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

KNOWLEDGE BASE

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Reference Documents | 03.26.24
SPECIAL SERVICE PUBLICATION NO. 124

Operating Recommendations for TEO-540-C1A in Tecnam P2012 Traveller

Service Letters | 03.21.24
Service Letter No. L 267 A

Warranty and Owner Registration via Lycoming Engines Website

Reference Documents | 02.19.24
SPECIAL SERVICE PUBLICATION NO. 875-2

Removal and Installation Labor Allowance Guidebook

Service Instructions | 02.14.24
Service Instruction No. 1588

Rocker Box Cover Screws Torque Values and Torque Sequence

Service Letters | 02.14.24
Service Letter No. L 272 B

Release of New Silicone Rocker Cover Gaskets

Reference Documents | 01.05.24
Service Bulletin No. 650

Intake Pipe and Flange Inspection

Service Bulletins | 01.04.24
Service Bulletin No. 655 - Undersized Turbocharger Journal Bearing

Hartzell Engine Tech (HET) Service Bulletin (SB) No. 203

Reference Documents | 12.29.23
Special Service Publication No. SSP-112-14

INDEX OF SERVICE BULLETINS, SERVICE INSTRUCTIONS AND SERVICE LETTERS

Service Letters | 12.29.23
Service Letter No. L 279 A

Lycoming Model Designation for Fuel Injectors

Service Letters | 12.15.23
Service Letter No. L 114 BK

Reciprocating Engine and Accessory Maintenance Publications

Service Instructions | 12.13.23
Service Instruction No. 1532 N

Approved Fuel Injectors, Fuel Manifold Assemblies, and Fuel Nozzle Assemblies for Lycoming Engines

Service Instructions | 12.01.23
Service Instruction No. 1589

Exhaust Bypass Valve Assembly Replacement

Service Instructions | 12.01.23
Service Instruction No. 1585 A

Oil Cooler Bypass Valve Assembly Replacement

Service Letters | 11.14.23
Service Letter No. L 293

Air Temperature Sensor P/N 60C28409

Service Bulletins | 09.13.23
Service Bulletin No. 653

Hartzell Engine Tech (HET) Alert Service Bulletin (ASB) No. 098

Reference Documents | 09.13.23
Special Service Publication No. SSP-122 Rev. 1

Field Service Tool User Manual & Troubleshooting Guide

Service Instruction No. 1472 | 03.02.23
Service Instruction No. 1472

Removal of preservative oil from engine

Service Instructions | 03.01.23
SI 1577 Questionnaire

Service Instructions | 02.10.23
Service Instruction No. 1577 A

INTAKE VALVE IN-SERVICE DATA

Service Instructions | 02.10.23
Service Instruction No. 1324 D

CRANKSHAFT OIL SEALS

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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