Samsara , as i told you in other post , " its better not to speak and let people think your a fool , rather than opening your mouth and proving it " .
Lemme correct you first by saying that Aviation is nepal is not handled by ministry but by CAAN . look  what it stands for .
Now when you say about aircrafts , the AC that come to nepal has to be not older than 20 yrs from manufacture date , And in aviation world thats fairly new .Pilots being better trained, its up to the company and the operation dept to take care of it , and i am pretty sure most of the companies in nepal and around the world do take care of it . Its their million dollar AC at stake too . Just common sense .
Pilots trained anywhere around the world , when come back to nepal , they have to sit for the exam .( and its not easy ) . Its better  and tougher  than FAA .( search FAA too while you at it ) .
As for mantainance personals , they too have to go through the certification and other stuff .. And its not easy either . May be whatever you are studying or doing is easy , but aviation field is not .There are regulations set up for every little thing , and you gotta follow it to the T . Now if you dont and you get caught , then its as good as surrendering your license .
Now since you have raised this whole issue because of the crash ,let me enlighten you on the aircraft too . Its a mi-17 helicopter , and its one of the most respected AC in the world . Best performance with the cheapest price . And its pretty close to be categerising as a HEAVY . Its flown around 110 countries , and has one of the safest  record only second to Bell .The US army is flying them in Iraq , Afghanistan etc . As for the weather and the crew, i cannot comment , cause i have no knowledge about them .

Now sir , little knowledge is dangerous as someone said . If you dont have the knowledge about the subject samsara ,i would request you not to open your mouth and prove that your a fool ...