A mechanic reported a slide bottle on an A321 aircraft discharged as he was attempting to install a slide bottle safety pin at cabin door 3-Left (3L). A whoosh sound was heard and the slide deployed in the hangar.

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Attributes
ACN	925870
Time
Date	201012
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Escape Slide
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

While installing safety pin in door 3-Left (3l) slide bottle; was required to move the discharge lever to get pin installed. A 'whoosh' sound was heard. Bottle discharged; chute deployed. Bottle was not rigged correctly. Maintenance manual does inform you that performing this procedure may cause inadvertent slide deployment. Suggest rigging the bottles correctly.

Original NASA ASRS Text

Title: A Mechanic reported a slide bottle on an A321 aircraft discharged as he was attempting to install a slide bottle safety pin at cabin Door 3-Left (3L). A whoosh sound was heard and the slide deployed in the hangar.

Narrative: While installing Safety pin in Door 3-Left (3l) slide bottle; was required to move the discharge lever to get pin installed. A 'whoosh' sound was heard. Bottle discharged; chute deployed. Bottle was not rigged correctly. Maintenance Manual does inform you that performing this procedure may cause inadvertent slide deployment. Suggest rigging the bottles correctly.

Data retrieved from NASA's ASRS site as of April 2012 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.