Almost 400 cows aboard a Boeing 747 heated the craft up so much they set off the fire alarm. Pilots diverted from their location over the Irish sea, and made a safe landing at Heathrow.
This did not happen April 1st, so we are presuming it is an actual event.
None of the 390 cattle were injured. The carrier may wish to remain nameless as the name of airline involved was not released, perhaps fearing a reduction in cattle bookings. (Yes, this is sarcasm. Cows can’t read and their choice of carrier is not likely to hinge on written emergency reports.)
After landing, maintenance crews checked the plane’s fire alarm system and found no smoke or fire, concluding that cows were the culprits causing excessive heat. We assume none of the cows were smoking.