TM 55-1520-240-23-7
9-60
LIGHTING SYSTEMS
(Continued)
9-60
NAVIGATION (POSITION) LIGHT SYSTEM WITH 67
Description
The navigation (position) lighting system includes three
normal position lights, dimming resistors, a switch in
the cockpit overhead panel, and on aircraft with 67 , a
remote switch in the aft cabin. The red position light is
on the left pod at sta. 242. The green position light is
on the right pod at sta. 242. The white position light is
on the tail at sta. 627. Dc power is connected to the
lights through the POS EXT LTG switch on the overhead
panel which also controls their brightness. The remote
AFT POS LIGHT switch at sta. 534 on aircraft with 67 ,
provides control of the aft or tail position light.
Operation
1.
Power for the position lights comes from the 28
volt No. 2 dc bus. When POS LIGHTING circuit
breaker is closed, 28 vdc is applied to terminals
of POS EXT LTG.
2.
When the switch is at BRT, 28 vdc is applied
directly to the three position lights. When the
switch is at DIM, 28 vdc is applied through
dimming resistor R1 to the side position lights
and through dimming resistor R2 to the tail
position light.
3.
On aircraft with 67 , setting the remote AFT POS
LIGHT switch at sta. 534 to OFF, removes power
from the aft or tail position light. The AFT POS
LIGHT switch shall be normally kept in the ON
position.
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