ENSTROM TH-28 Series User manual

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ENSTROM TH-28/480 SERIES MAINTENANCE MANUAL
SUPPLEMENT 6
PARTIAL WIDE INSTRUMENT PANEL
The Airworthiness Limitations section is FAA approved and
specifies maintenance required under 14 CFR §§ 43.16 and 91.403
unless an alternative program has been FAA approved.
Copyright 2010 by
The Enstrom Helicopter Corporation
2209 22nd Street
Menominee, Michigan 49858-3595
Telephone: [phone]
Fax: [phone]
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RECOMMENDED CHANGE REPORT
This maintenance manual is prepared and distributed by The Enstrom Helicopter
Corporation and is intended for use by personnel responsible for maintaining Enstrom
TH-28, 480, and 480B helicopters. This manual is periodically revised. If, in the opinion
of the user, any information has been omitted or requires clarification, please direct your
comments to Enstrom via this form (duplicate) or other similar form. Send the
recommended changes to:
The Enstrom Helicopter Corporation
2209 22nd Street
Menominee, MI 49858-3595
ATTN: Technical Publications
Manual Identification: Enstrom TH-28/480 Series Maintenance Manual Supplement 6
Manual Date: November 15, 2010
Revision Number and Date:
Aircraft Model:
Recommended Change:
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RECORD OF REVISIONS
REV
NO. ISSUE DATE DATE INSERTED BY REV NO. ISSUE DATE DATE INSERTED BY
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TABLE OF CONTENTS
Chapter Description Page
Cover Page.......................................................................................... i
Recommended Change Report..........................................................iii
Record of Revisions ........................................................................... v
Table of Contents..............................................................................vii
Effective Page List..............................................................................ix
Section 1 Introduction
1-1. Aircraft Effectivity.............................................................................1-1
1-2. Supplemental Changes and Revisions............................................1-1
1-3. Application of Warnings, Cautions, and Notes................................1-1
Section 2 General Information
2-1. System Description..........................................................................2-1
Section 3 Airworthiness Limitations
3-1. Airworthiness Limitations.................................................................3-1
Section 4 Servicing and Periodic Inspections
4-1. Servicing..........................................................................................4-1
4-2. Periodic Inspections ........................................................................4-1
Section 5 System Maintenance
5-1. Layout..............................................................................................5-1
5-2. Access.............................................................................................5-1
5-3. Removal ..........................................................................................5-1
5-4. Inspection........................................................................................5-1
5-5. Repair..............................................................................................5-2
5-6. Installation .......................................................................................5-2
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EFFECTIVE PAGE LIST
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SECTION 1
INTRODUCTION
1-1. Aircraft Effectivity
A. The data presented in this TH-28/480 Series Maintenance Manual
Supplement is applicable to all Enstrom 480B model helicopters equipped with the
optional Partial Wide Instrument Panel, P/N 4220600-5.
1-2. Supplemental Changes and Revisions
A. Subsequent to the publication of the initial issue of this supplement, changes
in the Partial Wide Instrument Panel, support concepts and procedures, as well as
information developed by experience may affect the contents of this supplement. To
ensure that coverage in the supplement continues to reflect such changes, revised
information is released by one of the following methods:
1. Revision - A revision alters portions of the manual by replacement, addition,
and/or removal of pages.
2. Reissue - A reissue of this supplement will occur when the amount of
changes warrants complete reissue.
3. Service Information Letters (SIL) - Service Information Letters are used to
transmit information, recommendations, and general service instructions to
the aircraft owner/operator and maintenance personnel.
4. Service Directive Bulletins (SDB) - Service Directive Bulletins are used to
direct the owner/operator and/or maintenance personnel to make mandatory
inspections, changes, or modifications to the aircraft.
1-3. Application of Warnings, Cautions, and Notes
A. Throughout this supplement, it is necessary to highlight or emphasize
important points to avoid injury to personnel, damage to equipment, or unnecessary
confusion while performing maintenance procedures. The terms “WARNING”,
“CAUTION”, and “NOTE” are used to draw attention to instructions or information
deserving special consideration.
