Narrative:

Called out to aircraft X for an R2 door intermittent arm/disarm indication. Door had a previous write up. Met the lead mechanic and supervisor on the jetway where a verbal monitor/challenge briefing was given. Due to the nature of the problem and history; it was agreed that a brief visual check of the arming handle mechanism and wiring would be performed and if no obvious defects noted; maintenance would be consulted about an MEL. Upon successful disarming of the door (confirmed by both the lead and supervisor) the door was opened without incident. During the visual check the door was in the half open position. Contact was made with the release lever on the door jam and the slide deployed. Release lever actuation is not possible with the door in the full open and locked position. This door was partially opened to gain sufficient access to do the visual check for obvious defects. It is well known regardless of department affiliation that inadvertent slide deployments are a high target/priority item to the company. I would suggest more frequent web based training of every 3 to 4 months as opposed to once a year. I would also suggest additional markings/placards be installed and be visible from more than one angle. The placard installed in the door jam is not easily visible from the inside of the airplane from the position I was in at the time of the incident. Lastly; I would suggest that an MEL be applied to any and all door issues if applicable before accomplishing any type of troubleshooting on a thru flight aircraft.

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Original NASA ASRS Text

Title: Two maintenance technicians reported an inadvertent aircraft entry door slide deployment during maintenance troubleshooting activity.

Narrative: Called out to Aircraft X for an R2 door intermittent arm/disarm indication. Door had a previous write up. Met the Lead Mechanic and Supervisor on the jetway where a verbal Monitor/Challenge briefing was given. Due to the nature of the problem and history; it was agreed that a brief visual check of the arming handle mechanism and wiring would be performed and if NO obvious defects noted; Maintenance would be consulted about an MEL. Upon successful disarming of the door (confirmed by both the Lead and Supervisor) the door was opened without incident. During the visual check the door was in the half open position. Contact was made with the release lever on the door jam and the slide deployed. Release lever actuation is not possible with the door in the full open and locked position. This door was partially opened to gain sufficient access to do the visual check for obvious defects. It is well known regardless of department affiliation that Inadvertent Slide Deployments are a High target/priority item to the company. I would suggest more frequent Web Based Training of every 3 to 4 months as opposed to once a year. I would also suggest additional markings/placards be installed and be visible from more than one angle. The placard installed in the door jam is NOT easily visible from the inside of the airplane from the position I was in at the time of the incident. Lastly; I would suggest that an MEL be applied to any and all door issues if applicable before accomplishing any type of troubleshooting on a thru flight aircraft.

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.