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List of Publications
Refer to the latest revision of Service Letter No. L114 for a list of Lycoming Engines' publications.
Instructions for Continued Airworthiness
The IO-390-D Series Engine Maintenance Manual, latest revision of the Service Table of Limits -
SSP-1776, and service documents make up the complete set of Instructions for Continued
Airworthiness (ICAs). The ICAs are prepared by Lycoming Engines and are accepted by the Federal
Aviation Administration (FAA).
Compliance Requirements
WARNING
OPERATE THIS ENGINE IN ACCORDANCE WITH SPECIFICATIONS IN
APPENDIX A OF THIS MANUAL. OPERATING THE ENGINE BEYOND
SPECIFIED OPERATING LIMITS CAN CAUSE PERSONAL INJURY
AND/OR DAMAGE TO THE ENGINE.
YOU ALSO MUST COMPLETE THE NECESSARY SERVICE
PROCEDURES IDENTIFIED IN LYCOMING ENGINES' MAINTENANCE
MANUAL FOR THIS ENGINE AS WELL AS ANY APPLICABLE SERVICE
DOCUMENTS. LYCOMING ENGINES' SERVICE DOCUMENTS WRITTEN
AT A LATER DATE SUPERSEDE PROCEDURES IN THIS MANUAL.
PROCEDURES IN THE MAINTENANCE MANUALS MUST BE DONE BY
QUALIFIED PERSONNEL WITH THE REQUISITE CERTIFICATIONS.
Warning, 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 possible 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 per the
American National Standard and ANSI Z535-6-2006.
Advisory Word
DANGER:
WARNING
CAUTION
NOTICE:
NOTICE: In this manual, the word "recommended" refers to "best practices."
Introduction
Page xvi
IO-390-D Series Engine Installation and Operation Manual
Safety Advisory Conventions
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.
Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury. It can also be used without
the safety alert symbol as an alternative to "NOTICE."
The preferred signal word to address practices not related to
personal injury.
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Definition
March 2020
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