarpaulin bows in cellulose wadding and tape the wadding in place. Position
the bows with the legs on the outside of the sideboards on the front of the cargo bed. Secure
the bows to the top crew compartment cross-member with type III nylon cord.
Figure 4-12. Stowing Ammunition and Truck Equipment (Continued)
4-21
FM 4-20.105/TO 13C7-1-51
PLYWOOD
( 12” X 24” X 3/4” )
NOTE: Drawing not to scale.
All dimensions are given in inches.
12
HONEYCOMB
( 12” X 24” )
DIAGRAM 4
13
14
12
Cut twelve 12-inch by 24-inch pieces of honeycomb. Form two rear ACS support stacks by
gluing six layers of 12-inch by 24-inch honeycomb. Cut two 12-inch by 24-inch by 3/4-inch
pieces of plywood and glue one piece on top of each stack as shown in diagram 4 above.
13
Position the rear ACS support stacks on the front edge of the rear wheel wells. Secure the
support stacks with two lengths of type III nylon cord to a convenient point on the load.
14
Wrap the cross pieces of the center beam support with cellulose wadding and tape padding
in place. Place the center support beam, doors, and cargo covers in the cargo bed and
secure with type III nylon cord to convenient points on the load.
Figure 4-12. Stowing Ammunition and Truck Equipment (Continued)
4-22
FM 4-20.105/TO 13C7-1-51
LIFTING AND POSITIONING TRUCK AND INSTALLING OPTIONAL
DRIVE-OFF AIDS
4-7. Install the lift slings and position the truck on the honeycomb stacks as
shown in Figure 4-13. Attach the optional drive-off aids to the wheels of the
truck as shown in Chapter 3.
1
Attach a 9-foot (2-loop) type XXVI nylon sling to each airlift bracket on the hood of the truck
with a medium clevis (not shown).
2
Attach a 12-foot (2-loop) type XXVI nylon sling to each rear lifting shackle with a medium
clevis. Route the slings through the sling guides on each side of the tailgate (not shown).
3
Position the truck with the front cross member on the front edge of stack 1. Ensure the
center frame cross member rests squarely on the 6 inch part of honeycomb on stack 2.
4
Install the drive-off aids on the rear wheels before completely lowering the rear of the truck.
5
Remove the lift kit (not shown).
Figure 4-13. Truck Positioned
4-23
FM 4-20.105/TO 13C7-1-51
LASHING TRUCK
4-8. Lash the truck to the platform according to Chapter 3 and as shown in
Figures 4-14 through 4-17.
3
4
1
2
2
2A
1
1A
Lashing
Tiedown
Instructions
Numbe r
Clevis Numbe r
Pass lashing:
1
1
Through left front
t
2
1A
Through right front
t
3
2
Through right front
t
4
2A
Through left front
t
Figure 4-14. Lashings 1 through 4 Installed
4-24
FM 4-20.105/TO 13C7-1-51
7
5
7
8
Lashing
Tiedown
Instruction s
Number
Clevis Number
Pass lashing :
5
6
Around right front lower control arm
6
6A
Around left front lower control arm
7
7
Through tiedown bracket behind right front coil spring
8
7A
Through tiedown bracket behind left front coil spring
Figure 4-15. Lashings 5 through 8 Installed
4-25
FM 4-20.105/TO 13C7-1-51
12
10
9
12
11
8
Lashing
Tiedown
In stru ction s
Number
Clevis Numbe r
Pass lashing
:
9
8A and
8
Through clevis 8A and back through it's own D-ring through
stack 2, Load bind to clevis
8
10
11
Through tiedown bracket in front of right rear coil spring
11
11A
Through tiedown bracket in front of left rear coil spring
12
12
Around right rear lower control arm
13
12A
Around left rear lower control arm
Figure 4-16. Lashings 9 through 13 Installed
4-26
FM 4-20.105/TO 13C7-1-51
16
17
15
14
15A
16A
15
16
Lashing
Tiedown
Intruction s
Number
Clevis Number
Pass lashing :
14
15
Through left rear tiedown point
15
15A
Through right rear tiedown point
16
16
Through right rear tiedown point behind the coil spring
17
16A
Through left rear tiedown point behind the coil spring
Figure 4-17. Lashings 14 through 17 Installed
4-27
FM 4-20.105/TO 13C7-1-51
INSTALLING SUSPENSION SLINGS AND REAR ATTITUDE CONTROL
SYSTEM
4-9. Construct, inspect, and position the rear Attitude Control System (ACS)
according to Chapter 3 and as shown in Figure 4-18. Install the suspension
slings and secure ACS according to Chapter 3 and as shown in Figure 4-19.
1
1
Position the rear ACS on the rear ACS support stacks 12 inches from the rear of the stacks
with the 4x4 lumber facing the front of the truck.
CAUTION
Insure the ACS is centered on the load.
Figure 4-18. Rear Attitude Control System Positioned
4-28
