| Answer | Crossword Clue |
|---|---|
| NTSB | Pipeline accident investigator: Abbr. |
| NTSB | Accident investigator (abbr.) |
| NTSB | Airline accident investigator (Abbr.) |
| NTSB | US accident investigator |
| NTSB | Fed. accident investigator |
| NTSB | Airplane accident investigator, initially |
| NTSB | U.S. accident investigator |
| NTSB | Accident investigator, for short |
