Trouble Shooting; Landing And Taxi Lights (Wing Mounted) - Cessna 1969-1976 172 Series Service Manual

16-51. TROUBLE SHOOTING (Cont).
TROUBLE
CONTROL WHEEL MAP
LIGHT WILL NOT LIGHT
1971 AIRCRAFT & ON. (Cont. )
PROBABLE CAUSE
Defective wiring.
Defective map light assembly.
1
I
16-52. LANDING AND TAXI LIGHTS (WING MOUNT-
ED).
16-53. DESCRIPTION. The landing and
taxi
lights
a r e mounted in the leading edge of the left wing. A
clear plastic cover provides weather protection for
the l a m p s and
is
shaped t o maintain the leading edge
curvature of the wing. The landing light lamp is
mounted on the inboard side and adjusted to throw its
beam further forward than the taxi light. The landing
and taxi lights a r e both controlled by a single pull
type switch located on the instrument panel.
16-54. REMOVAL AND INSTALLATION OF LAND-
ING AND TAXI LIGHTS (WING MOUNTED).
window assembly (1) and the assembly will then be
f r e e for removal.
bracket assembly and remove the bracket.
a. Remove the 18 s c r e w s securing the landing light
b. Remove the four attaching s c r e w s (6) from the
NOTE
Do not reposition the landing and
taxi
light
adjustment s c r e w s (2). If readjustment is
required refer to figure 16-6.
c. Remove the two s c r e w s securing the wiring to
d. Install new lamp and reassemble.
the lamp contacts and remove the lamp.
16-55. LANDING AND TAXI LIGHT (COWL MOUNT-
ED).
16-56. DESCRIPTION. The landing and taxi light is
mounted in the forward end of the engine cowling.
This position facilitates the use of one lamp
as
both
a landing and taxi light. The landing and taxi
light
is controlled by a rocker type switch on the instru-
ment panel.
REMEDY
3. Test circuit until short is lo-
cated. Repair o r replace wiring.
4. Test for open circuit. Repair
o r replace wiring. If
a
short
o r
open circuit is not found, proceed
to step 5.
5. Check voltage
at
map light
assembly with m a s t e r and nav
switches on. If battery voltage
is present, replace map light
assembly.
16-57. REMOVAL AND INSTALLATION. (COWL
AND F17200881 EXCEPT WHEN MODIFIED IN AC-
MOUNTED) (THRU AIRCRAFT SERIALS 17260758
CORDANCE WITH SK172-38) (Refer to figure 16-6. )
nose cap (3) and remove the bracket.
wire connections a r e exposed on the base of the lamp.
Disconnect the wires and remove the lamp.
a.
b.
Remove the 4 s c r e w s securing bracket (1) to
Pull the lamp away from the nose cap until the
c. To reinstall the lamp r e v e r s e this procedure.
16-58. REMOVAL AND INSTALLATION. (COWL
MOUNTED) (BEGINNING WITH AIRCRAFT SERIALS
17260759 and F1700882 AND WHEN MODIFIED IN
ACCORDANCE WITH SK172-38) (Refer to figure 16-6. )
a.
Disconnect lamp wires then remove lower cowl.
b. Remove s c r e w s (5) and remove lamp assembly.
NOTE
Note position and number of washers
between support (6) and bracket (1).
c. Remove s c r e w s (8) and remove lamp.
d. To reinstall the lamp reverse this procedure.
16-59. ADJUSTMENT OF LANDING AND TAXI
LIGHT (COWL MOUNTED) (AIRCRAFT SERIALS
17259224 THRU 17259737 AND F17200755 THRU
F17200804 WHEN NOT MODIFIED IN ACCORDANCE
WITH SK172-38) (Refer to figure 16-6. ) Adjustment
of the landing and taxi light
is
preset a t the factory,
however changes to this adjustment may be made as
desired.
a.
Remove the lamp (See paragraph 16-57. )
b. Adjustment is accomplished by turning the
s c r e w s until they bottom out against the bracket.
Change 2 16-22A