FM 4-20.105/TO 13C7-1-51
2
3
1
5
4
1
Install a 3-foot (4-loop), type XXVI nylon sling to clevises 4 and 5. Connect an 11-foot (4-
loop), type XXVI nylon sling to the center of the 3-foot sling with a 3 3/4-inch two point
link.
2
Route the sling over ACS 4x4 from front to rear. Pad and tape the 11-foot
sling with felt from a point 6 inches below the 4x4 to a point 6-inches above the top of the
ACS.
3
Safety tie the 3 3/4-inch two point link to the ACS 4x4 with a loop of type III nylon cord.
Ensure the tie is tight.
4
Install a 3-foot (4-loop), type XXVI nylon sling to the other end of the 11-foot sling with a 3
3/4-inch two point link. Pad and tape the link with felt (not shown). See Chapter 3.
5
Repeat steps 1 through 4 on the left side of load using clevises 4A and 5A.
Figure 4-19. Slings Installed and ACS Secured
4-29
FM 4-20.105/TO 13C7-1-51
7
6
10
3
6
Route a lashing from clevis 3 over right ACS 4x4 from rear to front, around the ACS
4 by 4-inch lumber and back to clevis 3.
7
Route a lashing from clevis 10 under right ACS 4x4 from front to rear, up and around
the ACS 4x4 and back to clevis 10.
8
Repeat steps 7 through 9 on the left side of load using clevises 3A and 10A (not
shown).
9
Ensure the ACS is straight and centered on load. Load binders on both sides of the load
must be closed at the same time in the following sequence: 3 and 3A, 10 and
10A.
Figure 4-19. Slings Installed and ACS Secured (Continued)
4-30
FM 4-20.105/TO 13C7-1-51
11
13
10
14
13
10
Install a 3-foot (4-loop), type XXVI nylon sling to clevises 13 and 14. Connect an 11-foot
(4-loop), type XXVI nylon sling to the center of the 3-foot sling with a 3 3/4-inch two point
link.
11
Route the sling through the clevis on the ACS from rear to front. Pad and tape the 11-foot
sling with felt from a point 6 inches below the clevis to a point 6 inches above the top of the
ACS.
12
Safety tie the 3 3/4-inch two point link to the ACS clevis with a loop of type III nylon cord.
Ensure the tie is tight.
13
Install a 3-foot (4-loop), type XXVI nylon sling to the other end of the 11-foot sling with a
3 3/4-inch two point link. Pad and tape the link (not shown). See Chapter 3.
14
Repeat steps 10 through 13 on the left side using clevises 13A and 14A (not shown).
Figure 4-19. Slings Installed and ACS Secured (Continued)
4-31
FM 4-20.105/TO 13C7-1-51
15
16
17
9
15
Route a 30-foot lashing from clevis 9, through the right rear ACS clevis from outside to
inside, rear to front, around the ACS 4x4 and back to clevis 9.
16
Route a lashing from clevis 17 through right rear ACS clevis from outside to inside, front to
rear, around ACS 4x4 and back to clevis 17.
17
Repeat steps 15 and 16 on left side of load using clevises 9A and 17A (not shown).
Figure 4-19. Slings Installed and ACS Secured (Continued)
4-32
FM 4-20.105/TO 13C7-1-51
21
18
20
18
Remove all slack from the front sling and lay sling across the top of the ACS 4x4 from front
to rear. Tie two lengths of type III nylon cord over the sling, behind all lashings, and
around ACS 4x4 forming a crisscross pattern.
19
Repeat step 18 for left front sling( not shown).
20
Remove all slack from the rear sling. Tie a length of type III nylon cord around the 11-foot
sling and the ACS sling.
21
Tie a length of type III nylon cord around the 11-foot nylon sling, behind all lashings, and
the ACS 4x4, tie the ends together.
22
Repeat steps 20 and 21 for left rear sling(not shown).
Figure 4-19. Slings Installed and ACS Secured (Continued)
4-33
FM 4-20.105/TO 13C7-1-51
INSTALLING OUTRIGGER ASSEMBLIES
4-10. Assemble, install, and safety the mast and foot assemblies on the DRAS
platform according to TM 10-1670-268-20&P/TO 13C7-52-22 and as shown in
Chapter 3, Figures 3-33 through 3-35 and Figure 3-36 steps 1,2,and 3.
STOWING CARGO PARACHUTES
4-11. Prepare, stow, and restrain three G-11D cargo parachutes on top of the
hood of the truck as shown in Chapter 3 and as shown in Figure 4-20.
1
11
6
1
Restrain the parachutes using type VIII nylon webbing tied to bushings 6, 6A, 11, and 11A.
Figure 4-20. Cargo Parachutes Installed
4-34
FM 4-20.105/TO 13C7-1-51
STOWING DEPLOYMENT PARACHUTE
4-12. Prepare, stow, and install the deployment parachute according to Chapter
3, Section IV and as shown in Figure 4-21.
Figure 4-21. Deployment Parachute Installed
4-35
FM 4-20.105/TO 13C7-1-51
