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DOT/FAA RIN: 2120-AJ34 Publication ID: Spring 2014 
Title: +Supercooled Large Droplet Icing Conditions 
Abstract: This rulemaking would amend the airworthiness standards applicable to certain transport category airplanes certificated for flight in icing conditions, and the icing airworthiness standards applicable to certain aircraft engines. The rulemaking would improve safety by addressing supercooled large drop icing conditions for transport category airplanes most affected by supercooled large drop icing conditions, mixed phase and ice crystal conditions for all transport category airplanes, and supercooled large drop, mixed phase, and ice crystal icing conditions for all turbine engines. This rulemaking is the result of information gathered from a review of icing accidents and incidents. 
Agency: Department of Transportation(DOT)  Priority: Other Significant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Final Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 14 CFR 23    14 CFR 25   
Legal Authority: 49 USC 44702    49 USC 106(g)    49 USC 40113    49 USC 44701    49 USC 44704   
Legal Deadline:
Action Source Description Date
Final  Statutory  Final Rule  11/29/2012 
Action Date FR Cite
NPRM  06/29/2010  75 FR 37311   
Comment Period Extended  08/16/2010  75 FR 49865   
NPRM Comment Period End  08/30/2010 
End of Extended Comment Period  09/29/2010 
Final Rule  09/00/2014 
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: Businesses  Federalism: No 
Included in the Regulatory Plan: No 
International Impacts: This regulatory action will be likely to have international trade and investment effects, or otherwise be of international interest.
RIN Information URL:   Public Comment URL:  
RIN Data Printed in the FR: No 
Agency Contact:
Robert Hettman
ANM-112, Transport Airplane Directorate
Department of Transportation
Federal Aviation Administration
1601 Lind Avenue SW.,
Renton, WA 98057
Phone:425 227-2683

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