What the NTSB Investigation Does — and Does Not — Decide
The NTSB's work and a civil claim run on separate tracks, even though they look at the same event.
The NTSB investigates to find the probable cause of an accident. That is its formal conclusion about why the accident happened, stated for safety purposes. A preliminary report comes early and sets out initial facts. It does not state a probable cause. A final report comes after the full investigation, and the probable cause appears there. While an investigation is open, no probable cause has been stated. A preliminary report is not a finding of cause, and anyone treating it as one is getting ahead of the NTSB.
Federal law also draws a firm line between these reports and a damages case. Under 49 U.S.C. § 1154, subsection (b) states: "No part of a report of the Board, related to an accident or an investigation of an accident, may be admitted into evidence or used in a civil action for damages resulting from a matter mentioned in the report."
So the outcome of the investigation does not decide a civil claim either way. A survivor's case has to build its own record of what happened and why. If the investigation is still open when a survivor or family begins to think about legal action, that does not by itself stop a civil claim from going forward. The claim and the investigation move on their own schedules.
The same statute also limits cockpit recordings, which comes up in the evidence section below.
For families after an accident involving an air carrier, a company that carries passengers or cargo for pay, a separate law applies. 49 U.S.C. § 1136 requires the NTSB to name a director of family support services as a point of contact and to designate an independent nonprofit organization, with experience in disasters and posttrauma communication with families, to coordinate the emotional care, psychological care, and family support services of passengers and their families. This applies to accidents within its terms that result in a loss of life and that the NTSB leads. The NTSB must also, as far as practicable, brief families before any public briefing about the accident, its causes and other findings. The statute adds that, for accidents it covers involving an air carrier providing interstate or foreign air transportation, or a foreign air carrier in the United States, no unsolicited communication about a potential personal injury or wrongful death action may be made by an attorney or potential party to an injured person or a relative "before the 45th day following the date of the accident."