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Reliability of equipment

lyledunn
I have just changed out a JSB emergency light that I installed in a pub over 30 years ago. Many others remain in place at the same pub and are still functioning satisfactorily. The replacement unit was from a reputable supplier but certainly didn’t have the robustness of the JSB unit.

Do you give any serious thought to regulation 341.1 indent (iii) and if so do you have a formal procedure in place?
Parents
  • 0
    What is the "intended life"?


    Warranty + 1 day?


    Greased for life bearings. Hm! The lifespan is as long as the grease lasts. But if the bearing has a grease nipple, it's life may be considerably longer. That is my experience of propshaft UJs in a TR2 (1950s) v TR6 (1970s).


    AFAIK, aircraft bits are lifespanned. (IIRC, that had something to do with the grounding of the last Vulcan - the lifespan was unknown.) If time is up, the part is replaced whether it appears to be unworn or not. The same may apply in, e.g., the nuclear industry.


    In terms of domestic installations, the answers must be "no" and "no".


    So I think that there must be a range of responses according to the situation.
Reply
  • 0
    What is the "intended life"?


    Warranty + 1 day?


    Greased for life bearings. Hm! The lifespan is as long as the grease lasts. But if the bearing has a grease nipple, it's life may be considerably longer. That is my experience of propshaft UJs in a TR2 (1950s) v TR6 (1970s).


    AFAIK, aircraft bits are lifespanned. (IIRC, that had something to do with the grounding of the last Vulcan - the lifespan was unknown.) If time is up, the part is replaced whether it appears to be unworn or not. The same may apply in, e.g., the nuclear industry.


    In terms of domestic installations, the answers must be "no" and "no".


    So I think that there must be a range of responses according to the situation.
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