"Those guys are at the front of the aircraft. Of course sometimes they feel they're under pressure, that's their job - they've got 130 - '40 people at the back of the aircraft.
"But ... to say there's peer pressure, I can't quite accept that. These guys fly these aircraft safely."
He said he was also "very concerned" about the judge's criticisms of expert witnesses who gave evidence at Gunn's trial.
"Making these assumptions about other people's professional abilities, this really concerns me. They were expert witnesses."
During Gunn's trial last year, the prosecution claimed that had there been an engine failure during or immediately after take-off, the plane would not have been able to get safely out of the mountain-surrounded Queenstown basin.
A transcript of an interview with Gunn after the incident showed he regarded flying that day as "just another day in the office".
Judge Phillips found that to be an aggravating comment.
"You seemed to ignore the fact that you had to maintain visibility not only with the lake and the ground below, but also the mountainous terrain you had to fly around.
"Somehow, you as pilot-in-command could make your own rules."
Air traffic controllers who watched the plane take off made comments that included: "F***ing hell, I haven't seen this before", "Oh he's screwed" and "How big are his gonads?"
- Otago Daily Times and APNZ