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KNOWLEDGE BASE

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Service Instructions | 02.10.26
Service Instruction No. 1575 A

New Connecting Rod Bushing

Service Instructions | 02.10.26
Service Instruction No. 1366 B

Repair Procedure for Worn Rocker Shaft Bushing Hole

Service Instructions | 02.10.26
Service Instruction No. 1014 P

Lubricating Oil Recommendations

Service Bulletins | 02.10.26
Service Bulletin No. 665

Heat Shield Removal

Service Bulletins | 02.10.26
Service Bulletin No. 533 D

Recommended Action for Sudden Engine Stoppage, Propeller/Rotor Strike or Loss of Propeller/Rotor Blade or Tip

Service Instructions | 01.28.26
Service Instruction No. 1042 AI

APPROVED SPARK PLUGS

Maintenance Manuals | 01.15.26
iE2 Series EECS Engine Wiring Harness Inspection and Repair Manual

Lycoming Part Number: IRM-iE2

Installation & Operator Manuals | 01.15.26
TEO-540-C1A Engine Installation & Operations Manual Rev 5

DOCUMENT PART NO. IOM-TEO-540-C1A REV 5

Maintenance Manuals | 01.15.26
TEO-540-C1A Engine Maintenance Manual Rev 5

DOCUMENT PART NO. MM-TEO-540-C1A REV 5

Service Letters | 01.15.26
Service Letter No. L 114 BL

Reciprocating Engine and Accessory Maintenance Publications

Service Letters | 01.06.26
Service Letter No. L299

Retirement of Two Configurations of IO-390-C3B6 Engines

Service Instructions | 11.24.25
Service Instruction No. 1368 A

Tachometer Adapter Seal Washer and Retainer

Service Bulletins | 11.24.25
Special Service Publication No. 525

SSP-525 Valve Sticking - Early Warning Signs and Indications

Service Instructions | 11.24.25
Service Instruction No. 1481 C

Factory Engine Preservation

Service Letters | 11.18.25
Service Letter No. 298

iE2 Engine Driven Fuel Pump Leak

Service Instructions | 11.18.25
Service Instruction No. 1443 T

Approved Slick Magnetos, Hartzell PowerUp Magnetos, and Lycoming Electronic Ignition System (EIS) on Lycoming Engines

Service Bulletins | 11.05.25
Service Bulletin No. 664

Piston Pin Replacement

Service Letters | 09.24.25
Service Letter No. L291

Substitution of Turbocharger

Service Instructions | 09.24.25
Service Instruction No. 1129 E

Methods of Checking DC Alternator and Generator Belt Tension

Service Instructions | 09.24.25
Service Instruction No. 1080 D

Required Maintenance Items for Specific Components

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Lycoming Engines is an Operating Division of Avco Corporation. ©2026 Avco Corporation.