On a first leg of my transatlantic trip my LH flight to MUC was delayed for a day because of engine problems. That caused me to miss the second leg, which was booked with a different airline (charter). LH agreed to fly me to the final destination, but couldn’t do it on a day of my arrival in MUC. I flew out next night and arrived in the following morning. Overall, I was delayed for three days.
What do you think, should I call the airline and ask for some sort of compensation? If yes, what kind of compensation would be appropriate? I booked my flight trough United, who should I speak to: them or LH?
Thanks in advance.

You have to check the airline's contract of carriage for its specific rules, but contracts of carriage can be awfully difficult to find a copy of.

Generally, engine problems that delay passengers are classified as the airline's fault, so you should be due either: free hotel, transportation, and meal vouchers during your delay (unless you were in your home city when the delay occurred), or a refund, which you can't get now since you accepted their alternate plan for getting you to your destination.

If weather delayed you for three days, you're just unlucky and entitled to no compensation of any kind.

Doesn't seem very fair, but the airlines really aren't obligated to do much about delays. Maybe that's why delays are so frequent.

Still, considering the lost time and half of $600 tour, I hope to get some consideration.

I think LH lived up to its responsibility to get you to your destination even though you missed the separately booked flight due to the technical problem. Some carriers would not have gone that far since your contact for carriage with LH was only to get you to MUC in a timely and safe fashion. You don't mention if LH provided delay compensation for the initial flight. Did they provide meal vouchers and if necessary hotel rooms? Did they provide anything in MUC until they flew you out to your final [where was that?] destination.

I think covering some costs of the initial delay would be in order, but once you got to MUC anything else LH did was quite generous because they had no obligation to compensate you for another trip booked separately and not with LH. Maybe I am overly cautious about such things, but whenever I am travelling with such a connection to an unconnected next flight/trip, I always leave a day to cover such problems when the onward travel is non-cancellable.

So, no, LH -- or UA -- need not compensate you anything further.

This may help - you may be able to get upto 600$ as airlines already voluntary seem to abide by these regulations - just refer to them in your claim.

http://www.europarl.eu.int/meetdocs/...2/381784en.pdf