The terryifying incident happened on July 22nd, when a pilot landing an Airbus A320 into London's Heathrow, spotted a drone flying close to the jet.
The event was so serious it was classed as a category A, meaning there was a high risk of collision.
With the popularity of these flying machines increasing, commercial pilots are now calling for action on drones.
The general secretary of BALPA, Jim McAuslan, told Sky News, it would be very easy for a near miss to become a disaster.
He said: "Unless we put in place the regulation now and have enforcement procedures that are practical in operating efficiently then we are going to see an accident."
"It doesn't take much of a stretch of the imagination to imagine a 3kg weight going at speed ingested into a jet engine or hitting a widescreen."
Drones have become one of this years most popular tech gifts, and it's easy to see why.
These smartphone-powered flying machines are fun to fly and incredibly powerful getting to heights of over 1,000 ft.
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Surprisingly NATS aren't suggesting that drones should face a ban, but instead are offering advice on safe flying.
NATS say "Owners should be aware that any Remotely Piloted Aircraft Systems (RPAS) weighing less than 20kg is actually classified in the UK Air Navigation Order (ANO) as a ‘Small Unmanned Aircraft’ and is subject to rules and regulations just like manned aircraft.
"The rules determine where drones can and can’t be flown, height and distance restrictions and importantly the responsibilities of the operator.
"Currently, for Small Unmanned Aircraft, air traffic control is reliant on the operator’s adherence to these rules to ensure safe distances between the manned and unmanned world of aviation.
"If you’re thinking of buying an RPAS, big or small, make sure you check out the guidance on the safe use of Small Unmanned Aircraft at www.caa.co.uk/uas."
So if you open a drone this Christmas the advice seems clear, enjoy it but be careful where you take it flying.
For help NATS has produced this quick-start guide to the rules of flying unmanned aircraft.
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