A door 4-Right slide on a B757-200 inadvertently deployed as mechanics were trouble shooting a 'door...

Attributes
ACN	983908
Time
Date	201112
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Exterior Pax/Crew Door
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

A logbook [flight] crew report [that] door 4-R (right) will not disarm led up to this event. While accomplishing check on 'arm/disarm' lever the slide deployed. The outcome of the event was that during inspection there were mechanical failures discovered in the 'arm/disarm' linkage and girt bar floor attach fittings that may have attributed to the inadvertent slide deployment.

Original NASA ASRS Text

Title: A door 4-Right slide on a B757-200 inadvertently deployed as mechanics were trouble shooting a 'door slide will not disarm' report. Inspection revealed mechanical failures in linkage and girt bar floor attach fittings.

Narrative: A logbook [flight] crew report [that] Door 4-R (Right) will not disarm led up to this event. While accomplishing check on 'Arm/Disarm' Lever the slide deployed. The outcome of the event was that during inspection there were mechanical failures discovered in the 'Arm/Disarm' linkage and girt bar floor attach fittings that may have attributed to the inadvertent slide deployment.

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.