Anti-Collision Light Installation - Piper PA-24 Comanche Service Manual

PIPER COMANCHE SERVICE MANl'AL
~OTE
A short of the type described in steps I and 1 will not cause perma-
nent damage to the power supply but the system will be inoperative
if such a short exists. Avoid any connection between pins I and 3 of
the interconnecting cable as this will discharge the condenser in the
power supply and destroy the trigger circuit.
CAlJTIO~
When disconnecting the power supply allow five minutes of bleed
down time prior to handling the unit.
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c. Check interconnecting cables for shorts.
I.
Disconnect the output cables from the power supply outlets.
1.
The following continuity checks can be made with an ohmmeter.
3. Check for continuity between the connectors of each interconnecting cable by checking from
pin I to pin I. pin 1 to pin 2. and pin 3 to pin 3. When making these checks if no
continuity
exists the cable
i~
opened and should be replaced.
4. Check continuity between pins I and 2. I and 3. and 2 and 3 of the interconnecting cable. It
continuity exists between any of these connections the cable is shorted and should be replaced.
5.
Check for continuity from pins 1.2 and J to airplane ground. If continuity exists the cable
i~
shorted and should be replaced.
d. Check the tube socket assembly for shorts.
I. Disconnect the tube socket assembly of the anti-collision light from the interconnecting cable .
., The following continuity checks can be made with an ohmmeter. •
~
Check for continuity between pin I of amp connector to pin I of tube socket. pin 101'
a
connector to
pins (' ,
and 7 of tube socket and pin 3 of amp connector to pin 4 of tube socket. When making
these tests if no continuity exists the tube socket assembly is opened and should be replaced.
9-111. Installation
or
Anti-Collision Light.
a. Plug in new lamp using correct number.
b. Replace light cover.
c. Tighten screw in clamp to secure light cover.
9-111. Troubleshooting. Troubles peculiar to the Comanche electrical system are listed in Table IX-lit at
the back of this section along with their probable causes and suggested remedies. The wiring diagrams included
in this manual will give a physical breakdown of the different electrical circuits used in this airplane. (Refer to
Table IX·I\'.j
After the trouble has been corrected. check the entire electrical system for security and operation of its
components.
REVISED: 4/10/81
302
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ELECTRICAL 5\'ST£:\1