Rotax 915 iSc 3 A User manual

AIRCRAFT ENGINES
ref. no.: IM-915 i A | part no.: 898871
INSTALLATION MANUAL
FOR ROTAX® ENGINE TYPE 915 i A SERIES
picture: ROTAX® 915 iS with options

Before starting with engine installation, please read the Installation Manual completely as it
contains important safety relevant information.
This Installation Manual for the ROTAX®aircraft engines should only be used as a general
installation guide for the installation of ROTAX®engines into airframes. It should not be used as
instruction for the installation of a ROTAX®aircraft engine in a specific type of airframe or
airplane. BRP-Rotax GmbH & Co KG does not assume any warranty or liability in this context.
In no event shall the Installation Manual be used without following the specific instructions and/or
requirements of the manufacture of an airframe or airplane (“Manufacturer”). For verification and/or
for release of the engine installation, the respective Manufacturer must be contacted. Any
modifications or adaptations to the airframe or airplane shall be carried out and/or be verified and
released by the Manufacturer only.
Improper use of the Installation Manual and/or non compliance with the installation requirements
of the Manufacturers can cause personal injury or property damage. BRP-Rotax GmbH & Co. KG
disclaims any liability for any and all damage and/or injuries (including death) resulting from the
improper use of Installation Manual and non compliance with the installation requirements of the
Manufacturer.
These technical data and the information embodied therein are the property of BRP-Rotax
GmbH & CO KG, Austria, acc, BGBI 1984 no. 448, and shall not, without prior written permission of
BRP-Rotax GmbH & Co KG, be disclosed in whole or in part to third parties. This legend shall be
included on any reproduction of these data, in whole or in part. The Manual must remain with the
engine/aircraft in case of sale.
Copyright 2017© - all rights reserved.
ROTAX®is a trade mark of BRP-Rotax GmbH & Co KG. In the following document the short form
of BRP-Rotax GmbH & Co KG = BRP-Rotax is used.
Other product names in this documentation are used purely for ease of identification and may be
trademarks of the respective company or owner.
Translation into other languages might be performed in the course of language localization but
does not lie within ROTAX® scope of responsibility.
In any case the original text in English language and the metric units are authoritative.

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Table of Content
Chapter INTRO – GENERAL NOTE
Chapter LEP – LIST OF EFFECTIVE PAGES
Chapter TOA – TABLE OF AMENDMENTS
Chapter 00–00–00 – GENERAL NOTE
Chapter 10–10–00 – STORAGE AND INSTALLATION
Chapter 24–00–00 – ELECTRICAL POWER
Chapter 61–00–00 – PROPELLER DRIVE
Chapter 72–00–00 – ENGINE
Chapter 72–60–00 – AIR INTAKE SYSTEM
Chapter 73–00–00 – ENGINE – FUEL AND CONTROL
Chapter 75–00–00 – COOLING SYSTEM
Chapter 76–00–00 – ENGINE CONTROLS
Chapter 77–00–00 – ENGINE INDICATING
Chapter 78–00–00 – EXHAUST SYSTEM
Chapter 79–00–00 – LUBRICATION SYSTEM
Chapter 80–00–00 – STARTING
BRP-Rotax
INSTALLATION MANUAL

Notes
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NOTES
BRP-Rotax
INSTALLATION MANUAL

BRP-Rotax
INSTALLATION MANUAL
Chapter: INTRO
GENERAL NOTE
Foreword Before carrying out engine installation related work on the engine, read this Installation
Manual carefully. The manual will provide you with basic information on correct engine
installation for safe engine operation.
If any passages of the manual are not clearly understood or if you have any questions,
please contact a ROTAX® authorized distributor or their independent Service Center for
ROTAX® aircraft engines.
BRP-Rotax GmbH & Co KG (hereinafter “BRP-Rotax“) wishes you much pleasure and
satisfaction flying your aircraft powered by this ROTAX® aircraft engine.
The structure of the manual follows, whenever possible, the structure of the ATA (Air
Transport Association) standards. The aim is the compatibility with the aircraft
manufacturers documentation, which means they still must adapt or incorporate the
documentation to their standard.
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Notes
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INSTALLATION MANUAL

