ENGINE INDICATING SYSTEM

ENGINE INDICATING SYSTEM

N1 SPEED SENSOR

TO SEND N1 SIGNAL TO PMC AND FLIGHT DECK

PHONIC WHEEL

N1 TACHOMETER

N2 SPEED SENSOR

TO SEND N2 SIGNAL

TO FLIGHT DECK AND

ENERGIZE THE PMC

N2 TACHOMETER

EGT INDICATING SYSTEM

JUNCTION OF TWO DISSIMILAR METALS

EGT THERMOCOUPLE

THERMOCOUPLES

EGT THERMOCOUPLE HARNESS

EGT INDICATING

AIRBORNE VIBRATION MONITORING SYSTEM

NO.1 BEARING VIBRATION SENSOR

The No.1 bearing (NOB) vibration sensor

(fan) is installed in the No.1 bearing housing

at the 9 o’clock position.

Purpose

Senses low speed (No.1 bearing) and high

speed (No.3 bearing) rotor vibration levels.

NOB VIBRATION AND LEAD CONNECTOR

FFCCV SENSOR (ALTERNATE SENSOR)

Fan Frame Case Compressor Vertical

TURBINE REAR FRAME VIBRATION

AVM SIGNAL CONDITIONER