Method 1 (Preferred) Inboard Landing Light Adjustment  501 
33-42-31  Figure 501 (Sheet 2)  Feb 20/87 
Page 504 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

508  Method 2 (Alternate) Inboard Landing Light Adjustment 
Feb 20/87  Figure 502 (Sheet 1)  33-42-31 
Page 505 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

RUNWAY TURNOFF TAXI LIGHTS - MAINTENANCE PRACTICES
1.  General
A.  The following procedure is for relamping the runway turnoff taxi lights. Adjustment after relamping is usually not required unless the mount or the adjustment screws have been disturbed.
B.  The landing and runway turnoff light lens assembly is sealed to keep out water and fuel vapors (Ref 33-42-21, R/I).
2.  Equipment and Materials
A.  Compound, Standard Wiring Practices Manual (SWPM), 20-30-00
B.  Cleaning Solvent - Keytone
C.  Teflon Tape - Permacel No. 422/4220
D.  Lock Assembly, Flight Controls - F80049-1, -2
3.  References
A.  MM 33-42-21 R/I Inboard Landing and Runway Turnoff Light
B.  MM 27-51-0 MP Trailing Edge Flaps
C.  MM 27-81-0 MP Leading Edge Flaps and Slats
D.  Standard Wiring Practices Manual (SWPM), 20-30-00
4.  Prepare Runway Turnoff Taxi Light for Relamping (Fig. 201)
A.  Retract and lock leading edge flaps as follows:
(1)  
Install flight controls lock on leading edge devices shutoff valve at standby hydraulic module (Ref 27-81-0, MP).

(2)  
Install flight controls lock on trailing edge bypass valve (Ref 27-51-0, MP).

(3)  
Check that alternate flaps arm switch is in OFF position and tag switch DO NOT OPERATE.

WARNING:  INSTALL FLIGHT CONTROLS LOCKS WHEN MAINTENANCE IS BEING PERFORMED IN THE WING LEADING EDGE AREA. FLAPS ARE FAST ACTING AND CAN CAUSE SERIOUS INJURY TO PERSONNEL.
B.  Remove landing and runway turnoff light lens assembly (Ref 33-42-21, R/I).
NOTE: Restrain light cover to keep it from falling and breaking.
C.  Open applicable runway turnoff light circuit breaker on P18-3 panel.
5.  Relamp Runway Turnoff Taxi Light (Fig. 201)
A.  Remove outer retainer by removing three retainer screws.
NOTE: Do not turn adjustment screws.
B.  Remove lamp from inner retainer.
C.  Disconnect wires from screw terminals on lamp.
517 
Feb 01/95  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  33-42-41 Page 201 

Runway Turnoff Lights Relamping  515 
33-42-41  Figure 201  Jan 20/82 
Page 202 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

D.  Remove gasket from lamp and install gasket on replacement lamp.
NOTE:  To install gasket, the gasket should be wiped clean with Keytone, or equivalent cleaning solvent. Then holding one end of gasket on rim of lamp, wrap gasket around lamp (keeping sufficient tension to cause gasket to form itself to the contour of the lamp) until ends of gasket are overlapped. If required, cut off excess gasket material so the overlap is approximately 1 inch. A piece of teflon tape may be used to retain overlapping gasket in position so that gasket will not come loose during lamp installation.
E.  Connect wires to screw terminals on replacement lamp.
F.  Seal the electrical terminals for a fuel vapor area (SWPM 20-30-00).
WARNING:  MAKE SURE YOU SEAL EACH BARE ELECTRICAL CONNECTION TO PREVENT AN EXPLOSION OF THE FUEL FUMES. AN EXPLOSION CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
G.  Align locating lug on lamp with slot in inner retainer so top of lamp is properly positioned. Set lamp on retainer.
H.  Place outer retainer on lamp, aligning holes with holes retainer, and install three retainer screws.
6.  Restore Airplane to Normal Configuration
A.  Close applicable runway turnoff taxi light circuit breaker on P18-3 panel.
B.  Test runway turnoff taxi lights.
(1)  
Provide electrical power.

(2)  
On forward overhead panel, actuate runway turnoff taxi light switch to ON; check that both runway turnoff taxi lights come on and illuminate symmetrical areas; and return runway turnoff taxi light switch to OFF.

CAUTION:  DO NOT LEAVE LIGHTS ON MORE THAN 5 MINUTES. ALLOW AT LEAST 5 MINUTES BEFORE TURNING ON AGAIN.

(3)  
Remove electrical power if no longer required.
　
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