Kobe and Gianna were among 9 people killed in the crash.
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The wrongful death claim was submitted Monday morning, the day of the public memorial service for Kobe and Gianna.
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In the 72-page claim, Bryant's attorney alleges Ara Zobayan "failed to properly monitor and assess the weather prior to takeoff."''
The lawsuit also alleges "he failed to obtain proper weather data" prior to the flight.
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The claim also names Zobayan's estate as a defendant.
In a statement, Island Express said:
"This was a tragic accident. We will have no comment on the pending litigation."
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