An investigation was launched last night after a British Airways flight overshot the runway on a flight to Germany.
Flight BA1754 from Birmingham to Hanover came to rest 150 metres past the German landing strip this afternoon, according to the airport.
It was not known whether a heavy downpour possibly caused the mishap, which occurred at 5.05pm local time.
BA said the 45 passengers and four crew members were not injured and were able to walk off the small Embraer 145 jet.
The flight was operated by BA City Express Ltd, a Manchester-based wholly-owned subsidiary of BA.
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A spokeswoman said: "The information I have been given is that they were disembarked normally. They were generally OK in terms of the mood, although I am sure some of them would have been shocked.
"We have given customers the choice of hotel accommodation if they need it or want it and we are also offering to fly them back to Birmingham if they want to do that."
The plane's landing gear sank into the wet soil and the plane was being left in place .
BA is now back to 95 per cent of its scheduled service at Heathrow as the airport recovered from a catering row that spoiled thousands of holidays.