A gust of wind, pilot error or mechanical failure could have been to blame for carrying an ill-fated balloon into power lines yesterday, sparking a catastrophic fire and cutting power to 3800 homes.
An expert says long strings of power lines pose significant hazards for many forms of aviation.
Police yesterday confirmed that as a hot air balloon was preparing to land in a Carterton paddock, it was caught in wires on a power line, causing sparking in the basket.
One couple are believed to have jumped from the basket, just before the heat caused the balloon to leap upwards as it was engulfed in flames. It then plunged into a paddock. All 10 passengers and the pilot died.
Balloon Aviation Association president Martyn Stacey said pylons and power lines posed a danger for aviation pilots but there has been no official analysis of the extent of that danger or the frequency of aircraft tangling with the lines.