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LYCOMING ENGINES
652 Oliver Street
Williamsport, PA 17701
1-800-258-3279

KNOWLEDGE BASE

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Service Bulletins | 05.07.15
Supplement No. 1 To Service Bulletin No. 608

Service Bulletins | 04.09.15
Service Bulletin No. 619

Hardness Check for Rocker Arm, Part Number LW-15014

Parts Catalog | 03.31.15
IO-540-D4B5 Parts Catalog

Document Part No. PC-IO-540-D485

Service Letters | 03.11.15
Service Letter No. 263

Discolored Paint on Cylinder

Parts Catalog | 01.31.15
IO-540-K1A5 Parts Catalog

Document Part No. PC-IO-540-K1A5

Service Letters | 12.31.14
Service Letter No. 262

New Piston Ring Part Numbers

Service Instructions | 11.26.14
Service Instruction No. 1559

Adjusting Fuel Pressure on AN-Drive Type Fuel Pumps

Service Bulletins | 10.10.14
Service Bulletin No. 614 A

Exhaust System Inspection and Turbocharger Mounting Bracket Replacement

Service Bulletins | 10.10.14
Supplement No. 1 to Service Bulletin No. 530 B

Service Instructions | 09.09.14
Service Instruction No. 1406 E

Crankcase Parts for Use with Large-Diameter Hydraulic Lifters

Service Instructions | 06.05.14
Service Instruction No. 1562

Turbocharged Exhaust System Installation

Service Instructions | 05.09.14
Service Instruction No. 1141 A

Replacement of Worn Starter Ring Gears

Service Instructions | 05.07.14
Service Instruction No. 1554

Zip Strap Replacement

Service Letters | 04.23.14
Service Letter No. 261 A

Alternate Carburetor

Service Instructions | 03.21.14
Service Instruction No. 1558

New Piston Ring Part Numbers

Service Bulletins | 03.06.14
Service Bulletin No. 613 

Compliance  with Hartzell Engine  Technologies (HET), LLC (Previously  Kelly Aerospace) Alert Service Bulletin No. 057 dated 2/11/14, Turbocharger  Back Plate Assembly P/N 406795­0058 Replacement 

Service Bulletins | 02.13.14
Service Bulletin No. 606

Correction of Engine Data Plate on IO-540-AE1A5 Engines

Service Bulletins | 02.06.14
Service Bulletin No. 608

Replacement of Hartzell Engine Technologies' Fuel Pump Assemblies

Service Letters | 01.23.14
Service Letter No. 259

Product Improvements on Lycoming Carburetor P/N 61C26051

Service Bulletins | 01.23.14
Supplement 2 to Service Bulletin No. 342 G

Fuel Line and Support Clamp Inspection and Installation

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Lycoming Engines is an Operating Division of Avco Corporation. ©2025 Avco Corporation.

LYCOMING ENGINES
652 Oliver Street
Williamsport, PA 17701
1-800-258-3279