Originally Posted by
SQ319
Assuming it was JFK-FRA-SIN, JFK-FRA it was open throughout the flight, FRA-SIN, it was available for use, and then closed after that.
- There is a possibility that the toilet became faulty in the second leg of the flight, hence the crew locked it. It's quite common for the crew to lock the toilets if it became faulty.
- How did u know the crew were still using it?
- Did you ask the crew why the toilet was locked?
It looks like a simple problem which could have been easily solved by asking the crew...

Because I could see them using it and even heard the flush when I walked by.
Yes, I did ask an old male crew and he just told me to use the other available lavatories, twice lol Either he had really poor understanding in English or just tried to avoid answering my question.