5C9 Passenger and Lavatory Call LightsJun 20/84 Figure 1 33-25-03 Page 3/4BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
PASSENGER AND LAVATORY CALL LIGHTS - MAINTENANCE PRACTICES
EFFECTIVITY
ATI INTERIOR
1. General
A. The following procedures provide steps for relamping and testing.
2. Relamp Call Lights
A. Provide electrical power (Ref 24-22-0, MP).
B. Press switch/light on applicable PSU to turn corresponding call lights on.
C. Identify faulty lights and press switch/light on PSU to off.
D. Open PASS AND CREW CALL circuit breaker on P18-4 panel.
E. Remove call lights lens assembly.
F. Remove faulty lamp from lens and install new lamp.
G. Install lens assembly.
H. Close PASS AND CREW CALL circuit breaker on P18-4 panel.
I. Test call light(s).
3. Test Call Lights
A. Provide electrical power (Ref 24-22-0, MP).
B. Ensure PASS AND CREW CALL circuit breaker on P18-4 panel is closed.
C. Press lavatory call switch in lavatory.
D. Verify corresponding lavatory call lights are on, and a single high tone sounds.
E. Press lavatory call switch in lavatory a second time.
F. Verify corresponding lavatory call lights are off.
G. Press passenger call switch/light on PSU to on (lighted).
H. Verify corresponding call lights are on and a single high tone sounds.
I. Press passenger call switch/light on PSU to off (unlighted).
J. Verify corresponding call lights are off.
K. Remove electrical power if no longer required (Ref 24-22-0, MP).
Oct 20/84 33-25-03 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
TERMINAL MODULE - REMOVAL/INSTALLATION
EFFECTIVITY
Wide Body Look Interior
1. General
A. Terminal modules are mounted inside passenger service units, adjacent to the attendant call switches. The modules serve as a rapid wiring facility for variations in master call light and chime control configurations, and as a wiring point for the system blocking/steering diodes.
B. Removal of the terminal module is achieved by releasing unit from terminal rack and removing wire connections.
2. Equipment and Materials
A. Wire extraction Tool - CET 16/9 ITT Cannon, or equivalent
B. Thin-bladed tool
3. Remove Terminal Module (Fig. 401)
A. Open PASSENGER AND CREW CALL circuit breaker on P18 left load control center. Attach do-not-operate identifier.
B. Release two quick-release fasteners near each inboard corner of PSU or insert small rod (or similar device) in each inboard corner and push to release latches, as applicable (use care not to mar PSU surface), and lower PSU until lanyard is taut.
CAUTION: DO NOT LOWER PSU BEYOND VERTICAL POSITION. OPENING UNIT
OUTBOARD BEYOND VERTICAL MAY CAUSE DAMAGE.
C. Insert a thin-bladed tool between terminal module and terminal rack and depress spring retainer.
CAUTION: DO NOT PRY AGAINST TERMINAL RACK. PRYING MAY CAUSE SERIOUS DAMAGE TO RACK.
NOTE: Module will pop up slightly when released from spring retainer.
Nov 15/78 33-25-21 Page 401
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Terminal Module Installation 526
33-25-21Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 01/74
ATTENDANT CALL SWITCH - REMOVAL/INSTALLATION
EFFECTIVITY
Wide Body Look Interior
1. General
A. A single alternate action switch, mounted in the PSU's provides passengers with an attendant call facility. The switch is mounted from the underside of the PSU.
2. Remove Attendant Call Switch (Fig. 401)
A. Open PASSENGER AND CREW CALL circuit breaker on P18 circuit breaker panel.
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