4.  Captain’s and First Officer’s Seats (Fig. 2)
A.  Seats are opposite assemblies and include base, seat bottom, seat back, support linkage, inertia shoulder harness, crotch strap, and lap belt with rotary buckle; some airplanes have power actuation equipment.
B.  The base is bolted to the floor and supports the seat bottom and back.
C.  A metal pan forms main structure of seat bottom. A covered cushion is fastened to the pan.
D.  A metal frame forms main structure of seat back. A covered cushion is fastened to the frame. The back cushion is made of a buoyant material and is certified as an individual flotation device. It can be easily removed and used as a life vest. Angle of seat back can be adjusted independently of the bottom.
E.  The seat can be manually adjusted fore and aft, and up and down; angles of seat back and bottom can also be independently varied.
F.  On airplanes so equipped, electrical power is available for up and down adjustment but such adjustments can also be made manually.
G.  On airplanes with handwheels for seat lumbar adjustment, a stop bracket attached to P-18 panel prevents excessive aft movement of captain's seat back.
WARNING:  STOP BRACKET MUST REMAIN CORRECTLY INSTALLED TO ENSURE AGAINST UNSCHEDULED ACTUATION OF SWITCHES, CAUSED BY INTERFERENCE OF CAPTAIN'S SEAT.
5.  Lightshield
A.  The lightshield is under windshield and over main instrument panels.
B.  A glass fiber plastic hood and a sheet metal framework form main structure of lightshield. A crash pad is cemented to the aft edge of the hood. Three small instrument panel sections are fastened to the middle of aft edge. A check list holder is fastened to top of hood. Lamp sockets and reflectors are fastened to underside of lightshield to illuminate instrument panels. Top of lightshield has a coat of nonreflecting coating.
6.  Forward and Aft Electronic Control Panels
A.  The forward electronic control panel is forward of control stand. Panel face slopes somewhat with respect to horizontal plane. Several small panel sections and weather radar indicator make up the panel.
B.  The aft electronics control panel is on top of control stand and aft of throttle levers. Panel face lies in horizontal plane. Several small panel sections make up the panel.
C.  Lightplates form the faces of the panel sections that are not blank. Each section is held to the support framework by quick-release fasteners.
5C8 
25-11-0 Page 4  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  Jun 20/85 

EFFECTIVITY
 AIRPLANES WITH
WEBER CREW SEATS

5C8  Captain's and First Officer's Seats 
Oct 20/86  Figure 2 (Sheet 1)  25-11-0 
Page 5 

BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

EFFECTIVITY
AIRPLANES WITH IPECO LIGHTWEIGHT SEATS

Captain's and First Officer's Seats  502 
25-11-0  Figure 2 (Sheet 2)  Oct 20/85 
Page 6 

BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

CAPTAIN'S AND FIRST OFFICER'S SEATS - REMOVAL/INSTALLATION
1.  Remove Seat (Airplanes with Weber crew seats, Fig. 401)
A.  Adjust seat to lowest position. 
B.  Remove two seat attachment screws from each seat attachment fitting. 
C.  Lift seat from seat attachment fittings. 
2.  Install Seat (Airplanes with Weber crew seats, Fig. 401)
A.  Put seat in position with seat base lugs resting in seat attachment fitting recesses.
B.  Install two seat attachment screws in each seat attachment fitting and tighten cap nuts.
NOTE:  If installed seat is binding or hard to operate, loosen floor attachment bolts and retighten bolts in an alternate diagonal pattern while operating seat in fore and aft directions.
C.  Check that seat is operable in all directions.
3.  Remove Seat (Airplanes with IPECO lightweight seats, Fig. 401)
A.  Remove forward stop blocks from floor tracks.
B.  With horizontal lock control released, move seat forward to disengage front claw plate and roller assemblies from floor tracks.
C.  Remove bolts and detach rear claw plate and roller assemblies; remove seat.
D.  Remove rear claw plate and roller assemblies from floor tracks and attach to seat.
E.  Install forward stop blocks to floor tracks.
4.  Install Seat (Airplanes with IPECO lightweight seats, Fig. 401)
A.  Remove forward stops from floor tracks.
B.  Remove bolts and detach rear claw plate and roller assemblies from seat.
C.  Engage rear claw plate and roller assemblies with floor track.
　
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