| FAA ally |
| Crash-probe org. |
| RR wreck checker |
| Fed. crash prober |
| Crash-probing org. |
| Fed. wreck checker |
| Wreck-checking grp. |
| Wreck-checking org. |
| Fed. travel monitor |
| Govt. crash probers |
| Crash-probing agcy. |
| Wreck checker: Abbr. |
| Wreck-checking agcy. |
| Govt. travel watchdog |
| Amtrak overseer: abbr. |
| Accident-probing agcy. |
| Fed. crash-probing org. |
| Fed. crash investigator |
| Crash investigation org. |
| Fed. crash-probing agcy. |
| Govt. investigative org. |
| US accident investigator |
| Govt. crash investigator |
| Crash-investigating org. |
| Crash investigator: Abbr. |
| Crash-investigating agcy. |
| Accident investigation gp. |
| Crash investigators: Abbr. |
| Federal investigative grp. |
| Gov. accident investigator |
| Black-box analyzers: Abbr. |
| Airline investigative org. |
| Fed. accident investigator |
| Accident-investigating org. |
| Govt. accident investigator |
| Accident investigation org. |
| Accident-investigating agcy. |
| Fed. crash site investigator |
| It investigates RR accidents |
| Accident investigation agcy. |
| Accident investigator (abbr.) |
| Derailment-investigating org. |
| Crash site investigator: Abbr. |
| Org. that investigates crashes |
| Org. that recovers black boxes |
| Agcy. that analyzes black boxes |
| Agcy. that investigates crashes |
| Gov't. train wreck investigators |
| Marine accident responder: Abbr. |
| Accident investigator, for short |
| Fed. pipeline-rupture investigator |
| It may delve into a derailment: Abbr. |
| Org. that monitors aircraft accidents |
| Pipeline accident investigator: Abbr. |
| Airline accident investigator (Abbr.) |
| Airport accident investigators (abbr.) |
| Govt. org. with a "Safety Compass" blog |
| Investigator of many accidents, for short |
| Airplane accident investigator, initially |
| Grp. called in when things go off the rails? |
| Federal org. with a "Safety Recommendations" Web page |