His wife Margaret Viles was killed along with six other employees of Crop and Food Research in a plane crash in Christchurch in 2003.
The crash was one of the worst aviation disasters on New Zealand soil.
The Piper Navajo Chieftain plane was trying to land at Christchurch Airport in thick fog but descended too early and collided with trees before ploughing into the ground short of the runway.
Desma Hogg, 42, Margaret Viles, 53, Alistair Clough, 37, Richard Finch, 41, Katherine Carman, 35, Andrew Rosanowski, 37, and Howard Bezar, 55 were killed on impact, according to their autopsies.
Two passengers, Richard Barton and Tim Lindley, survived.
The Transport Accident Investigation Commission report said the accident was probably caused by the pilot Michael Bannerman becoming distracted.
He was flying too fast and erratically as he began his approach and failed to monitor the plane's altitude, the report said.