Character mistake: To get on board a private yacht, Carl Swanson poses as a repairman from Mauna Loa Refrigeration Company but the name on the back of his uniform is misspelled "Muana Loa."
The Face of the Dragon - S1-E17
Character mistake: Near the end of the episode, McGarrett tells Dr. Kuh "The imposter Lewis Shen murdered your uncle." The uncle McGarrett is referring to was, earlier in the episode, referred to as Dr. Kuh's grandfather. (00:27:40 - 00:46:45)
Character mistake: While trying to figure out how to evacuate the other patients in order to get to Danny, McGarrett mentions a patient's daughter in room 309, but it's mentioned in other scenes that the man and his daughter are in room 306.
Answer: He was fired. He never really appreciated his character. He felt Kono was portrayed as a big dumb Hawaiian and that the stereotype was racist. He also felt underutilized. He was fired after a heated argument with the show's publicist regarding his character. It seems there's not much details given regarding the incident or the firing, so it's seems possible he upset the show's producers as well.
Bishop73
No he said something derogatory about one of the Jewish producers that's why he was fired.