AVStar Flow Divider (Lycoming Fuel Manifold) Inspection DATE: December 20, 2017 MODELS AFFECTED: Refer to Tables 1 and 2 TIME OF COMPLIANCE: 10 hours of engine operation or sooner if experiencing reduced fuel flow

Oil Level Gage (Dipstick) Replacement DATE: December 20, 2017 MODELS AFFECTED: Lycoming Engines TIO-540-AH1A installed in Gripps Aero/Mahindra Turbocharged GA8 Airvans TIME OF COMPLIANCE: At owner's discretion, during next scheduled maintenance event

Service Instruction No. 1514 D SUBJECT Roller Tappets Part Information Update DATE February 05, 2018 MODELS AFFECTED Lycoming new, rebuilt and overhauled 4 and 6 cylinder aircraft engines with the new roller tappet configuration TIME OF COMPLIANCE Whenever the new roller tappet engines are serviced

Warranty Repair of AVStar Fuel Systems, Inc. Fuel Control Products Date: April 16, 2018 TO: All Owners and Operators of Lycoming Piston Aircraft Engines SUBJECT: Warranty Repair of AVStar Fuel Systems, Inc. Fuel Control Products REASON FOR REVISION: Update AVStar warranty information sheet, and contact information.

DATE RELEASED: October 2017 TITLE: HIO-390-A1A Maintenance Manual DOCUMENT PART NUMBER: MM-HIO-390-A1A

DATE RELEASED: May 2018 TITLE: HIO-390-A1A Illustrated Parts Catalog DOCUMENT PART NUMBER: PC-HIO-390-A1A

DATE RELEASED: October 2017 TITLE: HIO-390-A1A Installation & Operations Manual DOCUMENT PART NUMBER: IOM-HIO-A1A

EXHAUST SYSTEM INSPECTION DATE: May 17, 2018 SUBJECT: Exhaust System Inspection MODELS AFFECTED: Lycoming Engine Model TIO-540-AJ1A TIME OF COMPLIANCE: If the Exhaust System is not replaced per this revision, after the initial Exhaust System Inspection, continue with subsequent repetitive Exhaust System Inspections per Table 2 in this Service Bulletin REASON FOR REVISION: Refined language on Page...

Warranty Procedure for Exhaust System Replacement Referenced in the most current revision of SB 627 DATE: May 17, 2018 TO: All Owners and Operators of Lycoming Engines Model TIO-540-AJ1A SUBJECT: Warranty Procedure for Exhaust System Replacement Referenced in the most current revision of SB627 REASON FOR REVISION: Updated language to refer to the most current revision of SB627