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NTSB RIN: 3147-AA01 Publication ID: Fall 2016 
Title: Investigation Procedures 

The National Transportation Safety Board (NTSB) published a Notice of Proposed Rulemaking (NPRM) on August 12, 2014, which proposed to revise 49 CFR part 831. Part 831 contains the NTSB's investigation procedures. The proposed revisions updated various terms and other outdated information; organized the part into mode-specific subparts; and described the investigative party process in a more accurate manner than the descriptions contained in the current version of part 831. Comments concerning the NPRM were due October 31, 2014. The NPRM and all comments the NTSB received, as well as other associated documents, are available at


The NTSB plans to divide revised part 831 into subparts A through E. Subparts A through D, which contain general investigation provisions and mode-specific procedures for aviation, highway, railroad, pipeline, and hazardous materials investigations, will be promulgated in the Final Rule associated with the August 12, 2014 NPRM and this RIN (AA01). The NTSB plans to issue a second NPRM for subpart E, which will contain mode-specific procedures for marine investigations. The NPRM for subpart E and all future activities related to subpart E will be contained in new RIN 3147-AA16.


Agency: National Transportation Safety Board(NTSB)  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: 49 CFR 831   
Legal Authority: 49 U.S.C. 1113(f)   
Legal Deadline:  None
Action Date FR Cite
NPRM  08/12/2014  79 FR 47064   
NPRM Comment Period End  10/31/2014 
Split RIN Into 3147-AA01 and 3147-AA16  08/24/2016 
Final Rule  12/00/2016 
Additional Information: To view the NTSB's plan for retrospective analysis of its rules, as well as comments received in response to the NTSB's plan to update 49 CFR part 831, please see Docket No. NTSB-GC-2012-0002 at
Regulatory Flexibility Analysis Required: No  Government Levels Affected: None 
Small Entities Affected: No  Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Ann Gawalt
Deputy General Counsel
National Transportation Safety Board
490 L'Enfant Plaza SW.,
Washington, DC 20594
Phone:202 314-6080