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

KNOWLEDGE BASE

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Service Bulletins | 03.08.12
Service Bulletin No. 602 

Incorrect Part Numbers on Service Instruction No. 1098G

Service Instructions | 03.06.12
Service Instruction No. 1458 G

Connecting Rod Bolts

Service Instructions | 02.27.12
Service Instruction No. 1414 B

Bendix Service Bulletin No. RS­77, Rev. 2 

Service Bulletins | 02.23.12
Service Bulletin No. 240 W 

Mandatory Parts Replacement at Overhaul and During Repair or Maintenance

Service Instructions | 02.23.12
Service Instruction No. 1543 

Notification of Approved Tappet P/N 15B26262 

Service Instructions | 02.01.12
Service Instruction No. 1457 A 

Optional Remote­Mounted Oil Filter Kits

Parts Catalog | 12.31.11
O-320-B & -D Parts Catalog

Document Part No. PC-203-9

Service Instructions | 12.13.11
Supplement No. 1  To  Service Instruction No. 1535 

Counterweight and Roller Removal, Inspection, and Installation 

Parts Catalog | 11.30.11
O-320-E2B & -E2C Parts Catalog

Document Part No. PC-203-5

Parts Catalog | 11.30.11
O-320-E2G Parts Catalog

Document Part No. PC-203-7

Parts Catalog | 11.30.11
O-320-E2H & -E3H Parts Catalog

Document Part No. PC-203-8

Service Bulletins | 11.22.11
Service Bulletin No. 601

Non-Compliant Oil Fill Tubes P/N 77527

Service Instructions | 11.10.11
Service Instruction No. 1143 C

Counterweight Bushing Inspection, Replacement, and Special Tooling Upgrades

Parts Catalog | 10.31.11
O-320-E1F, & -E2F Parts Catalog

Document Part No. PC-203-4

Parts Catalog | 10.31.11
O-320-E1A & -E2A Parts Catalog

Document Part No. PC-203-3

Service Instructions | 10.31.11
Service Instruction No. 1535 

Counterweight and Roller Removal, Inspection, and Installation

Parts Catalog | 09.30.11
O-320-E2D & -E3D Parts Catalog

Document Part No. PC-203-6

Parts Catalog | 08.31.11
O-320-A2C & -A2D Parts Catalog

Document Part No. PC-203-2

Service Letters | 08.02.11
Service Letter No. 220 C

Wide Deck Cylinder Configuration on Lycoming Engines

Parts Catalog | 07.31.11
O-320-A2B & -A3B Parts Catalog

Document Part No. PC-203-1

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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