The first time I flown in A340, it was a flight between Munich and Los-Angeles. I crached in Nevada. I don’t have any tips for you but just check your flight a lot of time
Like other people here, I would recommend keeping a close eye on what the plane is doing.
I have a similar story as @Yukiros_31, except it was Mount Hood for me. I’ve tried flying the A340 a few different times. None of them have had happy endings.
Once you learn how to fly it, it is actually pretty straight forward. I recommend bringing PLENTY of extra fuel, this can not be stated enough, it guzzles it. I have also found that it is best to not perform sharp turns, be very gradual with your changes in pitch and banking. And finally if you want to have a realistic flair (despite the unrealistic physics), you need to be touching down around 130 knots, this is my butter zone I have found.