There are several issues here. Job responsibility, skill
level and knowledge of the proposed project, liability, Insurance, to name a few.
Job responsibility. None of us here can comment on that, it depends on your contract with the school and the job description that accompanied the contract. The responsibilities vary greatly from place to place. If your job description lists
system maintenance and repair, then it is your job up to a
point. What that
point is, is a gray area that only the two parties can decide. If the job description only lists maintenance, then is is different, now the gray area is to define maintenance.
As to the skill and knowledge levels. I don't know your background, BA? BFA? MFA? no degree at all, 30 years as a rigger???? Probably not the latter or you would not be asking the question. If you have had
stage craft/rigging classes at the grad
level, you have the knowledge needed but, judging from your post, not the experience. If you are just an average TD you have more than enough skill
level, but again not the experience. The main thing experience (on-the-job training) gives you is learning the efficient ways to do a job, the correct order to do it in and things to watch out for from your workers. I feel confident you could replace a
lineset. Quickly? probably not. Efficiently? Again, probably not, especially the first one or two. Possible problems or things to look for are the biggest possible weak points. Things like proper crimps on an oval sleeve (right tool for right sleeve, # of crimps for the tool, proper torque for
wire rope clips, knowing to re-torque them after the first loading or first 30 days, what rigging hardware to use for a specific job,
etc.)
Liability. In 99.9% of educational institutions, if they require you to perform a job as part of your official duties, they are the liable party and they are responsible for insurance. If you work for a rigging company as an employee, same answer. If you work as a jobber (IA or not) or freelancer, THEN you are the liable party and must carry the insurance.
Now in your case in particular, is it obvious you are very uncomfortable with the idea of doing the rigging. If it is indeed part of your job description, I suggest you discuss this with the PTB and see if they would consider hiring a rigger to supervise your first one or two
line set up grades. In your area,
Limelight would be one place to check to see if they would help with that. Also Check with Mike Katz the Technical Director at MIT and see if he has any classes this fall that you could
monitor or possibility if he would be interested in working with you on a
lineset replacement (here liability issues might force him to say no to you even though he would do it on his own
stage).
HTH, if you have any more questions, ask!