Work Support Systems

  "Work support systems refers principally to a variety of structures used by technicians to gain access to different parts of the airplane. 

These structures include the maintenance hangar itself and proceed through scaffolds, ladders, stools, and "cherry pickers." 

The underlying purpose of all of these systems is to allow direct access to aircraft components and, hopefully, to make the work easier and safer. Some structures are sophisticated and allow on-the-spot adjustments in height and lateral position. Some major airlines use massive scaffolding systems that move and essentially enclose a large aircraft, thereby allowing direct and safe access to parts such as the vertical stabilizer. 

There are problems with existing work support systems. In some instances, a workstand will require a technician to work in an awkward position, thus tending to produce increased fatigue. The cherry pickers have the problem of inherent instability which becomes a safety concern and also increases the difficulty of detailed visual inspection. The application of torsional forces during maintenance also can be a problem when working from a platform of diminished stability.

The standards should address stability requirements, use of proper anti-skid work surfaces, the need for and recommended features of worker harnesses and restraints, and the inclusion of emergency warning and escape features. 

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