scope:

Description of Driving Event:

The "Call Contractor" system utilized by the contractor MOD management has the least control of "how" a modification is performed. The "Call Contractor", utilizing "good construction practice", was given free reign in the method to accomplish the project. Drawings and instructions were incomplete. No formal briefings on associated hazards were held, allowing for unknown hazards to jeopardize the safety of the project and the workers. The working relationship between contractor MOD management, contractor DE, NASA DE, and the "Call Contractor" is not clearly defined and appears less than adequate.