During questioning in the inquest, Chris Ford, from the CAA, confirmed there had been a number of Aviation Related Concerns (ARCs) about Mr Hopping in earlier years.
Those concerns included an ARC on February 4, 2010, about a balloon flight that was cancelled because Mr Hopping appeared "too pissed and/or too high to perform piloting duties", the report said.
That incident was not isolated, the report said.
"In one incident within the previous two years, an on-board crew person had to take over the controls of the balloon because Mr Hopping was incapable of landing it on his own due to impairment."
Another related to an unauthorised notebook being found on the pilot as he was sitting a flying exam.
"A layman would call that cheating, wouldn't they?" Mr Sherriff asked Mr Ford, who agreed.
The exact test was not known, nor was the date it was taken, but Mr Sherriff told reporters it would have been before 2010.
The two CAA investigators tasked with looking into the ARCs decided the information they had was "insufficiently reliable" to justify an interview with Mr Hopping, the report said.
"This was because the information provided was of a hearsay nature, from persons who may have had their own agenda in making the assertions. [And] the police could not provide any relevant information."
A medical certificate in 2004 pointed to Mr Hopping's "binge drinking" and a note was made that he should drink more moderately.
CAA investigators decided to monitor his balloon operation on an ongoing basis, the report said.
Mr Sherriff suggested to Mr Ford the two investigators knew Mr Hopping, but Mr Ford did not know if that was so.
Mr Sherriff said if the information had been in the media in 2010, nobody would have been prepared to go on a balloon flight with Mr Hopping in charge.
"That's a fair assessment," Mr Ford replied.
He said the CAA was a "changed organisation" since 2010, with a new director, board and senior management team.
"Additional resources have been assigned, specifically related to investigations or ARC concerns."
Mr Sherriff asked Mr Ford if the CAA had let the public down in the way it dealt with the ARCs.
"There is no information available to me to say that was the case," Mr Ford said.
He agreed that in the 15 years Mr Hopping was a pilot, there was no CAA safety review into him.
The Transport Accident Investigation Commission had already established Mr Hopping's errors were ultimately responsible for the crash.
At the time, he had cannabis in his system.
His pilot's medical certificate had also lapsed.
The inquest continues.
