I saw this sign at Bangalore International Airport above a drinking water dispenser (also called a 'water fountain', are there any other synonyms you can think of ? ) that was not working. The spelling is wrong, it is correctly spelt as 'unserviceable'. I first thought that it was wrong usage too and that the word 'unserviceable' referred to something that is beyond repair, cannot be repaired. But on checking, I found that interestingly it has got two uses: one is the meaning above (beyond repair or something that can never be used), and another meaning that means that something that *currently* cannot be used (see for example at answers.com . The second meaning does fit the context in which the word was used.