Date: 201511
Local time of day: 0601-1200
Location: ZZZ.Airport, US
Light: Daylight
Aircraft: A319
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Passenger
Flight phase: Parked
Aircraft component: Escape Slide
Component problem: Improperly Operated
Reporter organization: Air Carrier
Reporter function: Captain
Reporter qualification: Flight Crew Air Transport Pilot (ATP)
Human factors: Other / Unknown
Second reporter function: Flight Attendant In Charge
Anomaly: Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Detector: Person Flight Attendant
When detected: Aircraft In Service At Gate
Result: General Flight Cancelled / Delayed; General Maintenance Action
Contributing factors: Human Factors
Primary problem: Human Factors

Narrative: After gate arrival FO (First Officer) and I noticed door R1 had not been disarmed. I called on the interphone and #1 did not pick up. I then sent the FO back. I then noticed on my ECAM (Electronic Centralized Aircraft Monitoring) that the door was disarmed. I called back and let them know door is showing disarmed and FO tells me to make sure area outside R1 door is clear. I do that and then went back to see what is happening. Apparently the #1 FA (Flight Attendant) instead of disarming the door opened the door. When the FO went back he saw the FA holding the door trying to prevent the door from opening any further. The door at this point was opened about 6 to 8 inches. FO grabbed the door from FA and he tried to close it. Door would not move and FO was struggling to keep door in the position that it was in. At this point the FA moves the disarming handle which gave me my ECAM indication of the door being disarmed. That is the point that I called back and said I had a disarmed indication on the ECAM. After clearing the R1 area I went back. I asked the FO if there was any chance to close the door and he said there was no way. I told him to release the door. The slide then deployed.


Second narrative: Upon gate arrival; as Flight Attendant #1 I gave the announcement 'flight attendants verify and disarm doors; standby for all-call'. I proceeded to do self-monitor and challenge disarming 1L because I saw the jet bridge agent moving towards the aircraft then walked over to 1R standing in front of the door left hand on arming lever right hand removing the red strap instead pulling up a little on door handle. A quarter up I realized the door was opening holding tight to keep it shut. The FO (First Officer) came out to check what was occurring he also tried to pull the door shut. The captain said to disarm so he did and visually seeing that it was he instructed the FO and I to let the door go. Slowly it proceeded outward and slide deployed. This event occurred with possibility of many distractions. I visually saw the arming lever and did monitor and challenge also on 1L. Between the loss of my family member we are saying goodbye to tomorrow on my mind; the quick turn so my crew members could get home to their families; the lack of sleep with an early sign in on a reserve day; the distraction of a passenger talking to me; under the weather with a severe migraine. Something we do just about every day with no doubt when we depart and arrive this time went wrong maybe also complacency and stress of everything going on all at once.


Synopsis: A Flight Attendant on an A319 inadvertently started to open door 1R before disarming the slide. The First Officer tried to assist; but they were unable to close the door and when it was released the slide deployed.