An Air Canada Bombardier C-Series CS-300, registration C-GWUQ performing flight AC-760 from San Francisco,CA (USA) to Montreal,QC (Canada), was cleared for takeoff from San Francisco's runway 01R and was accelerating for takeoff.

A few seconds later tower cleared a United Boieng 737-8 MAX, registration N17346 performing flight UA-1111 from San Francisco,CA to Lihue,HI (USA) to cross runway 01L and cross runway 01R. The Boeing crew stopped short of runway 01R seeing the departing traffic and queried the controller, who claimed he had only cleared to cross runway 01L.

Both aircraft continued to their destinations without further incident.

Metars:
KSFO 241656Z 28008KT 10SM FEW005 BKN012 OVC018 13/10 A3002 RMK AO2 SLP164 T01330100=
KSFO 241612Z 26009KT 10SM FEW005 BKN010 OVC017 13/10 A3001 RMK AO2 T01280100=
KSFO 241556Z 25009KT 10SM FEW005 BKN009 OVC013 13/10 A3001 RMK AO2 SLP160 T01280100=
KSFO 241456Z 25010KT 10SM FEW005 BKN009 OVC013 13/10 A2999 RMK AO2 SLP155 T01280100 53014=
KSFO 241356Z 25009KT 10SM FEW004 BKN009 OVC013 12/11 A2998 RMK AO2 SLP151 T01220106=
KSFO 241256Z 26011KT 10SM FEW004 OVC008 12/11 A2996 RMK AO2 SLP145 T01220106=
KSFO 241156Z 25006KT 10SM FEW004 OVC008 12/11 A2995 RMK AO2 SLP141 T01220106 10128 20122 53001=
KSFO 241056Z 28006KT 10SM FEW005 OVC009 13/11 A2995 RMK AO2 SLP140 T01280106=


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