§ 831.1 Applicability of this subpart.

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Title 49—Transportation > Subtitle B—Other Regulations Relating to Transportation > CHAPTER VIII—NATIONAL TRANSPORTATION SAFETY BOARD > PART 831—INVESTIGATION PROCEDURES > Subpart A—General

This text was captured on Sep 22, 2026. It is a snapshot, not a live feed, so check the official code before relying on it.

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(a) Except as provided in Subpart E of this part regarding marine casualties, and unless specified by the National Transportation Safety Board (NTSB), the provisions of this subpart apply to all NTSB investigations conducted under its statutory authority.

(b) Consistent with its statutory authority, the NTSB conducts investigations of transportation accidents that include, but are not limited to: accidents, collisions, crashes, derailments, explosions, incidents, mishaps, ruptures, or other similar accidents. Use of the term “accident” throughout this part includes all such occurrences.

(c) Throughout this part, the term “IIC” means the NTSB investigator-in-charge.

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