Narrative:Flight 103 took off from Boston runway 33L at 14:08 in bad weather (800m visibility in snow, fog and moderate to severe icing in precipitation).
The cargo aircraft reached an altitude of 1700 feet after take-off and started to descend. The aircraft descended into a wooded area and crashed.
PROBABLE CAUSE: "Degraded aerodynamic performance beyond the flight capabilities of the aircraft resulting from an accumulation of ice and snow on the airframe before take-off and a further accumulation of ice when the aircraft was flown into moderate to severe icing conditions following take-off.
Contributing were encounters with windshear, downdraughts and turbulence during the climb. The failure of the flight crew to obtain an adequate pre-flight weather briefing and the failure of the National Weather Service to advise the crew of a SIGMET for severe icing conditions were also contributing factors."
» NTSB Safety Recommendations A-81-18
Official accident investigation report
Follow-up / safety actions
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 Shannon Airport as the crow flies is 4614 km (2884 miles).