However, Pacific Blue had concerns about whether he had been honest with them during their investigation into the incident.
Six months later the man and four other crew went to his home and partied in a spa pool, drank alcohol, and some took a natural herbal pill called Red Alert, supplied by the pilot.
One of the crew members slept at the man's place overnight. She said that next morning she found the pilot slumped on a chair looking "munted".
However, others at the party disputed her evidence, saying he was in bed.
When the woman went to leave the property, she collapsed on the street, was hospitalised and the class C-controlled drug benzylpiperazine (BZP) was found in her system.
At the time BZP was legal in New Zealand, but is now illegal.
The pilot was on standby to fly the afternoon following the party and he told his employer he had stopped drinking eight hours before his shift was due to start.
He said he had "no doubt" that he would have been within the acceptable (blood alcohol) range, although he did accept that he had pushed the limits, the Employment Court said.
Judge Christina Inglis said Pacific Blue operated in a safety-conscious industry.
"Public safety is a core concern. It is self evident that the defendant must have the utmost trust and confidence in its pilots."