PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)

MAINTENANCE MANUAL
CHAPTER 34

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PIPER AIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

CHAPTER 34 -NAVIGATION

TABLE OF CONTENTS

SUBJECT CHAPTER PAGE
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General 1 Description and Operation 2 Instrument Panel 2 Instruments 2 Removal and Installation of Panel Mounted Instruments 3 Removal of Bezel Mounted Instruments 3 Installation of Bezel Mounted Instruments 3 Removal of Clamp Mounted Instruments 3 Installation of Clamp Mounted Instruments 3
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FlightEnvironmentData 1 Fault Isolation (Pitot/Static) 1 Pitot/Static Sysem Test 7 Inspection and Checks of Instruments and System 8 "q"- Differential Pressure System 9 "q" Sensor Functional Check 9 Ground Check Procedure 9 FlightCheckProcedure 10
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PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

Navigation
A. General
ThePA-42-720includespanelmountedinstrumentsandgauges,providingtheflightcrewwith continualmonitoringofengineperformance, andothermiscellaneous
flightcharacteristics, functions. Inaddition,anannunciatorpanel,mountedatthecenteroftheglareshield,providesthecrewwith visualwarningandadvisoryindicationsof aircraftsystemfunctions.Enginepowerlevers,propellerpitch,enginestartcontrols,elevatortrim,ailerontrim,ruddertrimwheels,andthemaincircuit protectionpanelaremountedonapedestallocatedat bottomcenterofinstrumentpanel.Locatedon theleftandrightsidesofcrewcompartment
areplasticcircuitprotectionpanelswith electroluminescent
lighting.Anoverheadpanelcontainsenginecontrolswitchesandmiscellaneous systemswitchesandgauges.
Instrument  Glareshield 
Panel 
Overhead 
Panel 

Left  Fuel  Right 
Control  Circuit
 
Breaker  Main  Panel  Breaker 
Panel  Circuit  Panel 
Left Outboard  Right -Outboard 
Subpanel  Subpanel 
FlightDeck 
Figure1 
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PIPERAIRCRAFT
PA-42-720 (Advanced Trainer)
MAINTENANCE MANUAL

B. Description and Operation
1. Instrument Panel (Figure 2)
The instrument panel consists of three upper metal panels and four electroluminescent plastic lower panels. The upper right and upper left panels contain a flight instrument grouping and a clock. The center panel contains power plant instruments and other related gauges. The four lower panels contain various switches, controls, warning lights, and gauges for monitoring and controlling aircraft functions. Refer to 23-00-00 for avionics information.
EngineInstrument  -AnnunciatorPanel 
Section 
Stall Warning  Avionics(RadioPanel)Section 
Pilot'sFlight 
Instrument- Flight 
nt 
ction 

Glare
Shield

LeftOutboard  RightOutboard 
Electroluminescent  Electroluminescent 
Panel  Panel 
Left Inboard  RightInboard 
Electroluminescent  Electroluminescent 
Panel  Panel 
InstrumentPanel 
Figure2 
2. Instruments 

TheinstrumentsofthePA-42-720areeitherelectricalornon-electrical.Maintenancemustbe performedby a certified repairstationor instrument manufacturer.Makeadjustmentswhere specified.
The majorityof instrumentation is attached to the instrumentpanelwitheither a bezel or clamp. The flight instrumentsarebezelmounted,the engineinstrumentsclampmounted,andthe lower panels areeitherbezelor clamp mountedattachedwith screws.
NOTE: Whenremovinganindividualpanelmountedinstrumentor an entireinstrumentpanel, preventcontactoftheinstrumentfacesandknobswiththecontrolcolumn.Contactwith thecolumncouldcausedamagetotheinstruments.Handleall gyro driveninstruments withextremecaretopreventballdentingof the rotor bearings.
　
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