In a Facebook post, a fellow passenger said a mother and her two daughters were boarding the flight with their dog in tow when a flight attendant "insisted" that the dog be placed in the overhead bin.
Another passenger says a flight attendant had instructed the pet's owner to store the carrier that held the dog in the overhead compartment.
A dog was found dead after being stuffed in a travel bag and stored in an overhead bin during a United Airlines flight. "I assumed there must be ventilation as surely the flight attendant wouldn't have instructed this otherwise I heard the dog barking a little and we didn't realize it was barking a cry for help".
Gremminger said she is haunted by the sound of the black French bulldog barking during the flight, and then falling silent.
At least one flight attendant seemed unaware that a live animal was in the carrier, People reported. However, the flight attendants of flight UA1284 felt that the innocent animal was better off crammed inside the overhead container without air and water. "They assured the safety of the family's pet so wearily, the mother agreed". "There was no movement as his family called his name". "They lost their dog because of an @united flight attendant".
A pet traveling in cabin must be carried in an approved hard-sided or soft-sided kennel.
The carrier has apologised for the tragic loss, saying "We assume full responsibility for this tragedy and express our deepest condolences to the family and are committed to supporting them".
"We are thoroughly investigating what occurred to prevent this from ever happening again", added Schmerin.