TM 1-1520-238-T-6
9–91
9–7.
SYSTEM DESCRIPTION (cont)
9–7
(5) Navigation Lights.
The navigation lights (fig. 9–82) provide position and direction information to
other aircraft during flight. LT NAV circuit breaker (CB73), on the pilot’s center circuit breaker panel, supplies
28 VDC to the pilot EXT LT/INTR LT panel. Setting the NAV switch on the pilot EXT LT/INTR LT panel from OFF
to BRT supplies 28 VDC to the right, left, and aft navigation lights. Setting the NAV switch to DIM routes the circuit
through two resistors, reducing the voltage and dimming the lights.
RIGHT
NAVIGATION LIGHT
(GREEN)
PILOT EXT LT / INTR
LT PANEL
LEFT
NAVIGATION LIGHT
(RED)
TAIL
NAVIGATION LIGHT
(WHITE)
PILOT CENTER CIRCUIT
BREAKER PANEL
28 VDC
28 VDC
28 VDC
28 VDC
LT NAV
CB73
M69-359
Figure 9–82.
Navigation Lights Functional Block Diagram
(6) Formation Lights.
The formation lights (fig. 9–83) provide a visual indication of formation position
and type of aircraft during flight. LT FORM circuit breaker (CB90), on the pilot’s center circuit breaker panel,
supplies 115 VAC to the pilot EXT LT/INTR LT panel. Rotating the FORM switch from OFF to BRT supplies
115 VAC to the right, left, tail, and fuselage formation lights.
FORMATION LIGHT
RIGHT
PILOT EXT LT / INTR
LT PANEL
PILOT CENTER CIRCUIT
BREAKER PANEL
115 VAC
115 VAC
115 VAC
115 VAC
LT FORM
CB90
M69-360
115 VAC
FORMATION LIGHT
TAIL
FORMATION LIGHT
FUSELAGE
FORMATION LIGHT
LEFT
Figure 9–83.
Formation Lights Functional Block Diagram
