What key aspect should technicians focus on when repairing radar-absorbing materials?

When technicians are repairing radar-absorbing materials, maintaining radar transparency is the key aspect to focus on. This is crucial because the primary function of radar-absorbing materials is to reduce the radar cross-section (RCS) of an aircraft, enhancing its stealth capabilities. If repairs compromise the material's effectiveness in absorbing radar waves, it can lead to increased detectability, undermining the aircraft's design purpose.

The integrity of the radar-absorbing properties must be preserved to ensure the aircraft remains low observable. This means that any repair techniques, materials, or methods used should not introduce new materials or processes that could alter the radar absorption characteristics. Thus, maintaining radar transparency is paramount during any repair activities involving these specialized materials.