Table 4-1.Witness Information Chart
Sometimes developing a chart of your witness
and your best guess.
Some investigators write the
information (table 4-1) is helpful.
Determining the Sequence of Events
Now that you have your sketches, evidence,
photographs, video tapes, and witness statements, you
can determine your sequence of events. That is the most
difficult part of investigating a mishap, especially a
complex mishap. You must take all the events
surrounding the mishap and put the jigsaw puzzle
In some mishaps you have logs and records that aid
you in pinning down times and people. Start with the
times you do have; then fill in the blanks with testimony
sequence of events on small pieces of paper and arrange
them into different sequences until a possible chain of
Your chain of events can start days or weeks before
the mishap even occurred. Look as far back as needed
to find a cause that could prevent recurrence.
Maintenance done on an aircraft 6 weeks ago could be
a contributing cause to an aircraft crash. Disconnecting
a backup warning bell on a forklift last year may have
contributed to a workers being run over last week. All
of these may be part of your sequence of events.
Your sequence of events may also be extremely
short. A welding spark touching off a pyrotechnic
device that detonates other ammunition that blows out