Accident Bombardier CRJ-100ER N995CA, Wednesday 21 July 2004
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Date:Wednesday 21 July 2004
Time:08:15 LT
Type:Silhouette image of generic CRJ1 model; specific model in this crash may look slightly different    
Bombardier CRJ-100ER
Owner/operator:Comair
Registration: N995CA
MSN: 7229
Total airframe hrs:15817 hours
Engine model:General Electric CF34-3A1
Fatalities:Fatalities: 0 / Occupants: 5
Other fatalities:0
Aircraft damage: None
Category:Accident
Location:Snow Hill, VA -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:Unknown
Departure airport:Charleston International Airport, SC (CHS/KCHS)
Destination airport:New York-John F. Kennedy International Airport, NY (JFK/KJFK)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The flight crew received a traffic advisory (TA) alert from the Traffic Alert and Collision Avoidance System (TCAS), followed shortly by an aural resolution advisory (RA) warning to "CLIMB, CLIMB." The first officer (FO) then disconnected the autopilot and initiated a climb, at a rate of ascent of 1,500 feet per minute. The captain then announced he was taking the controls and proceeded to pitch the airplane at a greater angle. As the airplane ascended, the flight attendant fell to the floor and broke her ankle. Once the TCAS announced, "clear of conflict," the captain leveled the airplane at 30,000 feet. He then returned the controls to the FO, and the airplane was descended back to an assigned altitude of FL 290. A review of radar data and air traffic control information, revealed that the accident airplane was climbing at a rate of 2,500 feet per minute and an airspeed of 483 knots. The airplane which caused the traffic alert for the accident airplane was an MD-80, which was climbing at 2,000 feet per minute, and an airspeed of 433 knots. The closest proximity between the two aircraft was 1.54 nautical miles, and 1,500 feet. According to the operator's Flight Standards Manual, "the correct response to a corrective RA is to fly from the red zone into the green zone. This maneuver requires a response within 5 seconds of the advisory using approximately a 0.25g maneuver". A performance review of the radar data revealed the flight crew's maneuver in response to the TCAS alert included a 1,000-foot climb, followed immediately by a descent back to the airplane's assigned altitude. The maneuver described by the radar data could be performed using an initial 1.15 G pull-up to start the climb, followed by a 0.05 push-over to arrest the climb and start the descent, followed by a 1.4 G pull-up to level the airplane at the assigned altitude. In this sequence, the time between the 0.05 G push-over and the 1.4 G level-off was about 5 seconds.

Probable Cause: The pilot's excessive maneuvering in response to a TCAS alert, which resulted in a serious injury to the flight attendant.

Accident investigation:
cover
  
Investigating agency: NTSB
Report number: NYC04LA174
Status: Investigation completed
Duration: 1 year and 8 months
Download report: Final report

Sources:

NTSB NYC04LA174

Location

Revision history:

Date/timeContributorUpdates
25-Mar-2024 09:48 ASN Update Bot Added

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