The person, who lives in Cheshire, travelled to Crete from Terminal 2 on July 12.
He had taken his youngsters by way of fast-track safety.
The household run their very own enterprise, so had been packing up bins at their workplace earlier than travelling away on the vacation.
This concerned utilizing a knife to chop tape on the bins, which he then took dwelling in his laptop computer bag to do extra at dwelling.
However the man, who doesn’t need to be named, utterly forgot it was within the bag.
He travelled with the bag to do work whereas on vacation and took the knife with it by way of safety unaware he was committing an unlawful act.
He has now made a grievance with the airport, fearful that this might have occurred to others too.
The airport has responded to this saying they’re following their protocols that occur when there’s an allegation of a safety breach.
The member of employees concerned in screening this man’s tray has been suspended from x-ray duties whereas the investigation takes place, the airport added.
The person mentioned: “I used to be going away with the household however we run our personal enterprise so we took a bag within the hand baggage with a laptop computer and another issues.
“We might been within the workplace some days earlier than flattening some bins utilizing a knife. I would put it in the identical bag to take it dwelling with me earlier than going away.
“The airport was completely rammed with large queues, however luckily we have been put by way of quick observe.
“Workers appeared very harassed due to the queues and there have been some points with some huge objects going by way of the scanners.
“I put the bag by way of safety and the whole lot was regular. However once we have been in Crete I bought the bag out to do some work and once I bought the charger I discovered the knife, I simply thought ‘bloody hell how has that bought by way of? How have I bought away with that?’
“It made me actually involved, what else is there that may very well be getting by way of? It is one thing that ought to have been taken very critically and even arrested.
“It isn’t like I used to be testing them or something, it was a whole mistake. I’ve emailed the airport about this because it should not be occurring.
“Everybody is aware of the airport has been a shambles not too long ago however this shouldn’t be occurring. It is harmful.
“I am very glad I discovered it once I did as that is the very last thing I might have wished attempting to return dwelling. It is the identical form of knife that was utilized by hijackers on 9/11, there is not any means this could have gotten by way of.”
A spokesperson for Manchester Airport mentioned: “We want to thank this individual for elevating his concern that he could have carried a prohibited merchandise by way of safety on July 12.
“Security and safety is our primary precedence and we’ll full a radical investigation into the circumstances of this incident.
“According to the processes we observe within the uncommon occasion allegations of this nature are acquired, now we have briefly eliminated the colleague concerned from x-ray screening duties.”