Coroner: Why was that? RD: They had a certain shelf life, it was due for replacement Coroner: Do you recall when it was replaced RD: August 2015 Coroner: Was that ever adjusted RD: I believe they fitted it and they tested it Coroner: How did they test it?

Coroner: Why was that? RD: They had a certain shelf life, it was due for replacement Coroner: Do you recall when it was replaced RD: August 2015 Coroner: Was that ever adjusted RD: I believe they fitted it and they tested it Coroner: How did they test it?