The incident resulted in FOM (Formula One Management) cameraman Paul Allen suffering two broken ribs and a broken collarbone after he was struck by the right-rear wheel as it bounced down the pit lane.
Following an investigation, and in submitting a written report to the FIA and the other 10 teams, Red Bull claim Webber's car was released early.
The findings state the initial application of the nut to the wheel resulted in it being cross-threaded by the right-rear gun man.
In attempting to remove the nut, the wheel gun slipped in his hands, resulting in him accidentally depressing the 'go' trigger to the man on the front jack, who in turn released Webber.
Without a nut attached to the wheel, it quickly spun off and bounded through the pit lane past several startled mechanics in other teams prior to striking Allen.
In order to prevent a similar incident in future, Red Bull are to now revise the design of the wheel gun so should it rotate in a mechanic's hands the 'go' signal cannot be sent.
Furthermore, should an issue arise, the front-jack man has been told to hold the car until it is clear all the wheels have been changed.