Service Bulletin No. 369 S

ENGINE INSPECTION AFTER OVERSPEED
DATE:

April 9, 2020

SUBJECT:

Engine Inspection after Overspeed

MODELS AFFECTED:

All Lycoming piston engines.

TIME OF COMPLIANCE:

As required by the subject bulletin.

REASON FOR REVISION:

Added new engine model IO-390-D to Table 1. Added new steps in Table 4 to include EIS Overspeed. Added a new NOTICE before the Magneto Overspeed Inspection section. Added a new section for EIS Overspeed Inspection.

Service Instruction No. 1070 AB

SPECIFIED FUELS FOR SPARK-IGNITED GASOLINE AIRCRAFT ENGINE MODELS
DATE:

April 8, 2020 

SUBJECT:

Specified Fuels for Spark-Ignited Gasoline Aircraft Engine Models

MODELS AFFECTED:

Lycoming engine models as detailed in Table 3

TIME OF COMPLIANCE:

When refueling aircraft

REASON FOR REVISION:

Added listings for IO-390-D to Table 3

IO-390-D Series Engine Maintenance Manual (Principal Manual) (Rev 1)

DATE RELEASED:

June 2024

TITLE:

IO-390-D Series Maintenance Manual (Principal Manual) (Rev 1)

DOCUMENT PART NUMBER:

Part No. MM-IO-390-D Series

 

MM-IO-390-D Series

  • IO-390-D Series Maintenance Manual – Revision 1
    • Update changes requested since original release.  Changes made in following chapters:
    • Airworthiness Limitations Sections
    • 05-00
    • 12-30
    • 72-30
    • 74-30

Service Bulletin No. 639

Service Bulletin No. 639
Inspection of Rocker Arm, Part Number LW-15014

January 17, 2020

MODELS AFFECTED

O-320-H2AD, O, LO, TO, LTO-360-E1A6D new, rebuilt, or overhauled engines shipped from Lycoming since June 2017 with less than 500 hours of operation or engines with less than 500 hours of operation since rocker arm replacement.

TIME OF COMPLIANCE

At next scheduled oil change, then every 50 hours until 500 hours of engine operation.

Service Letter No. 279

SUBJECT:  LYCOMING MODEL DESIGNATION FOR FUEL INJECTORS
DATE:

October 10, 2019

TO:

All Owners and Operators of Lycoming Piston Aircraft Engines

Lycoming Engines’ naming convention for fuel injector model designations is identified in the table of Service Letter Number 279. The naming convention is intended to describe the general feature set specification of the fuel injector and does not constitute the complete specification of the product.           

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