This AD requires replacing certain crankshafts. The FAA is adopting a new airworthiness directive (AD) for certain Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, O-540, IO-540, AEIO-540, (L)TIO-540, IO-580, and IO-720 series reciprocating engines.

Prohibition Against Installing Certain Crankshaftsįederal Aviation Administration (FAA), Department of Transportation (DOT).

Engines for Which No Action Is Required.

Lycoming Engines Should Pay Regardless of Calendar Time.

No Reason To Change Lycoming Engines Current Compliance Conditions.

Suggest Crankshaft Fractures Noted Are From an As-Yet Unidentified Cause.

Evidence for AD Is Not Convincing Enough.

Deadline for Crankshaft Replacement Needs To Be at the Next Overhaul.

Consider an Additional 100 Hours Operation.Engine Model Included in Error in Proposed AD.12-Year Overhaul Limit Not in Lycoming Engines Service Instruction (SI) No.Need To Correct the Table of Engine Models and Aircraft.Suggest to Only Reference 360-Series Engines.This repetition of headings to form internal navigation links Headings within the legal text of Federal Register documents. This table of contents is a navigational tool, processed from the Provide legal notice to the public or judicial notice to the courts. Rendition of the daily Federal Register on does not Until the ACFR grants it official status, the XML Legal research should verify their results against an official edition of The official SGML-based PDF version on, those relying on it for The material on is accurately displayed, consistent with While every effort has been made to ensure that Regulatory information on with the objective ofĮstablishing the XML-based Federal Register as an ACFR-sanctioned

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Lycoming Engine Serial Number Lookup