BRP-Rotax
INSTALLATION MANUAL
Chapter: LEP
LIST OF EFFECTIVE PAGES
Chapter Page Date
Title page
INTRO 1 December 01 2017
2 December 01 2017
LEP 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
TOA 1 December 01 2017
2 December 01 2017
00-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
13 December 01 2017
14 December 01 2017
15 December 01 2017
16 December 01 2017
17 December 01 2017
18 December 01 2017
10-10-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
Chapter Page Date
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
24-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
13 December 01 2017
14 December 01 2017
61-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
72-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
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Chapter Page Date
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
72-60-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
73-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
75-00-00 1 December 01 2017
2 December 01 2017
Chapter Page Date
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
13 December 01 2017
14 December 01 2017
76-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
10 December 01 2017
11 December 01 2017
12 December 01 2017
13 December 01 2017
14 December 01 2017
77-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
LEP
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Chapter Page Date
8 December 01 2017
9 December 01 2017
10 December 01 2017
78-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
79-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
9 December 01 2017
Chapter Page Date
10 December 01 2017
11 December 01 2017
12 December 01 2017
13 December 01 2017
14 December 01 2017
15 December 01 2017
16 December 01 2017
80-00-00 1 December 01 2017
2 December 01 2017
3 December 01 2017
4 December 01 2017
5December 01 2017
6 December 01 2017
7December 01 2017
8 December 01 2017
Index
Rear page
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Notes
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INSTALLATION MANUAL

