Doing some work on updating the Cirrus accident statistics
information, largely prompted by Carol Jensen's recent work
with updating CDM charts.
That gave rise to clarifying how we distinguish the kinds of
information about CAPS parachute pulls. I would appreciate your
thoughts on these distinctions:
- CAPS activation -- a pre-impact initiation of the CAPS
system, possibly intentionally by someone in the plane or by physical
forces, and not including post-impact activations
- CAPS deployment -- the familiar scene of a round parachute
with a Cirrus underneath
- CAPS save -- the survival of someone in the aircraft after a
CAPS deployment
Hence, for a CAPS save to occur, there must be a CAPS deployment and a
CAPS activation.
What gets messy is when bad things happen and people are injured or
die involving CAPS. Here are all of the situations where something
didn't go right with CAPS involved:
- Lexington,
KY -- not a CAPS activation, because of the witness
reports that the rocket fired off after impact after a survivable
emergency off-airport landing
- Norden,
CA -- a CAPS activation, although we cannot confirm if by
pilot action or physical forces due to the excessive airspeed descent,
but not a CAPS deployment because the parachute separated
from the airframe and not a CAPS save because the fatality
of the only person aboard
- Indianapolis,
IN -- a CAPS activation by the passenger and a CAPS
deployment, even though it was incomplete, and a CAPS save,
because three people survived even though the pilot was fatally injured
- Sydney,
Australia -- a CAPS activation because of the actions of the
pilot, but not a CAPS deployment because of a malfunction
of the pick-up collar, later addressed by an airworthiness directive,
and hence not a CAPS save.
- Deltona,
FL -- a CAPS activation and a CAPS deployment but not
a CAPS save because while the parachute opened the aircraft
impacted trees and terrain with sufficient force to kill both people
aboard
- Boulder, CO -- a CAPS activation, although likely from the
force of the midair collision and less likely from a deliberate act by
someone in the airplane, and a CAPS deployment because we saw the
aircraft descend under canopy but not a CAPS save because
both people perished
Now, there is another dimension to add to these distinctions -- was
the system operated within the design parameters? Not too fast and not
too low.
- Norden -- too fast
- Indianapolis -- too low
- Deltona -- too low
Where this is headed is to try and avoid the notion of failure to
save someone from injury or fatality. In my opinion, we are better
served by distinguishing what happened and what resulted.
Posted
18 Apr 2010 11:28
by
Rick Beach