Service Bulletin No. 557

DATE: May 7, 2003

MODELS AFFECTED

This Service Bulletin applies to new, rebuilt, overhauled or repaired Lycoming fuel injected engines shipped from Lycoming between January 30, 2003 and May 5, 2003 equipped with Precision Airmotive Corporation fuel injection servos, Model RSA-5 or RSA-10 identified in Precision Service Bulletin No. PRS-105. Fuel injected engines are identified by the letter “I” in the prefix.

This Service Bulletin also affects Lycoming engines that have had a field replacement of or been field overhauled to employ a Precision Airmotive Corporation fuel injection servo identified in Precision Service Bulletin No. PRS-105.

This Service Bulletin also affects Precision Airmotive Corporation fuel injector servos identified in Precision Service Bulletin No. PRS-105 purchased as spares from Lycoming between January 30, 2003 and May 5, 2003.

TIME OF COMPLIANCE

Same as that required for Precision Airmotive Corporation Service Bulletin No. PRS-105.

If “Models Affected”, above, applies to your Lycoming fuel injected engine or a Precision fuel injector purchased from Lycoming, check the injector serial number against the list in Section II of Precision Airmotive Corporation Service Bulletin No. PRS-105.