R (1) Normal operation
R When the INT LT/DOME switch 14LE is in the BRT position:
R - the dome light in 453VU is supplied with 28VDC from busbar 601PP
R through circuit breaker 3LE on the rear C/B panel 122VU.
R - the dome light in 452VU is supplied with 28VDC from essential
R busbar 401PP through circuit breaker 1LE on the overhead C/B panel
R 49VU.
R When the switch is in the DIM position the light intensity decreases.
R In the BRT position, the lights are supplied in parallel and in the
R DIM position they are supplied in series by groups of two.
R (2) Emergency lighting
R If the busbar 601PP is lost, only the dome light in 452VU on the
R cockpit right side remains on. It is supplied by essential busbar
R 401PP through circuit breaker 1LE.
R In this configuration, the 3 positions: OFF, DIM and BRT of the
R switch 14LE are operational.
B. Console Lighting (Ref. Fig. 004) Four lights are used for the lighting of each console (3 for the console itself and 1 for the briefcase). The associated floor lighting consists of four lights fitted at the base of the Captain and First Officer seats.
General Illumination - Dome Light
Figure 003
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General Illumination - Side Console Lighting and Cockpit Outlets
Figure 004
(1)
Captain console and floor lighting The CONSOLE/FLOOR switch 15LE with 3 positions: OFF - DIM - BRT controls the 28VDC supply to these lighting systems. The switch is located on the Captain lighting/loud speaker control panel 301VU. The normal busbar 103PP supplies the 8 lights through the circuit breaker 5LE located on the rear circuit breaker panel 122VU.
(2)
First Officer console and floor lighting The CONSOLE/FLOOR switch 16LE with 3 positions: OFF - DIM - BRT controls the 28VDC supply to these lighting systems. The switch is located on the F/O lighting/loud speaker control panel 500VU. The normal busbar 204PP supplies the 8 lights through the circuit breaker 4LE located on the rear circuit breaker panel 122VU.
C. Instrument Panel Lighting (Ref. Fig. 005) Three lights 36LE (First Officer), 37LE (Captain) and 38LE (center) provide the ambient lighting of the Captain, First Officer and center main instrument panels. They are installed under the glareshield and illuminate only the instruments and the placards located on four zones of the main instrument panels:
-
2 zones at the ends of the main instrument panels, 301VU and 500VU,
-
2 zones on the center instrument panel: One on the left side which has the emergency items of equipment, one on the right side which has equipments such as the landing gear control lever, clock, the landing gear control and indicating panel 402VU etc.
The single control dual rheostat 35LE located on the center pedestal on the FLOOD LT/INTEG LT panel 111VU controls these lights:
-The first rheostat controls:
The brightness of the halogen lamps of the F/O main instrument-panel
light 36LE:
-the section of the center instrument panel light 38LE which illuminates the right zone. The normal busbar 103PP supplies the lamps with 28VDC through circuit breaker 2LE located on rear circuit breaker panel 122VU.
-The second rheostat controls: The brightness of the halogen lamps of the Captain main instrument panel light 37LE and the section of the center instrument panel light 38LE which illuminates the left zone (standby equipment).
The rheostat of the F/O main instrument-panel light controls the intensity of the six halogen lamps of the F/O main instrument-panel. The rheostat of the Captain main instrument-panel light controls the intensity of the six halogen lamps of the Captain main instrument-panel.
General Illumination - Instrument Panel Lighting and Reading Lights
Figure 005
D. Reading Lights (Ref. Fig. 005)
(1)
Captain and First Officer map table lights (41LE and 42LE) The two map table lights are fitted on the upright of the side windows of the cockpit. They swivel and illuminate the sliding tables of the Captain and First Officer and the map tables located on the sliding windows. Each map table light has a 4.8W, 28V incandescent light. The rheostats (39LE and 40LE) control these lights. Each map table light has a rheostat which controls the light.
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