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NTSB update on TVC overrun

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NTSB ADVISORY
************************************************** **********
National Transportation Safety Board
Washington, DC 20594
April 24, 2007
************************************************** **********
UPDATE ON NTSB INVESTIGATION INTO RUNWAY OVERRUN IN TRAVERSE CITY, MICHIGAN

************************************************** **********
The National Transportation Safety Board today
released the following update on its investigation into the
runway overrun of a Bombardier CRJ-200 regional jet on April
12, 2007, about 12:43 am EDT, in Traverse City, Michigan.
Flight 4712, operated by Pinnacle Airlines, overran the
runway while landing at Cherry Capital Airport, Traverse
City. There were no injuries among the 49 passengers
(including 3 lap-held infants) and 3 crewmembers, and the
aircraft received substantial damage.
The flight was cleared for an instrument landing
system (ILS) approach to runway 28 by Minneapolis Air Route
Traffic Control Center. The Traverse City control tower was
closed at 10:00 pm per normal operations. Weather was
reported as snowing. Automatic weather observation data
indicated at 12:30 am, the visibility was one-half mile in
snow, with indefinite ceiling and vertical visibility of 200
feet. Snow removal operations were in progress at the
airport, and the flight crew communicated directly with
airport operations regarding the runway conditions.
After landing, the airplane overran the departure end
of runway 28, which is 6,501 feet long, with an additional
200 feet of pavement. Initial examination indicates that
the airplane exited the paved surface onto a grassy snow-
covered field, the nose gear separated from the fuselage,
and the airplane came to rest about 100 feet beyond the
pavement. The passengers and crew exited the airplane via
the main cabin door.
A go-team was launched from NTSB Headquarters under
the direction of Investigator-in-Charge Bill English and
specialists in Operations, Human Performance, and
Airworthiness.
Recorders Group
Flight data and cockpit voice recorders were recovered
from the airplane and read out at the NTSB laboratory in
Washington DC. Initial audition of the recorders indicates
both were in good condition and include the accident flight.
A cockpit voice recorder group was formed and will produce
a transcript of the recording.
Operations and Human Performance Group
The Operations and Human Performance Group interviewed
the flight crew on April 13. The captain, a company check
airman who was piloting the aircraft, had a total time of
about 5,600 hours, with 4,390 flight hours in the CRJ-200.

The first officer, who had been hired by Pinnacle in
January of 2007, had 2,500 total flight hours, with 15
flight hours in the CRJ-200.
Additional interviews of
airline personnel involved with the flight and the crew were
done on scene or scheduled for the near future. Airport
personnel working at the time of the accident, and airport
management personnel were also interviewed, and an Airport
Operations Group has been formed.
Further work remains in evaluating the recorder data,
weather information, airport field conditions and
communication, and performance of the airplane. An Aircraft
Performance Group will be formed, and specialists in
Meteorology and Air Traffic Control are also supporting the
investigation. Parties to the investigation include the
Federal Aviation Administration, Pinnacle Airlines, Airline
Pilots Association, General Electric Aircraft Engines, and
the Northwest Regional Airport Commission. The
Transportation Safety Board of Canada has provided an
Accredited Representative and technical advisors from
Bombardier Aerospace.
 

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