Help with CAROL

​​​​ CAROL (Case Analysis and Reporting Online), allows you to search NTSB investigations and recommendations data across all modes. Future enhancements will include improved access to docket items as well.

CAROL works in all modern browsers.

To help you find data, we're providing information to explain your search options regarding our products. Get to know CAROL below.


​For aviation investigation information covering the years 1962 to 1982, use the legacy Aviation Database Query.

​For Aviation investigations since 1983, use ​CAROL.

​Investigative data from 2010 through the present from rail, pipeline, hazardous materials, highway and marine is available in CAROL.​

Safety Recommendations

CAROL replaces the previous Safety Recommendations Database search. You can search all of the NTSB’s over 15,000 safety recommendations using ​CAROL. To learn more about searching recommendations, visit our ​ Safety Recommendations Page​​.

Investigation Dockets

​To search for accident dockets across all modes, use our comprehensive Accident Docket Search. In the future, docket search capability will be covered within the CAROL tool.


CAROL enhances the database search process on You can search data by:

  • SIMPLE SEARCH, which allows you to search selection of fields from three categories: (1) Common Investigation Fields (2) Aviation Investigation Fields (3) Safety Recommendation Fields​.​
  • ADVANCED SEARCH, which allows you to build custom searches by selecting from a variety of investigation and recommendation fields. You can select whether to display results that match any or all of your individual query rules, or group your rules so results match any or all of the multiple rules in your grouping​.​
  • PUBLISHED SEARCHES, which allows you to view already published popular searches on topics such as safety recommendations associated with the Most Wanted List (MWL). These canned searches show dynamic data reflecting current information in the database each time you open them​.

CAROL includes both investigative and recommendation data.  When using these search options, you first choose whether to view the results as a list of investigations or recommendations. Remember, the recommendations view provides a complete data set, if you only search Safety Recommendation Fields. The investigations view only displays the investigative records that have been created in the system. For aviation investigations, records from 1983 through the present are available. For investigations in other modes, data from 2010 through the present is available​​.

The CAROL query works with all modern browsers.​

See the CAROL Guide​ for more information on using CAROL and the database fields.