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INSTALLATION MANUAL
Chapter: TOA
TABLE OF AMENDMENTS
Approval*
The technical content of this document is approved under the authority of DOA ref.
EASA.21.J.048.
Cur-
rent
no.
Chapter Page Date of change Remark
for
approval
Date of
approval
from
authorities
Date of
inclusion
Signature
0INTRO all December 01 2017 DOA*
0 LEP all December 01 2017 DOA*
0 TOA all December 01 2017 DOA*
0 00-00-00 all December 01 2017 DOA*
0 10-10-00 all December 01 2017 DOA*
0 24-00-00 all December 01 2017 DOA*
0 61-00-00 all December 01 2017 DOA*
0 72-00-00 all December 01 2017 DOA*
0 72-60-00 all December 01 2017 DOA*
0 73-00-00 all December 01 2017 DOA*
0 75-00-00 all December 01 2017 DOA*
0 76-00-00 all December 01 2017 DOA*
0 77-00-00 all December 01 2017 DOA*
0 78-00-00 all December 01 2017 DOA*
0 79-00-00 all December 01 2017 DOA*
0 80-00-00 all December 01 2017 DOA*
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Summary of amendments
Summary of the relevant amendments in this context, but without any claim to completeness.
Current
no.
Chapter Page Date of change Comment
TOA
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Chapter: 00–00–00
GENERAL NOTE
TOPICS IN THIS CHAPTER
General....................................................................................................................................................2
Type description......................................................................................................................................3
Scope of supply.......................................................................................................................................4
Auxiliary equipment (optional) ................................................................................................................5
Abbreviations and terms .........................................................................................................................6
Conversion table ...................................................................................................................................9
Safety notice .........................................................................................................................................10
Safety information ............................................................................................................................... 11
Instruction...........................................................................................................................................13
Technical documentation ......................................................................................................................14
Approval of electric and electronic components (Equipment Qualification according to RTCA/DO-
160) .......................................................................................................................................................16
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INSTALLATION MANUAL
GENERAL
Purpose The purpose of this manual is to provide aircraft manufacturers with technical require-
ments (e.g. interface descriptions and limitations) that must be adhered to when installing
this type of engine into an aircraft or certifying aircraft powered by this engine type. Fur-
thermore it should allow independent ROTAX® Maintenance Technicians (iRMT) to install
this engine into an airframe in compliance with the relevant installation and safety instruc-
tions provided by the engine manufacturer.
For detailed information related to aircraft and aircraft/engine installation, maintenance,
safety or flight operation, consult the documentation provided by the aircraft manufacturer
and/or its dealer.
For additional information on engines, its maintenance or parts, you can also contact your
nearest ROTAX® authorized Aircraft Engine Distributor or their independent Service
Center.
ROTAX
Distributors
For ROTAX® Authorized Distributors for aircraft engines see latest Operators Manual or
the official website www.FLYROTAX.com.
Engine serial
number
When making inquiries or ordering parts, always indicate the engine serial number. Due to
continues product improvement, engines of the same engine type might require different
support and spare parts.
The engine serial number is on top of the crankcase, behind the propeller gearbox.
Figure 1.1: Engine serial number
1Engine serial number
00–00–00
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INSTALLATION MANUAL
TYPE DESCRIPTION
The type description consists of the following parts:
e. g. ROTAX 915 iSc 3 A
type certification configuration additional
designation
Designation
Designation Description
Type 915 4-cylinder horizontally opposed, turbocharged engine.
Certification iSc Certified to EASA CS-E (TC No.EASA.E.121)
iS Approved to ASTM F2339.
Configuration 3Propeller shaft with flange for constant speed propeller
and drive for hydraulic governor for constant speed
propeller.
Additional
designation
AStandard version
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SCOPE OF SUPPLY
Basic • 4- stroke-, 4 cylinder horizontally opposed-, spark ignition engine, single central cam-
shaft push rods —OHV
• Liquid cooled cylinder heads
• Ram air cooled cylinders
• Dry sump forced lubrication
• Fully redundant electronic engine management system (EMS) for controlling fuel injec-
tion, ignition, etc.
• Propeller drive via gearbox with integrated torsional vibration absorber and overload
clutch
• Oiltank
• Electric starter
00–00–00
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INSTALLATION MANUAL
AUXILIARY EQUIPMENT (OPTIONAL)
Any equipment not included as part of the standard engine version and thus not a fix com-
ponent of the engine is not in the volume of supply.
Components especially developed and tested for this engine are readily available at BRP-
Rotax.
Auxiliary equip-
ment certified
The following auxiliary equipment has been developed and tested for this engine.
• See relevant Illustrated Parts Catalog
Auxiliary equip-
ment not certified
The following auxiliary equipment has not been developed and tested for this engine.
• See relevant Illustrated Parts Catalog
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ABBREVIATIONS AND TERMS
Abbreviations Description
* Reference to another section
�center of gravity
The drop symbol indicates use of sealing agents, adhesives or lubri-
cants (only in the Illustrated Parts Catalog).
°C Degrees Celsius (Centigrade)
°F Degrees Fahrenheit
rpm Revolutions per minute
A Ampere
AAPTS Ambient Air Pressure Temperature Sensor
AC alternating current
Ah Ampere hour
A/C Aircraft
AR as required
assy. assembly
ASB Alert Service Bulletin
ACG Austro Control GmbH
ACL Anti Collision Light
API American Petrol Institute
ASTM American Society for Testing and Materials
ATA Air Transport Association
AWG American Wire Gauge
CAN Controller Area Network
Coil 1–4 Ignition coils 1–4
CPS 1+2 Crankshaft Position Sensor 1+2
CSA Constant Speed Actuator
CTS Cooling Temperature Sensor
CW clockwise
CCW counter-clockwise
CGSB Canadian General Standards Board
DCDI Dual Capacitor Discharge Ignition
00–00–00
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INSTALLATION MANUAL
DC direct current
DOA Design Organisation Approval
DOT Department of Transport
EASA European Aviation Safety Agency
IM Installation Manual
ECU Engine Control Unit
EGT Exhaust Gas Temperature
INTRO Introduction
EMS Engine Management System
EN European Norm
ETFE Ethylene Tetrafluoroethylene
FAA Federal Aviation Administration
FAR Federal Aviation Regulations
hr. hours
HIC A Harness Interface Connector A
HIC B Harness Interface Connector B
IFR Instrument Flight Rules
INJ 1–8 Injector 1–8
IPC Illustrated Parts Catalog
ips inch per second
iRMT independent ROTAX Maintenance Training
ISA International Standard Atmosphere
kg Kilograms
KNOCK Knock sensor
MAPS 1+2 Manifold Air Pressure Sensor 1+2
MATS 1+2 Manifold Air Temperature Sensor 1+2
MON Motor Octane Number
MAG Magneto Side
N Newton
n.a. not available
NDT Non Destructive Testing
Nm Newtonmeter
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NVFR Night Visual Flight Rules
OHM Overhaul Manual
OHV Over Head Valve
OM Operators Manual
OPS Oil Pressure Sensor
OTS Oil Temperature Sensor
PCV Pressure Control Valve
POA Production Organisation Approval
PTFE Polytetrafluoroethylene
PTO Power Take Off
Rev. Revision
ROTAX® is a trademark of BRP-Rotax GmbH & Co KG
RON Research Octane Number
RON 424 ROTAX® Norm 424
s.v. still valid (only Illustrated Parts Catalog)
S/N Serial Number
SAE Society of Automotive Engineers
SB Service Bulletin
SI Service Instruction
SI-PAC Service Instruction Parts and Accessories
SL Service Letter
SMD Surface Mounted Devices
TBO Time Between Overhaul
TC Type certificate
part no. Part number
TOA Table Of Amendment
TOC Table of content
TSN Time Since New
TSNP Time Since New Part
TSO Time Since Overhaul
V Volt
VFR Visual Flight Rules
LEP List of Effective Pages
00–00–00
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