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Accident description
Last updated: 18 October 2017
Status:Final
Date:Thursday 14 July 2011
Time:19:33
Type:Silhouette image of generic CRJ9 model; specific model in this crash may look slightly different
Canadair CL-600-2D24 Regional Jet CRJ-900ER
Operated by:Atlantic Southeast Airlines - ASA
On behalf of:Delta Connection
Registration: N132EV
C/n / msn: 15219
First flight: 2009
Total airframe hrs:6150
Engines: 2 General Electric CF34-8C5
Crew:Fatalities: 0 / Occupants: 3
Passengers:Fatalities: 0 / Occupants: 74
Total:Fatalities: 0 / Occupants: 77
Airplane damage: Substantial
Airplane fate: Repaired
Location:Boston-Logan International Airport, MA (BOS) (   United States of America)
Phase: Taxi (TXI)
Nature:Domestic Scheduled Passenger
Departure airport:Boston-Logan International Airport, MA (BOS/KBOS), United States of America
Destination airport:Raleigh/Durham International Airport, NC (RDU/KRDU), United States of America
Flightnumber:4904
Narrative:
A Delta Air Lines Boeing 767-300ER, N185DN, operating as Delta flight 266, was taxiing on taxiway B for departure on runway 04 at Boston Logan International Airport (BOS), when its left winglet struck the horizontal stabilizer of an Atlantic Southeast Airlines CRJ900, N132EV, operating as ASA flight 4904, which was number three in line on taxiway M waiting for departure on runway 09.
As the Boeing 767 approached and passed the intersection with taxiway M, the left winglet of the B767 struck the horizontal tail of the CRJ900. The CRJ900 sustained substantial damage, which included damage to the horizontal tail and vertical tail; the airplane lost fluid in all three hydraulic systems. Parts of the B767 winglet were sheared off and embedded in the tail of the CRJ900. The passengers on the CRJ900 were deplaned on the taxiway, and the B767 taxied back to the terminal.

Probable Cause:

PROBABLE CAUSE: "The B767 Captain's failure to maintain a safe clearance between his wing and the tail of the CRJ900 that was stopped on a taxiway."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 4 years and 9 months
Accident number: DCA11CA084A
Download report: Summary report

Classification:
Ground collision

Sources:
» NTSB


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Boston-Logan International Airport, MA to Raleigh/Durham International Airport, NC as the crow flies is 978 km (611 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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