An East Midlands Airport spokesperson said that the plane was diverted to East Midlands rather than continuing to Birmingham as when a "full emergency" is declared the plane must get to the nearest possible airport.
Six fire and rescue crews were on standby as the plane came into land.
The aircraft has now continued on its way to Birmingham Airport, its original destination.
More top news
Six Polish men were found at the two businesses, some living at sites, they are thought to have been paid around £1 an hour.
Tahir Mahmood was detained by Police as he was attempting to climb into the roof space of an out-building at his family’s home.
Family man Mr Javeed was the owner of Digbeth business Direct Source 3 and was shot and killed on February 3.