Xeque:
Bit of reality needed here.
The aircraft was 6 months old so no major maintenance issues.
I live in Thailand where we are experiencing the aftermath of a major weather system the same system being a contributing factor to this accident in Laos. At times here (and we are several hundred miles from the crash site) the rain has been so heavy that road traffic has been slowed to a crawl because you simply cannot see any distance in front of you.
There is only one question to ask. Was it prudent to continue the approach in such severe weather conditions?
Do you have a copy of the METAR in effect at the time of the accident?
If the rain was as heavy as you allege they probably wouldn't have had the required visual references at MDA or DA.