The Boeing 787 took off from Delhi's Indira Gandhi International Airport at 1.35 pm and cabin decompression was detected when it attained the altitude of 20,000 feet, officials said.
The pilot of the AI-121 turned back from Rajasthan air space and landed safely at Delhi airport at around 4 pm, they said.
The aircraft was grounded and another plane is being scheduled tomorrow to fly the passengers to Frankfurt, the officials said.
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