Chapter 3 - Troubleshooting; General; Procedure - Planet ES-10024B-1 Maintenance Manual

Aircraft alternator

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Table Of Contents

Table of Contents

Aircraft Alternator

Maintenance Manual

3.1

General

In the event of malfunction in electrical power, it should not be assumed to be an alternator fault

before employing proper troubleshooting procedures. The overall objective of trouble-shooting

is to find the cause of trouble and take corrective action to prevent a recurrence. Even

perfectly operational alternators cannot compensate for improper adjustments, corroded or worn

parts, and improper installation or lack of maintenance.

This section provides general troubleshooting procedures for the alternator assembly for

unscheduled maintenance and for possible fault detection prior to maintenance activity. It

gives procedures to follow to determine the best course of action prior to disassembly. Block

type troubleshooting charts are also provided. Upon determination of fault(s), refer to the

TESTING (section 6) for applicable test procedure(s).

3.2

Procedure

WHEN SERVICING, REPAIRING, OR OVERHAULING THE ALTERNATOR,

GREAT CARE AND CAUTION MUST BE TAKEN TO AVOID HAZARDOUS

SITUATIONS. THE ALTERNATOR WHEN MOUNTED ON AN AIRCRAFT

OR ROTORCRAFT, PRESENT A PHYSICAL HAZARD FROM PROPELLERS,

ROTORS AND OTHER ROTATING DEVICES. THE ALTERNATOR PRODUCES

A HIGH ELECTRICAL CURRENT OUTPUT AND ALSO PRESENTS AN

ELECTRICAL SHOCK HAZARD, THAT CAN RESULT IN SERIOUS INJURY

IF PROCEDURES IN THIS MANUAL OR THE AIRCRAFT/ROTORCRAFT

SERVICE MANUALS ARE NOT FOLLOWED.

It is required to reference the aircraft or rotorcraft AFM or POH as well as the applicable

service or maintenance manual as required.

The Charts on the following pages represent six main areas of trouble in an alternator. Choose

the applicable symptom and follow the trouble shooting chart flow. Below each chart is a

discussion of each point.

ES1031

Rev. A: 11 Aug. 2021