Narrative:

A contract mechanic deployed the L2 slide. When we got to the airplane; mechanics where on board working on an open write up. However; the captain noticed the mechanic was working on and signed off work performed on the R1 door; even though the write up was for 'R2 door lock indication stuck on unlock.'once this was brought to his attention he refocused his work to the doors on the aft of the aircraft. While he was waiting for more guidance from maintenance control; the mechanic left the aircraft to attend to another issue on another airplane (throughout our interaction he appeared rushed and inattentive to detail and mentioned his workload several times).he eventually returned and went to the aft of the aircraft; and a short time later came to the flight deck to tell us he had inadvertently deployed a slide (L2). He specifically mentioned he was not sure how it happened as the door was disarmed; yet while describing what he did it sounded like he armed the door instead of disarming it. After the slide blew the mechanic left the plane and probably returned 20-25 minutes later and went back to the L2 door with the station manager. Shortly thereafter he came to the front of the plane and informed everyone that he had in fact armed the door and blew the slide.because of the prior confusion of which door needed attention; we had referenced the door page on the flight deck ECAM (electronic centralized aircraft monitor) several times and; in fact; had the page up at the time of the deployment and we can say no doors on the airplane were armed. It is also worth noting at no point had the inflight team been involved with any actions related to arming or disarming the doors. When we first arrived at the airplane they were asked to wait in the jet bridge while a security sweep was finished; then because of the initial maintenance issues they left to go grab coffee in the terminal. When they returned they sat in first class; which is where they were when the slide blew.

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Original NASA ASRS Text

Title: A320 Maintenance personnel; Flight Attendant and the Captain reported an inadvertent slide deployment while Maintenance worked on the cabin door.

Narrative: A Contract Mechanic deployed the L2 slide. When we got to the airplane; mechanics where on board working on an open write up. However; the Captain noticed the mechanic was working on and signed off work performed on the R1 door; even though the write up was for 'R2 door lock indication stuck on unlock.'Once this was brought to his attention he refocused his work to the doors on the aft of the aircraft. While he was waiting for more guidance from Maintenance Control; the mechanic left the aircraft to attend to another issue on another airplane (throughout our interaction he appeared rushed and inattentive to detail and mentioned his workload several times).He eventually returned and went to the aft of the aircraft; and a short time later came to the flight deck to tell us he had inadvertently deployed a slide (L2). He specifically mentioned he was not sure how it happened as the door was disarmed; yet while describing what he did it sounded like he ARMED the door instead of disarming it. After the slide blew the Mechanic left the plane and probably returned 20-25 minutes later and went back to the L2 door with the Station Manager. Shortly thereafter he came to the front of the plane and informed everyone that he had in fact armed the door and blew the slide.Because of the prior confusion of which door needed attention; we had referenced the DOOR page on the flight deck ECAM (Electronic Centralized Aircraft Monitor) several times and; in fact; had the page up at the time of the deployment and we can say no doors on the airplane were armed. It is also worth noting at no point had the inflight team been involved with any actions related to arming or disarming the doors. When we first arrived at the airplane they were asked to wait in the jet bridge while a security sweep was finished; then because of the initial maintenance issues they left to go grab coffee in the terminal. When they returned they sat in first class; which is where they were when the slide blew.

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.