External Lights - Component Location
Figure 003
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NAVIGATION LIGHTS - DESCRIPTION AND OPERATION
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1.
General
_______ The Navigation Light system gives an external, visual indication of the position of the aircraft and its direction of flight.
2.
Component Location
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(Ref. Fig. 001)
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF. -------------------------------------------------------------------------------
9LA LT-NAVIGATION, L WING TIP 534 534 33-41-11 10LA LT-NAVIGATION, R WING TIP 634 634 33-41-11 13LA XFMR-TAIL NAVIGATION LIGHT 317 317AL 33-41-16 15LA LT-NAVIGATION, TAIL 317 317 33-41-15
3. System Description
__________________ (Ref. Fig. 001) A forward-facing navigation light assembly is installed at the leading edge of each wing tip. A rearward-facing navigation light assembly is installed on the tail cone, below the APU exhaust. Each light assembly has a different colored lens:
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the left wing-tip navigation light 9LA has a red lens
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the right wing-tip navigation light 10LA has a green lens
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the tail navigation light 15LA has a clear lens.
The navigation lights are controlled by the toggle switch 3LA which is installed on the overhead panel 25VU in the cockpit. The switch has three positions, which are identified NAV & LOGO 2/1/OFF.
4.
Power Supply
____________ (Ref. Fig. 002) The SERVICE BUS 2, 216XP supplies the navigation light systems 1 and 2 with 115V AC 400Hz. The power is supplied to each system through the related circuit breakers 1LA and 2LA. These circuit breakers are installed on the panel 122VU in the cockpit. Relays 6LA and 7LA connect the supply to the step-down transformers of the related navigation lights. These relays are installed on the panel 103VU.
5.
Interface
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Navigation Lights - Component Location
Figure 001
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Navigation Lights - Schematic
Figure 002
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6. Component Description_____________________ (Ref. Fig. 001)
A. Forward-Facing Navigation Light 9LA(10LA)
Each forward-facing navigation light assembly contains two light units
which operate independently. Each light unit contains:
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a step-down transformer
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a 28V AC, 50 WATT, halogen lamp.
B. Rearwards-Facing Navigation Light 15LA
The rearwards-facing navigation light assembly contains two light units which operate independently. Each light unit has a 12V AC, 25 WATT, quartz lamp. The related step-down transformer assembly 13LA contains two step-down transformers, which operate independently to supply their related light unit. This step-down transformer assembly is installed near the navigation light assembly, in the tail cone.
7. Operation/Control and Indicating________________________________ (Ref. Fig. 001) With the switch 3LA set to position 1, the 115V AC SERVICE BUS 2, 216XP supplies power through:
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the circuit breaker 1LA
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the switch 3LA (to energize the relay 6LA)
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the relay 6LA to the step-down transfomers of the related navigation
lights.
The step-down transformers in the wing-tip navigation light assemblies supply 28V AC to the related lamp. The lamp comes on. Each step-down transformer in the step-down transformer assembly 13LA supplies 12V AC to its related tail navigation light. The lamp comes on. With the switch 3LA set to position 2, the operation is almost the same, but this time the power is supplied through the circuit breaker 2LA and the relay 7LA.
With the switch 3LA set to OFF:
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the relays 6LA and 7LA are de-energized
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the lamps go off.
NAVIGATION LIGHTS - DEACTIVATION/REACTIVATION_____________________________________________
TASK 33-41-00-040-001
Deactivation of the Glazing Panel of the Wing-Tip Navigation Light
WARNING : PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU_______ START A TASK ON OR NEAR: - THE FLIGHT CONTROLS - THE FLIGHT CONTROL SURFACES - THE LANDING GEAR AND THE RELATED DOORS - COMPONENTS THAT MOVE.
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