(2)
Open EMERGENCY EXIT PWR circuit breaker on panel P18. Check that all emergency exit, overwing lights (if installed) and escape slide lights (if installed) illuminate. Leave circuit breaker open until lights are extinguished.
(a) Verify emergency exit, overwing lights (if installed) and escape slide lights (if installed) remain illuminated for at least 15 minutes.
(3)
Close EMERGENCY EXIT PWR circuit breaker on panel P18. Check that emergency exit, overwing lights (if installed) and escape slide lights (if installed) extinguish.
(4)
Set EMER EXIT LIGHTS switch on forward overhead panel to OFF.
CAUTION: DO NOT LEAVE EMERGENCY LIGHTS OPERATING AFTER COMPLETION OF TESTS. PRIOR TO REMOVING POWER FROM AIRPLANE, CHECK THAT POSITION OF THE EMERGENCY EXIT LIGHTS SWITCH ON THE FORWARD OVERHEAD PANEL IS OFF.
(5)
Charge batteries by providing electrical power for at least 10 hours.
(6)
When batteries are fully charged, remove electrical power if no longer required (Ref 24-22-0, MP).
501
Jan 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 33-51-11 Page 503
EMERGENCY EXIT OVERWING LIGHTS - MAINTENANCE PRACTICES
EFFECTIVITY
ALL EXCEPT ATI INTERIOR
1. General
A. The overwing lights are composed of two separate units: the light assembly and the battery pack assembly. Lamps in the light assembly are accessible from outside the airplane.
2. Relamp Exit Overwing Lights
A. Remove lens retaining screws (Fig. 201).
B. Carefully pry loose and remove lens assembly and gasket (if installed).
C. Remove screws on lamp retainer on the forward overwing exit lights, and press down on lamp and turn to disengage bayonet lamp from retainer on the aft lights.
D. Remove lamp.
E. Clean light assembly with a clean dry cloth.
F. Install lamp, secure with retainer and screws on forward overwing exit lights. On aft overwing lights press down on lamp and turn to engage bayonet lamp in retainer.
G. Test lamp.
(1) Momentarily set emergency lights switch on either pilots' overhead or aft attendant's panel to ON then return switch to prior setting. Check that lamp comes on and goes off.
CAUTION: RETURN SWITCH TO OFF POSITION AS SOON AS POSSIBLE TO CONSERVE BATTERIES.
H. Install lens assembly and gasket with four screws.
5C8
Jun 20/85 33-51-21 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Emergency Exit Overwing Lamp Installation 535
33-51-21 Figure 201 Feb 15/72
Page 202
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
EMERGENCY EXIT OVERWING LIGHTS - MAINTENANCE PRACTICES
EFFECTIVITY
ATI INTERIOR
1. General
A. The overwing lights are composed of two separate units: the light assembly and the battery pack assembly. Lamps in the light assembly are accessible from outside the airplane.
2. Relamp Exit Overwing Lights
A. Remove lens retaining screws (Fig. 201).
B. Carefully pry loose and remove lens assembly and gasket (if installed).
C. Remove screws on lamp retainer on the forward overwing exit lights, and press down on lamp and turn to disengage bayonet lamp from retainer on the aft lights.
D. Remove lamp.
E. Clean light assembly with a clean dry cloth.
F. Install lamp, secure with retainer and screws on forward overwing exit lights. On aft overwing lights, press down on lamp and turn to engage bayonet lamp in retainer.
G. Test lamp.
(1) Momentarily set emergency lights switch on either pilots' overhead or aft attendant's panel to ON, then return switch to prior setting. Check that lamp comes on and goes off.
CAUTION: RETURN SWITCH TO OFF POSITION AS SOON AS POSSIBLE TO CONSERVE BATTERIES.
H. Install lens assembly and gasket with four screws.
Oct 20/84 33-51-22 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Emergency Exit Overwing Lights 5C9
33-51-22 Figure 201 Oct 20/83
Page 202
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
EMERGENCY EXIT OVERWING LIGHT BATTERY PACK - MAINTENANCE PRACTICES
1. General
A. This procedure provides the steps necessary to replace batteries in the overwing emergency exit light battery packs. The packs are mounted behind access panels on the aft cargo compartment sidewalls (station 727A, right and left sides).
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