Service Bulletin No. 581 A

November 19, 2009

MODELS AFFECTED

Engines Shipped From Lycoming: All new, overhauled, rebuilt, or repaired (L)IO, AIO, HIO, IGO, IVO, (L)TIO, AEIO series engines with either a Precision Airmotive or Bendix RSA-5 or RSA-10 series Fuel Injection Servo, or a Precision Airmotive Silverhawk EX Fuel Injection Kit shipped from Lycoming between August 22, 2006 and April 2, 2008.

Spares Shipped From Lycoming: All new, overhauled, or rebuilt Precision Airmotive or Bendix RSA-5 or RSA-10 series Fuel Injection Servos shipped from Lycoming between August 22, 2006 and April 2, 2008. All Precision Airmotive Silverhawk EX Fuel Injection Kits shipped from Lycoming between August 22, 2006 and April 2, 2008.

Spares Containing Precision Gasket P/N 365533: All new, overhauled, rebuilt, or repaired Precision Airmotive RSA-5 or RSA- 10 series Fuel Injection Servos, or Precision Airmotive Silverhawk EX Fuel Injection Kits, whether provided by Lycoming or others, that had Precision gasket P/N 365533 replaced after August 22, 2006.

Lycoming has learned that all new, overhauled, rebuilt, or repaired engines with a Precision Airmotive or Bendix RSA-5, RSA-10 series fuel injection servo, or a Precision Airmotive Silverhawk EX Fuel Injection Kit installed since August 22, 2006 may have a loose brass hex plug. A loose plug will allow a leak which may have an effect on engine performance. If the plug completely falls out of the regulator cover, a loss of engine power will result.