Date: 201901
Location: ZZZ.Airport, US
Aircraft: B737-800
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Parked
Reporter function: Flight Attendant (On Duty)
Reporter qualification: Flight Attendant Current
Human factors: Communication Breakdown; Situational Awareness; Training / Qualification
Anomaly: Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Passenger Misconduct
Detector: Person Flight Attendant
When detected: Pre-flight
Result: General None Reported / Taken
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: During general boarding; the D Flight Attendant was approached by a tall male passenger emitting the odor of marijuana; the passenger demanded that the Flight Attendant put up his luggage the bin at row 2. The passenger was informed to take a seat at mid to aft cabin due to distribution on the 800 aircraft; stating there is plenty of overhead bin space at the back for his carry on that seemed a bit large for the more narrow/less deep bins up front. The passenger snapped at the D Flight Attendant indicating that he was going to do what he wanted to do.Flight Attendant D recognized that the tall male passenger sat in the OWWE (Overwing Window Exit) Row. As the D made her way back she stopped to see how the passenger was doing. He was glossy eyed and loud. Flight Attendant D inquired if he had been smoking and under the influence of a substance. The passenger replied 'Yes; all day long.'  Flight Attendant D clarified if he were referring to Marijuana? The passenger replied 'Yes; I voted for it and I have been smoking all day long. We just signed a deal...' Then showing his logo/ clothing brand.The D Flight Attendant congratulated him on his business dealt then proceeded to inform the B Flight Attendant of the concern having a person under the influence of a substance in the OWWE. The B Flight Attendant concurred stating that 'Under the influence of a drug/marijuana is the same as alcohol.'The D Flight Attendant informed the A Flight Attendant of the concern then went up to the forward galley to discuss with the A [Flight Attendant]. The C Flight Attendant conducted the OWWE brief.The A [Flight Attendant] proceeded to talk to the passenger. The D Flight Attendant informed the flight deck both Captain and First Officer. No verbal response was given to the D Flight Attendant from the flight deck.The A Flight Attendant informed me; the D Flight Attendant that the man was okay.The D; said 'No he's not - he is admittedly in front of many passengers; I can smell the marijuana; under a controlled substance; approved use in Captain is only for use in the home and at a minimum he should not be in the OWWE; if even on this plane however even people who smell as if they've been drinking are not to be allowed to board.' The A Flight Attendant responded by saying; 'I spoke to him and leaned in and could not smell it.'Later the B Flight Attendant stated that he appears under the influence of marijuana/a substance and is eating a lot of pretzels; referring to the munchies.Later the C Flight Attendant stated that he (C) 'Heard how the passenger was talking to the D Flight Attendant and told him to settle down.' As the D Flight Attendant - the C heard that the passenger said he had been smoking marijuana all day long why was he allowed to remain in the overwing window exit?I think the FAM (Flight Attendant Manual) needs to clarify the term 'Intoxicated' to define if it only refers to alcohol or any substance to include marijuana; meth; speed; cocaine. Particular clarification is suggested with respect to marijuana as it is now legal in many states. However I don't think those laws supersede federal law or Federal Aviation Regulations. I think that the flight deck/ops made an error in allowing the passenger to remain in the OWWE; even if they wanted to approve a stoned/person under marijuana passenger to be able to remain on the plane. I think the fatal error was made in saying 'The A said the passenger was okay. 'If the A Flight Attendant has the final say then please clarify for crew.  The C and B Flight Attendants are still on probation and the A has not been flying too long. Being able to answer a question 'Yes; I will help' is not very reassuring when someone is under the influence of a primarily illegal substance even if it is legal in some states. It is a known fact that reaction time and mental processing of information is delayed under the influence of marijuana and other drugs; legal or illegal.




Synopsis: Flight Attendant reported that a person under the influence of marijuana was allowed to remain seated in the emergency aisle after admitting being under the influence.