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DOT/FAA RIN: 2120-AK83 Publication ID: Spring 2023 
Title: Medium Flocking Bird Test at Climb Condition 
Abstract: The FAA is amending certain airworthiness regulations to add a new test requirement addressing engine bird ingestion. This rule would ensure that turbofan engines can ingest the largest medium flocking bird into the engine core at climb conditions. This final rule requires that, to obtain certification of a turbofan engine, a manufacturer must show the engine core can continue to operate after ingesting such a bird while operating at a lower fan speed associated with climb or approach. 
Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 14 CFR 3376   
Legal Authority: 49 U.S.C. 106(g)    49 U.S.C. 40113    49 U.S.C. 44701    49 U.S.C. 44702    49 U.S.C. 44704   
Legal Deadline:  None
Action Date FR Cite
NPRM  07/06/2018  83 FR 31479   
NPRM Comment Period End  09/04/2018 
Final Rule  06/00/2023 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: Undetermined 
Small Entities Affected: Organizations  Federalism: No 
Included in the Regulatory Plan: No 
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Phillip Haberlen
Department of Transportation
Federal Aviation Administration
800 Independence Avenue, NW,
Washington, DC 20591
Phone:781 238-7770