(c)
Removescrew securing bus bar to circuit breaker.

(d)
Removescrew securing wire to circuit breaker.

(e)
Removelocknust securing circuit breaker to support bracket. Remove circuit breaker from bracket.

10. Installation of Screw Connect Type Circuit Breakers
WARNING: ENSURE THAT BATTERY MASTER SWITCH AND THE GENERATOR SWITCHESARE IN THE OFF POSITION WHEN WORKING ON THE CIRCUIT BREAKER PANEL.
(a)
Place circuit breaker into support bracket. Secure with locknut.

(b)
Attach wire to circuit breaker terminal with screw.

(c)
Attach bus bar to circuit breaker terminal with screw.

(d)
Postion support bracket to panel assembly with screws.

(e)
Position cover panel and secure with screws.

EFFECTIVITY:
040-999

Jan 10/9024-60-00
PIPERAIRCRAFT
PA-42-720(AdvancedTrainer)
MAINTENANCEMANUAL

A. DC ElectricalLoadDistribution(continued)
Circuit Breaker Terminal -Screw Attachment 
0  Insulator Plate  Electroluminescent Panel Insulator / AC Bus Mounting Hardware 
MountingPlate -forAC Circuit Breakers  Breaker Locknutand Washer 
LeftAuxiliaryCircuitBreakerPanel 

CircuitBreakerInstallation Figure402

EFFECTIVITY:
040-999
24-60-00 Jan10/907
24-60-PAGE
PIPER AIRCRAFT
PA-42-720(Advanced Trainer)
MAINTENANCEMANUAL

A. DCElectricalLoad Distribution (continued)
CHART 4 BREAKERFUNCTION-LEFT BREAKER PANEL (Sheet 1 of 3)
USED CIRCUIT BREAKER CIRCUIT
ON CODE BREAKER VALUE (AMPS) PROTECTED

FUEL PUMP  10  Left Engine Electric Fuel Pump 
INVERTER NO. 2  15  Number 2 dc to ac Power Inverter 
FUEL TEMP SENSE  5  Fuel Temperature Monitor 
FUEL FLOW  5  Left Engine Fuel Flow Indicating 
FUEL PRESS  5  Left Engine Fuel Pressure IndicatingSystem 
OIL PRESS  3  Left Engine Oil Pressure Indicating System 
OIL TEMP  3  Left Engine Oil Temperature IndicatingSystem 
OIL COOLER  5  Left Engine Oil Cooler Door 
TORQUE METER  3  Left Engine Torque Indicating System 
BLEED AIR CONT  3  Left Engine Bleed Air Valve 
PROP DEICE  30  Left Propeller Deicer and Deice Timer 
Left Propeller Inboard Heating Element 
Left Propeller Outboard Heating Element 
AIR INTAKE DEICE  30  Left Engine Air Intake Parting Strip 
Left Engine Lip Deicer Shed Area I 
Left Engine Lip Deicer Shed Area II 
ICE VANE CONT  7.5  Left Engine Ice Deflector Door, Relays, and 
Indicator 
HTG RESET  5  Left Hydraulic ToppingGeneratorReset 
Switchesand Solenoid 
IGNITION  5  Left Engine Ignitor 
Left engine Ignition Monitor Relay 
Left Engine Automatic Ignition Torque Switch 
START CONT  5  Left Engine Start Contactor 
ITT  5  Left Engine InterturbineTemperatureSystem 
EMER PRESS  3  EmergencyCabinPressureValve 
SPK AMPLI  3  SpeakerAmplifier 
MAP LIGHTS  5  Left and Right Cockpit Map Lights 
No Smoking Light 
Fasten Seat Belt Light 
PublicAddress Chime Amplifier 
BETA SOL  3  Leftand Right Engine Lock Pitch Solenoids 
PRESS CONT  5  Cabin Door Solenoid Valve Vacuum Relief 
Solenoid 

EFFECTIVITY:
040-999

Jan10/9024-60-00

PIPERAIRCRAFT
PA-42-720(Advanced Trainer) MAINTENANCEMANUAL

A. DC Electrical Load Distribution (continued)
CHART 4 BREAKERFUNCTION-LEFTBREAKERPANEL (Sheet2 of 3) 
USED ON CODE  CIRCUIT BREAKER  BREAKER VALUE(AMPS)  CIRCUIT PROTECTED 

B  LEFTPITOTHEAT 
B  L. WINDSHIELD HEAT 
B  L. WINDSHIELD CONT 
B  FUELQUANTITY 
B  SURFACEDEICE 
B  PANELLIGHTSLEFT 
B  PANELLIGHTS CENTEF 
B  PANELLIGHTSRIGHT 
A  LOGO LIGHTS 
B  LANDING LIGHT 
B  TAXILIGHT 
B  POSITIONLIGHTS 
B  STROBELIGHTS 
B  GEAR POS IND 
B  GEARWARN 
B  INVERTERNO.2 
B  ELECTTRIM 
B  PHONE AMP 1 
B  LEFTALTIMETERENC 
B  ANNUNMALF 
B  ANNUN 
B  L. GEN RESET 
B  R. GEN RESET 
B  VOLTAGECONT 
B  VOLTAGECONT 
　
中國航空網 www.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：夏延飛機維護手冊 Cheyenne IIIA PA-42-720 AMM 1(84)