DATE: September 16, 2002 MODELS AFFECTED Those Lycoming TIO and LTIO-540 engines listed in Table 1 below. Any field overhauled Lycoming TIO and LTIO-540 engine rated at 300 horsepower or higher that has a crankshaft installed with a serial number listed in Table 2. Any Lycoming IO-540 engine that has an aftermarket turbocharger installed under an STC and has a crankshaft serial number listed in...

DATE: September 5, 2002 Lycoming Service Bulletin No. 552 requires replacement of crankshafts in some turbocharged Lycoming TIO and LTIO-540 engines rated at 300 horsepower or higher.

Supersedes and Replaces Service Bulletin No. 550 DATE: August 16, 2002 MODELS AFFECTED Service Bulletin No. 552 applies only to TIO and LTIO-540 engines rated at 300 horsepower or higher. Engines that previously complied with Service Bulletin No. 550 are also affected by Service Bulletin No. 552. TIME OF COMPLIANCE Before further flight. Lycoming has received several field reports of broken...

Supersedes Service Bulletin No. 529 A June 10, 2002 MODELS AFFECTED All Lycoming aircraft engines employing new or overhauled “AN” rotary fuel pump model series RG9080, RG9570 and RG17980, including: IO-320, LIO-320; IO-360, HIO-360, TIO-360; GO-435; GO-480, IGO-480; IO-540, AEIO-540, HIO-540, TIO-540, LTIO-540, IGO-540, TIVO-540; TIGO-541; IO-720 engine models. (See Effectivity for Service...

DATE: October 5, 2001 This Supplement No. 1 to Service Bulletin No. 549, Dated March 23, 2001, Engine/Crankshaft Inspection for 4-cylinder crankshafts in –360 series engines, extends the warranty reimbursement for compliance costs to December 31, 2001.

Supersedes Service Bulletin No. 545 October 2, 2001 MODELS AFFECTED I. All Textron Lycoming TIO-540-AJ1A and IO-540-AC1A5 aircraft engines shipped from the factory before October 30, 2000, unless Kit P/N 05K23081 has been installed. II. All Textron Lycoming TIO-540-AJ1A and IO-540-AC1A5 aircraft engines that have had Kit P/N 05K23081 installed before May 1, 2001. TIME OF COMPLIANCE I. Inspect...

DATE: March 23, 2001 MODELS AFFECTED See Attachment I for affected engine/crankshaft serial numbers. TIME OF COMPLIANCE Within the next 100 hours of operation but not to exceed 180 days from the date of this Service Bulletin. Textron Lycoming has identified a potential metallurgical condition on a number of 4-cylinder crankshafts that shipped from the factory May 1, 1997 through April 30, 2000...

DATE: March 7, 2001 MODELS AFFECTED I. Any Textron Lycoming model TIO-540-AE2A engine listed on ATTACHMENT I that has not complied with the connecting rod bearing replacement requirement of Special Advisory No. 59-800. II. Except if replaced in compliance with Special Advisory No. 59-800, any TIO-540- AE2A engine known to have had connecting rod bearings field replaced after August 25, 1995. TIME...

Supersedes Service Bulletin No. 539 and Supplement No. 1 November 22, 2000 MODELS AFFECTED Those Textron Lycoming aircraft engines shipped before December 11, 1999, that employ Crane/Lear Romec rotary fuel pump models identified below. TIME OF COMPLIANCE Same as that required for Crane/Lear Romec Service Bulletins No. RG9080- 73-001, No. RG9570- 73-001, and No. RG17980-73-001. Crane/Lear Romec...