INSTALLING PARACHUTE RELEASE SYSTEM
4-13. Build an M-1 release stack as shown in Figure 4-22.
Prepare and install an M-1 release system according to Chapter 3, Section V
and as shown in Figure 4-23.
24”
24”
NOTE: Drawing not to scale.
All dimensions are given in inches.
HONEYCOMB
1
2
1
Cut eight 24-by 24-inch pieces of honeycomb and glue together to form the M-1 release
parachute stack. Ensure the support stack is higher than the highest point in the
cargo bed. Tape the top edges of the honeycomb.
2
Center the M-1 release support stack in front of the rear ACS. Secure the support stack
to convenient points in the cargo bed with two lengths of 1/2-inch tubular nylon webbing.
Figure 4-22. Parachute Release Stack Positioned
4-36
FM 4-20.105/TO 13C7-1-51
1
2
4
5
1
Center the M-1 release on the support stack and safety tie to a convenient place on the load
with type III nylon cord.
2
Attach riser extensions and suspension slings to the M-1. NOTE: Remove the buffers from
the ends of the suspension slings that attach to the M-1.
3
Group the riser extentions together and tie with type I, 1/4-inch cotton webbing, making
three ties (not shown).
4
S-fold the slack in the rear suspension slings on top of the rear ACS. Make two ties with
type I, 1/4-inch cotton webbing around each sling and the rear ACS.
5
S-fold the slack in the front suspension slings on top of the crew compartment cross mem-
ber. Make two ties with type I, 1/4-inch cotton webbing around each sling and the cross
member.
Figure 4-23. Parachute Release System
4-37
FM 4-20.105/TO 13C7-1-51
INSTALLING MAST RELEASE KNIVES
4-14. Install the mast release knives according to Chapter 3, Figure 3-36,
steps 4 through 10 and as shown in Figure 4-24.
1
2
1
1
The length of the left and right 1/2-inch tubular nylon webbing from the base of the
guillotine knives to the lower suspension links of the M-1 release is 67 inches (shown
in steps 5 through 7 of Figure 3-36).
2
Tie a length of type III nylon cord through the left tailgate sling guide and to the body of
the right top guillotine knife that measures 86-inches from the tailgate sling guide to the
base of the guillotine knife. Repeat for right tailgate sling guide and left lower guillotine
knife (shown in steps 9 and 10 of Figure 3-36).
Figure 4-24. Mast Release Knives Installed
4-38
FM 4-20.105/TO 13C7-1-51
MARKING RIGGED LOAD
4-15. Mark the rigged load according to Chapter 3 and as shown in Figure 4-25.
A Shipper’s Declaration for Dangerous Goods is required.
EQUIPMENT REQUIRED
4-16. The equipment required to rig these loads are given in Table 4-1.
CAUTION
Make the final rigger inspection required by
Chapter 3 before load leaves rigging site.
RIGGED LOAD
Weight: M998
10,912 pounds
M1038
11,165 pounds
M1097
10,097 pounds
Height
98 inches
Width
94 inches
Overall Length
229 inches
Overhang: Front
12 inches
Rear
0 inches
Center of Balance (from front edge of platform):
M998
89 inches
M1038
91 inches
M1097
90 inches
Figure 4-25. M998/M1038/M1097 Cargo/Troop Carriers Rigged for Dual Row Airdrop
4-39
FM 4-20.105/TO 13C7-1-51
Table 4-1. Equipment required for rigging M998/M1038/M1097 cargo/troop carriers for dual row
airdrop.
National Stock
Item
Quantity
Number
8040-00-273-8713
Adhesive paste, 1-gal
As required
4020-00-240-2146
Cord, nylon, type III, 550-lb
As required
4030-00-090-5354
Clevis, large
3
4030-00-678-8562
Clevis, medium
2
Link assembly:
T
wo-point, 3 3/4-in
9
5306-00-435-8994
Bolt, 1-in diam, 4-in long
18
5310-00-232-5165
Nut, 1-in, hexagonal
18
1670-00-003-1953
Plate, side, 3 3/4-in
18
5365-00-007-3414
Spacer, large
18
Lumber:
5510-00-220-6146
2- by 4-in
As required
5510-00-220-6148
2- by 6-in
As required
5510-00-220-6274
4- by 4-in
As required
5530-00-618-8073
Plywood, 3/4-in
5 sheets
Nail, steel wire, common,
5315-00-010-4659
8d
As required
5315-00-753-3883
10d
As required
5315-00-010-4666
40d
1670-00-753-3928
Pad, energy dissipating, honeycomb,
3- by
36- by
96-in
18 sheets
1670-01-487-5461
Static line assembly release awa y
1
Parachute:
Cargo:
1670-01-016-7841
G-11 D
3
Cargo extraction: (deployment parachute)
1670-00-040-8135
28-foot
1
Platform, dual row, 18-foot
1670-01-485-1654
Rail, DRA S
2
1670-01-486-1342
Roller Pad, DRA S
4
1670-01-486-1656
Panel Assembly, Main
9
4-40

 

 

 

 

 

 

 

 

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