A Auxiliary Seat For Third; Forward Facing Utility Seats; Side Facing Military Type Utility Seats; 2-38A - De Havilland DHC-4 CARIBOU Maintenance Manual

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2.39A AUXILIARY SEAT FOR THIRD CREW
MEMBER
To special order only, a folding auxiliary
seat can be provided in the flight compartment for
use by a third
crewm.~mber
during flight only. See
figure 2-13A. The seat has a tubular seat frame
pivoted to brackets on the flight compartment/
cabin door frame and supported by telescopic
rods also attached to brackets on the door frame.
A length of nylon material is sewed to the front of
the seat,frame and to a tube assembly which bears
in brackets at the top of the door frame. When in
use, the seat swings down and the two telescopic
rods are fully compressed. In the stowed position
the telescopic struts are extended, the seat
·material is rolled up and the seat is retained in
position by a nylon material stowage panel which
passes under the front of the seat frame and is
secured by Velcro tape to the top ofthe seat back.
A lap-type seat belt is secured to the two lower
seat attachment brackets.
2.40 FORWARD FACING UTILITY SEATS
Forward facing utility seats, equipped
with lap type safety belts, may be installed in the
cabin. Provision is made for installing up to ten
double seats on the right side of the cabin, and up
to ten single seats on the left side of the cabin.
The seats are hinged to the cabin walls, and may
be folded and stowed against the walls when not
in use. Refer to Aircraft Loading Handbook for
installation and stowage of utility seats.
2.41 SIDE FACING MILITARY TYPE UTILITY
SEATS
Up to 16 two-man side facing military
type utility seats, available on special order, may
be installed along each side of the cabin. Each
seat assembly consists of a tubular m.~tal front-
edge member, spreader bars and legs, a nylon
fabric seat, and nylon back webbing, and attaches
to floor fittings and to upper and lower rails on
the cabin wall. Each seat is linked to adjacent
seats by male and female tubular couplings, slide
fasteners in the seat fabric and snap fasteners in
the back webbing. The seats may be folded up
against the cabin wall or may be rolled up and
secured by. straps by folding both leg spreader
bars (which clip onto the lower wall support tubes)
and detaching the seat back from the upper tube.
Each seat is equipped with a seat belt attached
by quick.release fasteners to rings on the fittings
which also clamp the lower seat support rails to
the structure. These rings and clamps may be
located 20 or 25-inches apart to suit passenger
seating arrangement. Refer to Aircraft Loading
Handbook for installation and stowage of side
facing seats.
Revised 15 July 1969
Part 2
Paragraphs 2. 39A to 2.44
2.42 AIRLINE TYPE SEATS
Airline, non-folding, semi-reclining up-
holstered type seats equipped with lap type
safety belts, .available on special order, provide
accommodation for up to 24 passengers. The
layout consists of eight single seats on the left
and eight double seats on the right of the cabin.
For the airline configuration a toilet and a coat
rack is normally installed at the front of the
cabin. An extra double seat and an extra single
seat may be installed in lieu of the toilet and
coat rack.
2.43 LITTERS
Special order provision can be made for
the installation of 6, 12, or 14 standard litters. For
the six litter arrangement, three attachments are
located on each side in the center part of the
cabin. For the 12 and 14 arrangement, 3 or 4
additional attachments are provided on each side in
the aft part of the cabin. All but the lowest litters
are supported on each side by quickly-removable
clamps, carried by slotted fittings attached to the
cabin wall, and by straps hanging from roof hooks.
The lower litters are supported on large machined
support fittings attached to the floor and to the
wall near the inters ection of the wall and floor. The
lower ends of the straps supporting the upper
litters attach to the floor supporting fitting. The
support straps, wall attachment clamps, and floor
support fittings are stowed in litter kit bags pro-
vided. Refer to Aircraft Loading Handbook for in ..
stallation and loading of litters.
2.44 CARGO TIE-DOWN FITTINGS
Cargo tie-down fittings may be installed
in the cabin floor and walls. The floor tie-down
fittings attach to studs recessed in three longi-
tudinal channels ofthe floor support structure. The
studs are spaced at 2-1/2- inch intervals in the
channels so that the tie-down fittings can be lo-
cated to suit the cargo. The studs will withstand
an ultimate loading of 5,000 pounds in all positions
with the exception of the 12 studs between stations
231.72 and 297.61, which will withstand 2,000
pounds. The wall tie-down fittings can be attached
by nuts to fittings in any of 18 locations on each
wall and at floor level in three locations in each
wall. The fittings in the wall will withstand an
ultimate loading of 2,000 pounds, and the fittings
at floor level 10,000 pounds. When Mod 4/1129
is embodied, 2000-pound tie-down fittings in the
walls are deleted and eight additional 5, 000 -pound
tie.down fittings are recessed into the outboard
edge of the floor at each side. To special order
I
only (M.,dification S.O.O. 4067), the floor cargo
tie-down fittings consist of three rows of 5000 lb
2-38A
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2.39A AUXILIARY SEAT FOR THIRD CREW
MEMBER
To special order only, a folding auxiliary
seat can be provided in the flight compartment for
use by a third
crewm.~mber
during flight only. See
figure 2-13A. The seat has a tubular seat frame
pivoted to brackets on the flight compartment/
cabin door frame and supported by telescopic
rods also attached to brackets on the door frame.