B.
WARNING
Calls attention to use of materials, processes,
methods, procedures, or limits that must be followed
to avoid injury to personnel.
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C.
CAUTION
Calls attention to methods and procedures that must
be followed to avoid damage to equipment.
D.
NOTE
Calls attention to information essential to highlight for
clarification of procedures or to make a task easier.
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SECTION 2
GENERAL INFORMATION
2-1. System Description
A. The Partial Wide Instrument Panel accommodates a combination of
traditional instruments and a Chelton EFIS system. The configuration provides the dual
flight and navigation instrument functions, allows for both traditional instrument and EFIS
training, and allows the Enstrom 480B model to retain flexible cabin seating capability.
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SECTION 3
AIRWORTHINESS LIMITATIONS
3-1. Airworthiness Limitations
A. The Airworthiness Limitations section is FAA approved and specifies
maintenance required under 14 CFR §§ 43.16 and 91.403 unless an alternative program
has been FAA approved.
B. All components of the Partial Wide Instrument Panel are “on condition”.
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SECTION 4
SERVICING AND PERIODIC INSPECTIONS
4-1. Servicing
A. No servicing is required other than that described as part of the required
inspection in Paragraph 4-2.
4-2. Periodic Inspections
A. The following inspection checklist is intended as a guide for 100 hour/annual
inspections for aircraft operating under normal conditions. More frequent inspections
may be required should adverse operating conditions be encountered.
Date
Signature
Aircraft Registration Number
Aircraft Serial Number
PARTIAL WIDE INSTRUMENT PANEL
INITIAL EACH ITEM AFTER ACCOMPLISHMENT
Inspect the following items every 100 hours or annually INITIAL
1. Inspect the upper panel of the instrument console, attachments,
etc. for condition and security.
2. Inspect the instrument console for condition and security of all
instruments.
3. Inspect the instrument console for condition and security of the
console shrouds
4. Ensure the legibility of all decals and placards.
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SECTION 5
SYSTEM MAINTENANCE
NOTE
Removal or installation of equipment will change the
aircraft empty weight and empty weight c.g. These
changes will be recorded on Form F-511-5, Basic
Weight and Balance Record, as required (reference
Enstrom TH-28/480 Series Maintenance Manual).
5-1. Layout – Partial Wide Instrument Panel
A. See Figure 5-1 for the layout of the Partial Wide Instrument Panel.
5-2 Access
A. Gain access to the back of the instrument panel as follows:
(1) Remove the glare shield.
(2) Disconnect the ventilation ducts from the outlets if the ram air ventilation
system is installed.
(3) Remove the screws securing the instrument panel cover and remove the
cover.
5-3. Removal
A. Disconnect the battery and remove all electrical power.
B. Remove the glare shield and instrument panel cover.
C. Disconnect all electrical connectors and hoses from the equipment and
instruments installed in the panel.
D. Remove the equipment and instruments installed in the panel.
NOTE
Ensure all the wiring is identified and marked for
reinstallation.
E. Detach all terminal boards and the electrical control panel from the panel.
F. Remove the hardware securing the instrument panel to the center pedestal.
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G. Remove the instrument panel.
5-4. Inspection
A. Inspect the instrument panel and braces for cracks, scratches, warpage, and
security of installation.
B. Inspect the placards and decals for legibility.
C. Inspect the rheostats and switches for missing and loose knobs.
D. Inspect the glare shield for cracks and security of installation.
5-5. Repair
A. Replace damaged or worn mounting hardware.
B. Replace warped instrument panel braces.
C. Repair cracks I/A/W AC43.13-1B. Contact The Enstrom Helicopter
Corporation Customer Service for detailed damage and repair limitations.
D. Replace missing or illegible placards.
5-6. Installation
A. Place the instrument panel into position and install the securing hardware.
B. Attach the terminal boards and install the electrical control panel.
C. Install the equipment and instruments into the panel.
D. Connect the electrical connectors and hoses to the equipment and
instruments in the panel.
E. Install the panel cover and glare shield.
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