<p>New Delhi: A Mumbai-bound IndiGo aircraft returned to the national capital on Friday morning, with the airline saying the plane came back as a precaution due to a 'momentary foul smell'.</p>.<p>The flight 6E 449 returned to the Indira Gandhi International Airport (IGIA) sometime after take-off. In a statement, IndiGo said that there was a 'momentary foul smell' and the pilot following standard operating procedures landed back in Delhi as a precaution.</p>.Low visibility: Show cause notices issued to Air India, SpiceJet, IndiGo.<p>Specific details could not be immediately ascertained.</p>.<p>"An alternate aircraft was arranged for the passengers. We deeply regret the inconvenience caused to all the passengers," the airline said.</p>
<p>New Delhi: A Mumbai-bound IndiGo aircraft returned to the national capital on Friday morning, with the airline saying the plane came back as a precaution due to a 'momentary foul smell'.</p>.<p>The flight 6E 449 returned to the Indira Gandhi International Airport (IGIA) sometime after take-off. In a statement, IndiGo said that there was a 'momentary foul smell' and the pilot following standard operating procedures landed back in Delhi as a precaution.</p>.Low visibility: Show cause notices issued to Air India, SpiceJet, IndiGo.<p>Specific details could not be immediately ascertained.</p>.<p>"An alternate aircraft was arranged for the passengers. We deeply regret the inconvenience caused to all the passengers," the airline said.</p>