A length of nylon material is sewed to the front of
the seat,frame and to a tube assembly which bears
in brackets at the top of the door frame. When in
use, the seat swings down and the two telescopic
rods are fully compressed. In the stowed position
the telescopic struts are extended, the seat
·material is rolled up and the seat is retained in
position by a nylon material stowage panel which
passes under the front of the seat frame and is
secured by Velcro tape to the top ofthe seat back.
A lap-type seat belt is secured to the two lower
seat attachment brackets.
2.40 FORWARD FACING UTILITY SEATS
Forward facing utility seats, equipped
with lap type safety belts, may be installed in the
cabin. Provision is made for installing up to ten
double seats on the right side of the cabin, and up
to ten single seats on the left side of the cabin.
The seats are hinged to the cabin walls, and may
be folded and stowed against the walls when not
in use. Refer to Aircraft Loading Handbook for
installation and stowage of utility seats.
2.41 SIDE FACING MILITARY TYPE UTILITY
SEATS
Up to 16 two-man side facing military
type utility seats, available on special order, may
be installed along each side of the cabin. Each
seat assembly consists of a tubular m.~tal front-
edge member, spreader bars and legs, a nylon
fabric seat, and nylon back webbing, and attaches
to floor fittings and to upper and lower rails on
the cabin wall. Each seat is linked to adjacent
seats by male and female tubular couplings, slide
fasteners in the seat fabric and snap fasteners in
the back webbing. The seats may be folded up
against the cabin wall or may be rolled up and
secured by. straps by folding both leg spreader
bars (which clip onto the lower wall support tubes)
and detaching the seat back from the upper tube.
Each seat is equipped with a seat belt attached
by quick.release fasteners to rings on the fittings
which also clamp the lower seat support rails to
the structure. These rings and clamps may be
located 20 or 25-inches apart to suit passenger
seating arrangement. Refer to Aircraft Loading
Handbook for installation and stowage of side
facing seats.
Revised 15 July 1969
Part 2
Paragraphs 2. 39A to 2.44
2.42 AIRLINE TYPE SEATS
Airline, non-folding, semi-reclining up-
holstered type seats equipped with lap type
safety belts, .available on special order, provide
accommodation for up to 24 passengers. The
layout consists of eight single seats on the left
and eight double seats on the right of the cabin.
For the airline configuration a toilet and a coat
rack is normally installed at the front of the
cabin. An extra double seat and an extra single
seat may be installed in lieu of the toilet and
coat rack.
2.43 LITTERS
Special order provision can be made for
the installation of 6, 12, or 14 standard litters. For
the six litter arrangement, three attachments are
located on each side in the center part of the
cabin. For the 12 and 14 arrangement, 3 or 4
additional attachments are provided on each side in
the aft part of the cabin. All but the lowest litters
are supported on each side by quickly-removable
clamps, carried by slotted fittings attached to the
cabin wall, and by straps hanging from roof hooks.
The lower litters are supported on large machined
support fittings attached to the floor and to the
wall near the inters ection of the wall and floor. The
lower ends of the straps supporting the upper
litters attach to the floor supporting fitting. The
support straps, wall attachment clamps, and floor
support fittings are stowed in litter kit bags pro-
vided. Refer to Aircraft Loading Handbook for in ..
stallation and loading of litters.
2.44 CARGO TIE-DOWN FITTINGS
Cargo tie-down fittings may be installed
in the cabin floor and walls. The floor tie-down
fittings attach to studs recessed in three longi-
tudinal channels ofthe floor support structure. The
studs are spaced at 2-1/2- inch intervals in the
channels so that the tie-down fittings can be lo-
cated to suit the cargo. The studs will withstand
an ultimate loading of 5,000 pounds in all positions
with the exception of the 12 studs between stations
231.72 and 297.61, which will withstand 2,000
pounds. The wall tie-down fittings can be attached
by nuts to fittings in any of 18 locations on each
wall and at floor level in three locations in each
wall. The fittings in the wall will withstand an
ultimate loading of 2,000 pounds, and the fittings
at floor level 10,000 pounds. When Mod 4/1129
is embodied, 2000-pound tie-down fittings in the
walls are deleted and eight additional 5, 000 -pound
tie.down fittings are recessed into the outboard
edge of the floor at each side. To special order
I
only (M.,dification S.O.O. 4067), the floor cargo
tie-down fittings consist of three rows of 5000 lb
2-38A