Conway added that the pilot - who has not been identified - is from Pennsylvania and was born in 1965, according to ABC News.
"This is a serious matter and we are assisting local law enforcement and the Federal Aviation Administration with the investigation," American Airlines said. "We will handle this matter appropriately as the safety and care of our customers and employees is our highest priority."
The bizarre incident and frustrating confusion that followed was captured by some passengers who had to put their spring break plans on hold.
Amanda Albrecht, a teenage passenger who snapped a photo of the handcuffed pilot - which she tweeted using the hashtag #qualityhire - told WXYZ that she had not heard back from the airline. "I honesty just couldn't believe - I was speechless - that something like that could happen and, again, that he could get that close to the aircraft," she said.
FAA rules state that "no person may operate or attempt to operate an aircraft" within eight hours of having consumed alcohol or "with a blood alcohol content of 0.04 per cent or greater".
The agency recommends that pilots wait 24 hours from the last use of alcohol before flying.
"A hangover effect ... may be just as dangerous as the intoxication itself," an FAA safety brochure states. "A pilot with [such] symptoms would certainly not be fit to safely operate an aircraft."