On August 13, 2003, a Bombardier CL600-2B19 (registration N451CA) was involved in an aviation accident near Raleigh Durham, NC. Investigators recorded the probable cause as: Failure of a Hartman electrical relay. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
A flight crew experienced smoke in the cockpit shortly after takeoff from Charleston International Airport, prompting a diversion to Raleigh-Durham International Airport, where the aircraft landed safely. Maintenance traced the smoke to a failed Hartman electrical relay on the left utility bus.
Incident Overview
Following takeoff from Charleston International Airport, the flight crew detected smoke in the cockpit. The crew decided to divert the flight to Raleigh-Durham International Airport, where the aircraft landed without incident.
Findings
Post-flight maintenance examination revealed heat damage concentrated around the left utility bus electrical relay. Laboratory analysis of the relay determined that all thermal damage, including melting, charring, and arcing, originated either internally or on an external terminal of the relay. The source of the smoke was identified as the failure of a Hartman electrical relay.
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