A321 captain reported a passenger tried to open a cabin door in flight.

Attributes
ACN	1239559
Time
Date	201502
Local Time Of Day	0601-1200
Place
Locale Reference	ZAB.ARTCC
State Reference	NM
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Security Flight Deck / Cabin / Aircraft Event Passenger Misconduct

Narrative:

In cruise flight at flight level 300; passenger attempted to open 4L door in flight.flight crew diffused situation by requesting passenger return to seat; and observed no further disruptive behavior. Took precaution by locking down cockpit door; crew and able bodied passenger watched passenger in question for any other suspicious behavior. Spoke to dispatch and agreed to continue to destination where ground security and law enforcement met the aircraft and took individual into custody.passenger may have had mental disability and no further disruption was detected after the flight crew explained the severity of his actions.

Original NASA ASRS Text

Title: A321 Captain reported a passenger tried to open a cabin door in flight.

Narrative: In cruise flight at flight level 300; PAX attempted to open 4L door in flight.Flight crew diffused situation by requesting PAX return to seat; and observed no further disruptive behavior. Took precaution by locking down cockpit door; crew and able bodied PAX watched PAX in question for any other suspicious behavior. Spoke to dispatch and agreed to continue to destination where ground security and law enforcement met the aircraft and took individual into custody.PAX may have had mental disability and no further disruption was detected after the flight crew explained the severity of his actions.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.