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 1. General
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 The external lights provide the following illuminations:

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lights to illuminate the runway and the taxiway,

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lights to illuminate the wing leading edges and the engine nacelles,

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lights to give an indication of the aircraft position and to reduce
 possible collision in the air or on the ground.

 2. System Description
__________________ The toggle switches on the overhead panel 25VU control the external lights as follows:
 A. Taxi and Takeoff Lights (Ref. Fig. 001) The taxi and takeoff lights provide illumination of the runway and the taxiway. Two lights are installed on the nose landing gear. The 400 W light is switched on during the taxi phase. Both the 400 W and the 600 W light are switched on during the takeoff phase. A three position switch 4LR controls the lights.
 B. Runway Turnoff Lights (Ref. Fig. 001) The runway turnoff lights provide illumination of the lateral areas of the runway. Two lights are installed on the nose landing gear. The toggle switch 2LC controls the lights.
 C. Wing and Engine Scan Lights (Ref. Fig. 001) Two lights are installed, one on each side of the forward fuselage. They illuminate the engine air intakes and the wing leading edges. It is possible to examine these areas in flight; for example, to determine the build up of ice. The toggle switch 2LX controls the lights.
 D. Navigation Light (Ref. Fig. 002) The dual navigation light system indicates the aircraft position and direction. It has:
 -
a red color light 9LA, incorporating two lamps, installed in the left-hand wing-tip.

 -
a green color light 10LA, incorporating two lamps, installed in the right-hand wing-tip.

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a white light 15LA, incorporating two lamps installed on the tail cone at the extreme aft of the aircraft.

 External Lights - Component Location
 Figure 001 (SHEET 1)
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 External Lights - Component Location
 Figure 001 (SHEET 2)
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 External Lights - Component Location
 Figure 001 (SHEET 3)
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 INTENTIONALLY BLANK

 1 1

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 External Lights - Component Location
 Figure 002 (SHEET 1)
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 External Lights - Component Location
 Figure 002 (SHEET 2)
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 A three position switch, 3LA on the panel 25VU, controls the lights.
 E. Landing Lights (Ref. Fig. 003) The landing light system provides lighting to illuminate the runway when the aircraft lands at night. Two landing lights 7LB and 8LB are installed one on the underside of each wing. Each light has a separate control switch 5LB and 6LB. They can be extended at all aircraft speeds.
 F. Anticollision/Beacon Lights (Ref. Fig. 002) Two anticollision/beacon lights are installed, 7LV on the top and 6LV on the bottom of the aircraft fuselage. The anticollision/beacon lights are high intensity red discharge lamps. Each lamp is supplied from an individual power unit. The anticollision/beacon lights flash at approx. 60 flashes per minute, when the BEACON switch 2LV is in the ON position. Three strobe lights are installed, two at each wing tip on the leading edges 16LV and 17LV and one on the tail cone 19LV. The strobe lights are high intensity white lights synchronized to operate alternately with the anticollision/beacon light. The forward facing strobe lights flash at approx. 120 flashes per minute and the rearward facing strobe light flashes at approx. 60 flashes per minute. This occures when the STROBE switch 11LV is either in the ON or AUTO position.
 G. Logo Lights (Ref. Fig. 002) Two logo lights, 3LY in the left and 4LY in the right, are installed in the horizontal stabilizers. They light up the airlines logo on the fin when:
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the aircraft is in the landing phase of the flight,

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the aircraft is taxiing,

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the aircraft is in the take off phase of the flight. A three position switch, 3LA on the panel 25VU, controls the logo lights together with the navigation lights.
　
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