I'm sure the NTSB report will cover why this didn't stop the accident. Presumably either the system wasn't working as-expected, or the fire truck proceeded despite the warning lights since they had clearance from the controller.
The system is only advisory at present, so if the truck did see a warning light and proceeded anyway, they were technically permitted to do so.
I'm sure the NTSB report will cover why this didn't stop the accident. Presumably either the system wasn't working as-expected, or the fire truck proceeded despite the warning lights since they had clearance from the controller.
The system is only advisory at present, so if the truck did see a warning light and proceeded anyway, they were technically permitted to do so.