Gina Rinehart's Hancock Prospecting has appealed a city council decision to deny approval for a helipad at its West Perth headquarters. The company argues that helicopter noise is comparable to a boiling kettle, challenging the council's stance. The dispute has been escalated to a tribunal, with multiple sources reporting on the ongoing legal battle. The appeal comes as the city council opposes the helipad, citing concerns over sound levels. Hancock Prospecting maintains its position that the noise is low and within acceptable limits.