Helicopter pilot Peter Maloney saw a warning light and within seconds knew the aircraft was going down. "I did observe a turbine warning light then heard an audible warning and declared a mayday," Mr Maloney said yesterday soon after he was rescued from the Waitemata Harbour by the navy and Auckland Westpac Rescue Helicopter staff. He and crew member Nina Heatley had been taking the prototype carbon fibre helicopter along the East Coast Bays over the water when the aircraft suddenly lost power.