A woman aboard an Air Canada flight says she was ‘having a bad dream’ after reportedly waking up in a dark, empty plane hours after it landed.

The airline says it is looking into how crew members could have disembarked from a plane without noticing a sleeping passenger who was left behind.

The review comes after an incident involving a woman who described waking up “all alone” on a “cold dark” aircraft after a flight to Toronto earlier this month.

“I think I’m having a bad dream bc like seriously how is this happening!!?!” Tiffani Adams recounted in a June 19 Facebook post sent by her friend, Deanna Noel-Dale.

The airline confirmed the incident took place but declined to comment on its disembarking procedures or how the passenger may have been overlooked.

“We are still reviewing this matter so we have no additional details to share, but we have followed up with the customer and remain in contact with her,” Air Canada said.

Adams wrote that after she woke up, she called Noel-Dale to try to explain what happened, but her phone died and she couldn’t charge it because power to the plane was off. She said she was “full on panicking” by the time she found the “walky-talky thingies in the cockpit”, which also didn’t work.

After no one saw the “SOS signals” she made by shining a flashlight out the window, she unbolted a cabin door. Facing a steep drop to the tarmac, she leaned out of the aircraft and called over a ground crew, who got her out.

An airport crew member driving a luggage truck spotted her after she opened one of the plane’s doors.

“I am literally dangling my legs out the plane … He is asking how the heck they left me on the plane … I’m wondering the same,” said Adams. “Anyway the guy had the ladder dock and I jumped to safety before he was even a foot from the door.”

The passenger wrote that Air Canada personnel asked if she was OK and whether she would like a limo and hotel, but she declined the offer. She said airline representatives apologised and said they would investigate.

“I haven’t got much sleep since the reoccurring night terrors and waking up anxious and afraid I’m alone locked up someplace dark,” she wrote.

Air Canada said in a Facebook response to the post that it was surprised to hear the story and “very concerned”, asking Adams to send a private message with her flight details.

“We’ll take a look into it,” the airline wrote.

-with AAP