DATE RELEASED: January 1985 TITLE: IO, AIO, LIO & AEIO-320 Parts Catalog DOCUMENT PART NUMBER: PC-303

DATE RELEASED: August 1991 TITLE: O-540 (WFC) Parts Catalog DOCUMENT PART NUMBER: PC-515

DATE RELEASED: March 1994 TITLE: O-540-J & -L Parts Catalog DOCUMENT PART NUMBER: PC-415-1

DATE RELEASED: June 1981 TITLE: IGO & IGSO-540 Parts Catalog DOCUMENT PART NUMBER: PC-116

Wuhan, China – 9 March 2017 Lycoming Engines, an operating division of Avco Corporation (a Textron Inc. (NYSE: TXT) business), successfully held its 2017 Customer Training Seminar in Wuhan Hangda Group from 27 February to 3 March. The training was delivered by Adrian McHardy, Lycoming’s regional manager of Asia Pacific, Middle East and Africa. McHardy has worked for Lycoming Engines for more than...

DATE RELEASED: April 5, 2017 TO: All Owners and Operators of Lycoming Direct Drive Engines REASON FOR SERVICE LETTER: This Service Letter identifies extended maintenance intervals as benefits of routine exclusive use of approved unleaded fuels identified in the latest revision of Service Instruction No. SI-1070 for Lycoming engine models.

DATE: May 4, 2017 MODELS AFFECTED: Lycoming engines using a thermostatic oil cooler bypass valve TIME OF COMPLIANCE: At overhaul or when necessary to replace the thermostatic oil cooler bypass valve REASON FOR REVISION: Clarify replacement valve part numbers for specific Lycoming engine models

May 25, 2017 MODELS AFFECTED: All Lycoming engine models including electronically-controlled engines TIME OF COMPLIANCE: Anytime aircraft is struck by lightning

May 25, 2017 MODELS AFFECTED: All Lycoming direct drive and TIGO-541 piston engines TIME OF COMPLIANCE: As per the schedule in Table 1