AFPAM91-206 governs participation in military or civil aircraft and space safety investigations and related information release.
View AFPAM91-206 on armypubs.army.mil
It describes processes implementing Title 49 U.S.C. Section 1132, DODI 6055.07, and NASA Procedural Requirements 8621.1B. It covers NTSB accident, NASA space mishap, military mishap safety, and military legal or administrative investigations, and compliance with the publication is mandatory.
A safety investigation recommends corrective actions to reduce or eliminate hazards.
An NTSB aircraft investigation has priority over any other investigation by another federal agency or department. (paragraph 1)
Concurrent investigations are not joint with the NTSB and may not interfere with NTSB activities. (paragraph 1)
An administrative investigation may conclude culpability and may recommend punitive action.
In an NTSB investigation a witness can be subpoenaed to appear before the NTSB to provide a statement or testimony, but the witness cannot be compelled to incriminate themselves. (paragraph 1)