Seat Adjustment Sight Guide Installation  508 
25-11-31  Figure 201  Oct 20/83 
Page 202 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

OBSERVERS' EQUIPMENT - DESCRIPTION AND OPERATION
1. General
A.  The first observer's station is directly in front of the control cabin door. A folding seat and an auxiliary panel make up the first observer's equipment.
2.  First Observer's Seat
A.  The unfolded seat is in the control cabin entryway just in front of the control cabin door (Fig. 1). The right-hand wall of the entryway has a recess into which the seat can be folded. The seat must be folded to allow persons to enter or leave the control cabin. The main elements of the seat are the seat bottom, the seat back and the safety harness.
B.  The seat bottom is a cushion fastened to a metal framework. A continuous hinge on the right side fastens the seat bottom to the wall of the control cabin entryway. There are two retractable pins on the left side of the seat bottom. The pins fit into holes in latch plates on the left wall of the control cabin entryway and thus hold the seat bottom in its unfolded position. The seat bottom cushion is made of a buoyant material and it is certified as an individual flotation device. It can be easily removed and used as a life vest.
C.  The seat back is hinged to the seat bottom. The back must be folded down onto the seat bottom before the bottom is folded into the recess in the entryway wall. The seat back is formed of a metal framework with an upper and a lower cushion attached to it. The upper cushion can slide up and down with respect to the lower cushion. There is a retractable pin at each end of the upper cushion. The pins fit into holes in latch plates on the walls of the control cabin entryway and thus hold the seat back upright.
D.  The seat is furnished with fixed shoulder harness and a lap belt with a rotary buckle. The lap belt is fastened to the seat bottom and the shoulder straps are fastened to the upper cushion support framework on the seat back.
550 
Nov 01/74  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-14-0 Page 1 

First Observer's Seat  503 
25-14-0Page 2   Figure 1 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Aug 15/67 

3.  First Observer’s Auxiliary Panel
A.  The first observer’s auxiliary panel is on the right-hand wall of the control cabin entryway. An upper and a lower section make up the panel. Both sections are held to the support structure by quick-release fasteners.
B.  Oxygen flow regulating equipment is installed in the upper section. A lightplate forms the face of the upper section. The lower section is blank.
503 
Aug 15/67  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-14-0 Page 3 

FIRST OBSERVER'S SEAT - REMOVAL/INSTALLATION
1.  Remove Seat (Fig 401).
A.  Put seat in position shown in Fig. 401 (i.e. with seat out of recess and seat back folded down).
B.  Remove five countersunk-head bolts that fasten hinge to load control center structure. Support right side of seat while removing bolts.
C.  Lift seat from its place.
2.  Install Seat (Fig. 401).
A.  Hold seat in place.
B.  Install five countersunk-head bolts.
500 
May 15/67  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  25-14-11 Page 401 

First Observer's Seat Installation  500 
25-14-11Page 402   Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Aug 15/67 

CONTROL CABIN STOWAGE PROVISIONS - DESCRIPTION AND OPERATION
1. General
A.  The control cabin has provisions for stowing crewmembers' coats and hats, maps, manuals, the pilots' flight kits and spare bulbs.
B.  There is space to the left outboard of the first observer's seat for stowing crewmembers' coats. A coat hanger rod which is about 8 inches long is just under the second observer's oxygen mask shelf. The rod's aft end is fastened to the control cabin aft bulkhead and the forward end is fastened to another partition.
C.  There are four hat holders on the right-hand wall of the control cabin entryway.
D.  There are four mapholders, one being attached on each side to the lower forward end of the control stand, and one in the center section at each pilots' control wheel.
E.  Accommodations for stowing manuals are provided aft of the first officer’s flight kit stowage space.
F.  There is space outboard and slightly aft of each pilots' seat for stowing the pilots' flight kits. A strap at each stowage space holds the kit to the floor and against the outboard wall.
　
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