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(3.) Shut down engines.
(4.) Set power lever at locations marked. With adjustment screw on switch bracket, adjust eachswitch separately towardactuator angle until switch actuates. The adjustment screw is reached by inserting a long screwdriverthrough the travel slot of the power lever in the pedestal cover.
(b) HornOperational Check:
(1.) To check horn operation, jack airplane and retract landing gear. With master switch on, retardeither power leveruntil gear up indicator horn sounds. Check location of power lever to adjusting mark. The warning horn operates wheneither or both power levers are retarded.
(2.) With warning horn operating,lower gear to ensure horn ceases to operate when the gear is down andlocked. (3.) Remove airplanefromjacks.
(c) FlightCheck:
(1.) Ensure operation of warning system when gear is up and either or both power levers are reducedbelow 300 foot-pounds of engine torque.
EFFECTIVITY:

040-999 Jan 1
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PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

CHAPTER 33

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PIPER AIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

CHAPTER33- LIGHTS

TABLE OF CONTENTS

SUBJECT CHAPTER PAGE
33-00-00

General Compartment 1 Warning Light System 1 Annunciator Panel Lamp Test 1 FluorescentGlareshield Lighting 1 Removal of Pilot/Copilot Flood Lights 1 Installation of Pilot/Copilot Flood Lights 1 Adjustmentof Glareshield FluorescentLighting Inverter 1
Fault Isolation GeneralGuidlines Dimmer Control Assembly Removalof Dimmer ControlAssembly Repair of Dimmer Control Assembly Installationof Dimmer Control Assembly Dome Light Removalof Dome Light Installationof Dome Light
PassengerCompartment OverheadReading Lights Removalof Overhead Reading Lights Installationof Overhead Reading Lights
Exterior Landing and Taxi Lights Removalof Landing and Taxi Lights Adjustmentof Landingand Taxi Lights Installationof Landing and Taxi Lights Wing Tip Strobe Lights Removalof Wing TipStrobe Lights Installationof Wing Tip Strobe Lights
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Removalof Wing Tip Strobe Power Supply 2 Installationof Wing Tip Strobe Power Supply 2 Fault Isolation (Wing Tip Strobe Lights) 3 Characteristics 4of an Xenon Flash Tube Wing Inspection Light 5 Descriptionand Operation 5 Servicingof Wing Inspection Light 5 Removalof Wing InspectionLight 5 Installationof Wing Inspection Light 5 EFFECTIVITY: 040-999
CONTENTSJan 10/90

PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCEMANUAL

Lights
A. General Compartment
This chapter, used in conjunction with PA-42-720 (AdvancedTrainer) Wiring Diagram Manual, provides assistancein servicing the aircraft's lighting system.
WARNING: HIGH VOLTAGES EXIST IN LIGHTING SYSTEM CIRCUITS. FAILURE TO FOLLOW SAFETY PRECAUTIONS MAY RESULT IN SERIOUS INJURY OR DEATH.
The electroluminescent EL panels are activated with 140 Vac, 400 Hertz from the EL inverter. The fluorescent, glareshield flood lighting is supplied with a minimum of 375 Vac via the coaxial harness and dimmer inverter. The anti-collision strobes are supplied with 450 Vdc to the xenon tubes from the strobepowersupply.
Refer to Wiring Diagram Manual for point to point, wire to wire information, and 24-30-OOof the PA-42-720 (Advanced Trainer) Maintenance Manual for power distribution and systems components such as circuit breakers and switch panel information.
1. WarningLightSystem
(a) Annunciator Panel Lamp Test
The annunciator panel is located above the instrument panel.
Push the PUSH TO TEST switch to check operation of lamps.
2. Fluorescent Glareshield Lighting
(a) Removalof Pilot/Copilot Flood Lights
(1.) Ensure electrical power is off.
(2.) Remove cover panels to expose fluorescenttubes.
(3.) Remove tube, or tubes, from fixtures.

(b) Installation of Pilot/Copilot Flood Lights
(1.) Replace tube, or tubes, in fixtures.
(2.) Reinstall royalite panel.
(3.) Install cover panels to fluorescent tubes.

(c) Adjustmentof Glareshield FluorescentLightingInverter
(1.) Ensure electrical power is off.
(2.) Remove cover panels.
　
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