ASN Aircraft accident Cessna 550 Citation Bravo N4AT Winnipeg-James Armstrong Richardson International Airport, MB (YWG)
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Status:Accident investigation report completed and information captured
Date:Sunday 15 April 2018
Type:Silhouette image of generic C550 model; specific model in this crash may look slightly different
Cessna 550 Citation Bravo
Operator:David K. Gifford
Registration: N4AT
MSN: 550-0805
First flight: 1997
Engines: 2 Pratt & Whitney Canada PW530A
Crew:Fatalities: 0 / Occupants: 1
Passengers:Fatalities: 0 / Occupants: 1
Total:Fatalities: 0 / Occupants: 2
Aircraft damage: Substantial
Aircraft fate: Repaired
Location:Winnipeg-James Armstrong Richardson International Airport, MB (YWG) (   Canada)
Phase: Taxi (TXI)
Departure airport:Winnipeg-James Armstrong Richardson International Airport, MB (YWG/CYWG), Canada
Destination airport:Bedford-Hanscom Field, MA (BED/KBED), United States of America
A privately registered Cessna 550 Citation Bravo aircraft, N4AT, was conducting a flight from Winnipeg International Airport, Canada to Bedford, Massachusetts, USA. After starting the engines on Apron II while under the guidance of a ground marshaller, N4AT began to taxi for the departure. During the initial turn from the parking area, aircraft control was lost and N4AT's right wing collided with the nose gear of C-FXWT, a Bombardier CL-600-2B16 Challenger 605 aircraft, which was parked.
The pilot of N4AT subsequently shutdown the aircraft and exited with the passenger without injuries. The right wing of N4AT was substantially damaged, causing a fuel leak on the apron. The left wing of C-FXWT was also damaged in the collision by the nose of N4AT.

Probable Cause:

The TSB's on-site examination of the aircraft and subsequent laboratory testing of the hydraulic motor and pump assembly of the hydraulic brake system revealed that it would not operate. On-site examination also revealed that the LO BRK PRESS annunciator light would not illuminate when the brake pressure was below 750 psi because the switch was in a constant open state due to corrosion caused by hydraulic fluid contamination.

Accident investigation:

Investigating agency: TSB Canada
Status: Investigation completed
Duration: 198 days (7 months)
Accident number: A18C0018
Download report: Final report

Ground collision
Damaged on the ground

» TSB A18C0018


photo of Cessna-550-Citation-Bravo-N4AT
accident date: 15-04-2018
type: Cessna 550 Citation Bravo
registration: N4AT

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 Winnipeg-James Armstrong Richardson International Airport, MB to Bedford-Hanscom Field, MA as the crow flies is 2132 km (1333 miles).
Accident location: Exact; deduced from official accident report.

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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