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DOT/FAA RIN: 2120-AF75 Publication ID: Fall 1998 
Title: Rain and Hail Ingestion Standards 
Abstract: This action makes changes to the water and hail ingestion standards for aircraft turbine engines. This rulemaking addresses an engine power-loss instability phenomena attributed to operation in extreme rain or hail that is not adequately addressed by current requirements. This rule also harmonizes with requirements being drafted by the Joint Aviation Authorities (JAA). These changes will establish one set of common requirements, thereby reducing the hardship on the United States and worldwide aviation industry, by eliminating the need for manufacturers to comply with different sets of standards when seeking validation from the FAA and JAA. 
Agency: Department of Transportation(DOT)  Priority: Substantive, Nonsignificant 
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Completed Actions 
Major: No  Unfunded Mandates: No 
EO 13771 Designation: uncollected 
CFR Citation: 14 CFR 33   
Legal Authority: 49 USC 106(g)    49 USC 40113    49 USC 44701 to 44702    49 USC 44704   
Timetable:
Action Date FR Cite
NPRM  08/09/1996  61 FR 41688   
NPRM Comment Period End  11/07/1996    
Final Action  03/26/1998  63 FR 14794   
Final Action Effective  04/30/1998    
Additional Information: roject Number: ANE-93-734A. This action is in response to an Aviation Rulemaking Advisory Committee recommendation. ^PANALYSIS: Regulatory Evaluation, 08/09/96, 61 FR 41688^PRegulatory Evaluation, 03/26/98, 63 FR 14794
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: Businesses 
Included in the Regulatory Plan: No 
Agency Contact:
Thomas Boudreau
Aircraft Certification Service
Department of Transportation
Federal Aviation Administration
12 New England Executive Park,
Burlington, MA 01803-5299
Phone:617 238-7117