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May 5, 2011

Applicability: This Service Bulletin applies to RSA-5AB1, RSA-10AD1, RSA10DB1, RSA-10DB2, RSA-10Ed1 and RSA-10ED2 fuel servos overhauled or manufactured by AVStar Fuel Systems (AVStar) between May 21, 2010 and October 19, 2010. It also applies to fuel servos of any make (AVStar, Bendix, Precision, etc.) overhauled by others using AVStar Value Kits (P/N's AVK-5AB1, AVK-5AD1, AVK-10AD1, AVK-10ED1 and AVK-10ED2) and/or Fuel Diaphragms (P/Ns AV2541801 and AV2541803) purchased from AVStar between May 21, 2010 and October 19, 2010. A list of serial numbers of servos and lot numbers of the diaphragm assemblies affected by this Bulletin are included as Attachments A and B and further can be found on our website at

Reason for Publication: There has been a report of a possible failure after 19 hours of an RSA-10ED1 fuel servo overhauled by AVStar that may involve the fuel diaphragm assembly. See complete Service Bulletin for additional information.

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