DATE: August 4, 2017 MODELS AFFECTED: (1) Engines with a serial number listed in Table 1 of this Service Bulletin (2) Engines that have been overhauled or repaired that could contain connecting rod assemblies or connecting rod bushings shipped from Lycoming during dates identified in Table 2 of this Service Bulletin TIME OF COMPLIANCE: Within the next 10 hours of engine operation REASON FOR...

DATE: August 15, 1986 MODELS AFFECTED: All Avco Lycoming piston engines. TIME OF COMPLIANCE: When assembling cylinder(s) to engines.

Information: On page 7 of 9 of Service Instruction No. 1029D, the first sentence of step 8, should read as follows: 8. Using the same sequence as described in paragraphs 5 and 6, and shown in Figure 12, check all 1/2 inch nuts for tightness by bringing torque to 600 in. lb. (50 ft. lb.).

Information: On page 9 of 9 of Service Instruction No. 1029D, the wrench part number STD­375 (3/4 inch Hex head) for cylinder base nut part number STD­2090 should be wrench part number ST­375 (3/4 inch Hex head).

DATE RELEASED: June 2007 TITLE: AEIO-580-B1A Parts Catalog DOCUMENT PART NUMBER: PC-701-2

DATE: April 10, 1987 MODELS AFFECTED: GO-435, GO-480, IGO-480. GSO-480, IGSO-480. IGO-540, IGSO-540, VO-540. TIGO-541. TIME OF COMPLIANCE: At all times during engine operation including ground running.

REPRINT OF HARTZELL ENGINE TECHNOLOGIES' SERVICE BULLETIN ASB 069 DATE: August 29, 2017 MODELS AFFECTED: Table 2 in this Service Bulletin TIME OF COMPLIANCE: Next maintenance event not to exceed 25 hours or before further flight if fuel leak found during preflight inspection

DATE RELEASED: February 2017 TITLE: IO-360-P1A Engine Installation and Operation Manual DOCUMENT PART NUMBER: IOM-IO-360-P1A

DATE RELEASED: February 2017 TITLE: IO-360-P1A Maintenance Manual DOCUMENT PART NUMBER: MM-IO-360-P1A