If I understand the information currently available, a person related by family to the owner of the company worked in a government aviation regulatory agency (the same one Celia worked for?) which means that this company had "pull" and could (and possibly had in the past) try to intimidate a lower level functionary with that connection if (as she noted before) she had previously raised questions and they did not (in her terms) take her objections seriously. She doesn't want to lose her job. Putting a human face on how one deals with corruption or undue influence in any nation (not just in Bolivia) is what I am trying to do here.
I am also unclear on the following point: did she have the authority to disapprove / reject the flight plan submitted? I don't understand clearly what her position is.