IO-390-D Series Engine Maintenance Manual
© 2020 Avco Corporation. All Rights Reserved
Introduction
March 2020
Page xxiii
IO-390-D Series Engine Maintenance Manual
NOTICE:
If you do not obey the maintenance procedures in this manual for this engine, you can
void the engine warranty. Refer to your warranty for details.
Refer to the
IO-390-D Series Engine Installation and Operation Manual
for engine description,
uncrating procedures, acceptance check, engine lift procedure, engine preservation and storage,
depreservation, engine installation requirements, engine installation, engine start, operation and stop
procedures, engine initiation (break-in/flight test), fuels and oil to be used, and operating
specifications.
Refer to the latest revision of the
Service Table of Limits - SSP-1776,
for dimensions, clearances,
measurements, and torque values.
OPERATE THIS ENGINE IN ACCORDANCE WITH SPECIFICATIONS IN
APPENDIX A OF THE IO-390-D SERIES ENGINE INSTALLATION AND
OPERATION MANUAL. OPERATING THE ENGINE BEYOND SPECIFIED
OPERATING LIMITS CAN CAUSE PERSONAL INJURY AND/OR
DAMAGE TO THE ENGINE.
Warnings, Cautions, and Notices
Be sure to read and obey the Warnings, Cautions, and Notices in this manual and in service
documents. Although Lycoming Engines cannot know all possible hazards or damages, it makes a
reasonable effort to supply the best known guidance and recommended practices for safe operation
and maintenance of its engines.
The table below defines the four types of safety advisory messages used in this manual as per the
American National Standard and ANSI Z535-6-2006.
Safety Advisory Conventions
Advisory Word
Definition
DANGER:
Indicates a hazardous situation which, if not avoided, will result
in death or serious injury. This signal word is to be limited to the
most extreme situations.
WARNING
Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION
Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury. It also can be used without
the safety alert symbol as an alternative to
"NOTICE."
NOTICE:
The preferred signal word to address practices not related to
personal injury.
NOTICE:
In this manual, the word "recommend" refers to "best practices."
Service Bulletins, Service Instructions, and Service Letters
As advancements in technological applications on this engine continue, Lycoming will make future
revisions to this manual. However, if more timely distribution is necessary, Lycoming supplies up-
to-date Service Bulletins (SBs), Service Instructions (SIs) and Service Letters (which are abbreviated
with a capital “L” followed by the number, example L180). Special Advisories (SAs) are supplied as
necessary.
