Lenny, the site has THOUSANDS of leads with faults like those!
I would take it higher up the chain if I were you, bypassing this "engineer".
I'm not sure if you're an employee, or a subby, but if you're an employee, be aware of duties placed onto you by the Management of Health and Safety at Work Act 1999 -
(2) Every employee shall inform his employer or any other employee of that employer with specific responsibility for the health and safety of his fellow employees -
(a) of any work situation which a person with the first-mentioned employee's training and instruction would reasonably consider represented a serious and immediate danger to health and safety
Just some food for thought and statutory regulations are pretty good when persuading. I would class this defect as a serious and immediate danger to health and safety.