AVIATION 325 PITOT STATIC SYSTEM n VACCUM SYSTEM

AVIATION 325 PITOT - STATIC SYSTEM n VACCUM SYSTEM n ENGINE INSTRUMENTATION n ANNUNCIATOR SYSTEM n

n n PPH = Pounds per Horsepower http: //www. epi-eng. com/Prop. Selection. htm

Pitot-Static System OVERVIEW

Pitot-Static System n Components n Pitot-Static Head

PITOT-STATIC HEAD (1)

PITOT-STATIC HEAD (2)

Pitot-Static System n Components n Drain

Pitot-Static System n Components n Alternate Static Source n n n Storm Window Closed Cabin Vents Closed Heater & Defroster On

Vacuum System

Vacuum System n Overview

Vacuum System n n Dry Pump Regulator

Vacuum System n Manifold Check Valve

Vacuum System n n Filter Low Vacuum Switch

Vacuum System n Vacuum Gauge

Engine Instruments

Engine Instruments n Dual Tachometer Gauge n n n Left magneto Green Arc 500 to 2700 rpm 14 VDC 3 amp CB on main bus Dual MAP Gauge n Intake Port #3 or #4

Engine Instruments n Fuel Pressure Gauge n n Fuel Pump Pressure - Carb Air Pressure. 5 PSI to 8 PSI 14 VDC Engine group main bus

Engine Instruments n Oil Temperature Gauge n Oil Pressure Gauge n 14 VDC n Engine group main bus n Engine group main n Oil Filter Housing bus temp of oil entering engine n pressure switch in 75 F TO 245 F oil line at outlet of n Oil Cooler (185 F) oil pump n n

Engine Instruments n Exhaust Gas Temperature Gauge n n n Bimetallic temp probe #1 Cylinder Exhaust Manifold Cylinder Head Temp Gauge n n # 4 Cylinder 200 F to 500 F 14 VDC Engine group main bus

ANNUNCIATOR SYSTEM

Annunciator System n n n Introduction Components Lights Fault Warning Flasher Seminole Annunciator Lights

INTRODUCTION Warning and caution indicators may be the first indication of trouble or malfunction in some system or component of the airplane

Annunciator System Components n n n Annunciator Panel Press-to-Test Switch Fault Warning Flasher

Annunciator Lights n n Red Warning Immediate Attention and Action Yellow (or Amber) Caution - Attention but not Immediate Reaction Green Advisory White - System Status

Fault Warning Flasher n n If Fault Requires Immediate Attention Appropriate Red Warning Annunciator on Panel Illuminates

n n n Flasher begins Flashing Press to Reset Red Annunciator remains on until fault is corrected or condition no longer exists

Fault Warning System n n Green or Yellow Annunciator Light will not trigger the fault warning system Some Systems include aural warnings

Seminole Annunciator System

Annunciator Lights n n Press-to-Test ALT - Amber n Alternator Off Line n n ALT Switch Turned Off Over Voltage Relay

Annunciator Lights n VAC -Amber n Vacuum Less Than 4. 25” Hg

Annunciator Lights n OIL - Amber n Oil Pressure Less Than 15 PSI

Annunciator Lights n LOW BUS - Red n Voltage of Alternators Less Than 12. 5 V

Annunciator Lights n HEATER OVERHEAT - Red n Heater Temperature Exceeds 300 to 400 F Safety Switch o n

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