EFFECTIVITY
AIRPLANES WITH WEBER CREW SEATS
Captain's and First Officer's Seat Installation 5C8
25-11-11 Figure 401 (Sheet 1) Feb 20/86
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
EFFECTIVITY
AIRPLANES WITH IPECO LIGHTWEIGHT CREW SEATS
508 Captain's and First Officer's Seat Installation
Feb 20/86 Figure 401 (Sheet 2) 25-11-11
Page 403
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
LIGHTSHIELD - REMOVAL/INSTALLATION
1. Remove Lightshield (Fig. 401)
A. Open No. 1 BACKGRD and FLUOR or STBY and FLUOR circuit breakers as applicable (P6).
B. On some airplanes, remove AFCS mode control panel (Ref 22-11-341 R/I).
C. On other airplanes, remove autopilot mode control panel (Ref 22-11-191 R/I) and flight director control panel (Ref 34-26-51 R/I).
D. Remove lower covers.
(1)
Remove screws that attach lower cover.
NOTE: The screws are not the same and should be identified so that each one can be reinstalled correctly.
(2)
Move lower cover to clear brackets and wiring.
E. Disconnect cap connectors and tag electrical wiring.
F. Support lightshield and remove lightshield fastening screws.
G. Raise rear edge of lightshield to gain access to window antifogging ducts. Disconnect antifogging ducts from nozzles.
H. Lift lightshield clear of supporting structure.
I. Secure shimming washers on outboard brackets for installation, if necessary.
2. Install Lightshield (Fig. 401)
A. Position lightshield with rear edge of lightshield raised. Connect windshield antifogging ducts to nozzles.
B. Lower lightshield in place and install lightshield fastening screws.
C. Check that lightshield height dimension is as shown in A-A, Fig. 401.
D. If required, adjust lightshield height by shimming with washers between support bracket and lightshield as in Fig. 401.
(1) After quantity of washers has been determined, bond washers together and to support bracket using Epocast 8543 adhesive, allowing 15 minutes to cure before installing screw.
E. Connect electrical wiring.
F. Install lower covers with screws as marked in steps 1.B.(1) and (2).
G. Close circuit breakers on P6 opened in par. 1.A.
H. Turn BACKGROUND lighting control, on captain's lower main instrument panel, clockwise and check for functioning of lightshield lamps.
505
Jun 20/89 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 25-11-21 Page 401
Lightshield Installation 501
25-11-21 Figure 401 Oct 20/85
Page 402
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
SEAT ADJUSTMENT SIGHT GUIDE - MAINTENANCE PRACTICES
1. Removal/Installation Seat Adjustment Sight Guide
A. Remove Sight Guide (Fig. 201)
(1)
Remove nuts from windshield bolts securing sight guide.
(2)
Remove sight guide. Note number and location of alignment shims.
B. Install Sight Guide (Fig. 201)
(1)
Install sight guide with needed shim (Fourth bolt down from top of windshield).
(2)
Tighten nut on windshield bolts to 20 to 25 pound-inches (40 pound-inches maximum).
2. Inspection/Check Seat Adjustment Sight Guide
A. Ensure airplane is level (Ref 8-11-0).
B. Attach one end of string or filament line to center of protractor.
C. Locate protractor as shown in Fig. 201. Pull string taut and secure free end to floor midway between right and left hand seat tracks in mid-passenger cabin area.
D. Check that angles A and B shown in Fig. 201 are equal within ±1/2° and that sight guide is level.
E. Adjust sight guide angular alignment by adding or removing shims as required.
508
Feb 20/84 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 25-11-31 Page 201
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