Publications

Lycoming furnishes service, repair and maintenance information in the form of Overhaul Manuals, Operator's Manuals, Illustrated Parts Catalogs, and various System, Accessory, and Instruction documents. Lycoming Service Letter SL-L114AU (PDF) "Reciprocating Aircraft Engine and Accessories Maintenance Publications" , which lists specific available Lycoming support publications with prices and ordering information, is revised and updated on a regular basis.

In addition to the standard support publications, Lycoming provides special service information, as required, in the form of Service Bulletins, Service Letters, and Service Instructions. Lycoming SSP-206 "Service Bulletins, Letters, and Instructions Index" lists these special publications, both alphabetical and by engine model application.

Lycoming support publications and subscription/revision services are available from Lycoming Distributors or direct from the factory in hard copy, microfiche or CD format.

Service Bulletins

Service Bulletins describe procedures that must be observed for safety reasons. They are readily identifiable by the Mandatory Service Bulletin heading printed in red.

Latest Service Bulletins:

SB-201F
Inspection of Crankshaft Flange

SB-604
Compliance with Hartzell Engine Technologies (HET), LLC (Previously Kelly Aerospace) Alert Service Bulletin No. 048

SB-603 Supplement One
Reprint of Slick Service Bulletin SB-112

SB-603
Reprint of Slick Service Bulletin SB-112

View Additional Service Bulletins

Service Letters

Service Letters are issued to explain service policies and to introduce new or revised products and processes approved for Lycoming engines.

Latest Service Letter:

Service Letter No. SL-114AV
Reciprocating Engine and Accessory Maintenance Publications

Service Letter No. SL253
Warranty Repair of AvStar Fuel Systems, Inc. Fuel Control Products

Service Letter No. SL247A Supplement 1
Shelf Life Requirements

Service Letter No. SL247A
Shelf Life Requirements

View Additional Service Letters

Service Instructions

Service Instructions describe modifications, processes and other information pertinent to the maintenance, repair, and overhaul of Lycoming engines.

Latest Service Instruction:

SI-1553
Additional Cylinder Fin Stabilizer

SI-1454A Supplement 1
Rocker Arm Assembly Replacement Part

SI-1408B
Engine Mount Bracket Replacement

SI-1532A
Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines

View Additional Service Instructions

Maintenance Libraries

Lycoming offers sets of publications, with available subscription and revision service in both hard copy and electronic form. The complete Maintenance Libraries include Overhaul Manuals, Operator's Manuals, Illustrated Parts Catalogs, Bulletin/Letter/Instruction sets, and various additional and special publications. Individual components are available separately.

For a listing of complete or specific publication sets, and ordering procedures, see Lycoming Service Letter L114, "Reciprocating Engine and Accessories Maintenance Publications" .

Publications on CD

Lycoming engine owners, operators, A&P mechanics, maintenance technicians, FBO's, pilots and instructors can purchase Lycoming maintenance publications in a convenient, easy-to-use, navigable CD-ROM.