During approach to Laredo,Texas, yesterday, airplane ZA002 lost primary electrical power as a result of an onboard electrical fire. Backup systems, including the deployment of the Ram Air Turbine (RAT), functioned as expected and allowed the crew to complete a safe landing. The cause of the fire is still under investigation by Boeing.  The pilots executed a safe landing and at all times had positive control of the airplane and all of the information necessary to perform that safe landing. Initial inspection appears to indicate that a power control panel in the aft electronics bay will need to be replaced on ZA002. We are inspecting the power panel and surrounding area near that panel to determine if other repairs will be necessary.

We have retrieved flight data from the airplane and are analyzing it in
Seattle. This process will take several days. We are committed to finding the
cause quickly but will not rush the technical team in its efforts.

The team was conducting monitoring of the Nitrogen Generation System at the
time of the incident but there is no reason to suspect that the monitoring or
earlier testing of that system had anything to do with the incident.

Consistent with our internal processes, until we better understand the cause
of the incident on ZA002, we have decided to postpone flight test activities
on other airplanes. Ground test activities will be conducted until flight
test resumes.

Likewise, we cannot determine the impact of this event on the overall program
schedule until we have worked our way through the data. Teams have been
working through the night and will continue to work until analysis is
complete and a path forward is determined.


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