BREAKING United #UA914 is declaring an emergency and holding 17,000ft. live:

UPDATE #UA914 diverted due to seat 1A entertainment system overheating, no fire.

UPDATE Reports suggest that #UA914 diverted to LHR following issue with air conditioning vents.

UPDATE #UA914 has 209 customers and a crew of 10 on board, diverted to LHR due to a maintenance issue.

UPDATE EMERGENCY We have confirmation United #UA914 safely landed at London Heathrow. Live: http://t.co/EIw0tWr1qt pic.twitter.com/WF9D8nVsMl

— AirLive.net (@airlivenet) July 1, 2015

UPDATE EMERGENCY United #UA914 will land at London Heathrow. Live: http://t.co/EIw0tWr1qt pic.twitter.com/T02ZtdgIZB

— AirLive.net (@airlivenet) July 1, 2015

BREAKING United flight #UA914 has declared an emergency and is diverting to the UK - @NewsHazbail

— AirLive.net (@airlivenet) July 1, 2015