Well, in the modern day rules, a train with a defective
PA▸ shouldn't enter service. I always wondered how a
DOO▸ train driver was supposed to check it was working OK though!
Volume and clarity vary massively between types of train, and even trains of the same type. Newer trains often generally have better speakers and PA systems, and generally you stand a better chance of hearing when it's an electric train which has air-conditioning for obvious reasons.
GWR▸ ’s DOTE ( Defective on Train Equipment) states that the train can not enter service from a maintenance depot with a defective or isolated PA. It can enter service if it has been outstabled and it can remain in service if the PA becomes defective during the day. The Train Manager or Guard should patrol the defective coach and make announcements as necessary. If the train is DOO then it’s out of service unless the passengers can all be moved to a non defective coach or a work around using the GSMR is successful.
The PA will not be checked on overnight checks or on minor exams, so unless the defect is reported by train crew to Control or by passengers to train crew, who then report the fault to Control, it wouldn’t get picked up.
On major exams, the PA would be tested in every vehicle and from every handset point, something that generates a tone is played down the handset and the maintenance staff would walk through the set or unit checking the volume and clarity.
As somebody who spent 30 years digging into details of things that go wrong (albeit not within the railway industry), this statement poses as many questions as it answers.
Firstly, if the PA system is only fully checked on a major exam, it begs the question of how long between major exams? Presumably on this basis a PA system could partially fail (le. specifically a dodgy handset, or speaker(s) within individual coaches) on the first day back in service. It could then run like that until the next major exam, unless the defect is reported. And such defects aren't likely to be reported by the train crew's observation of a fault if, for example, a speaker isn't working properly in coach E of an 8 car
HST▸ and the train crew are nowhere near that coach when they're making announcements.
So that then begs the next question of who is going to report the defect? Other train crew/ railway staff travelling on the train? The general public? I would suggest that whilst some members of the public might report a crackle from a speaker rather than an announcement, I wouldn't have thought that many are likely to report a problem about a message that they haven't heard that they wouldn't necessarily be expecting anyway! (eg. my experience further up the thread with a
LC▸ failure near Abbotswood where the guard told me he made an announcement and I didn't hear it). I might just add about that incident that I just happened to see the guard on Lansdown station platform and I had the miseries anyway because I'd been standing from Brum. If I'd have had a seat on that journey I probably wouldn't have sought out the guard to remonstrate! In fact even then I didn't "seek him out" - he was standing just outside the vestibule I was standing in so he was a sitting target!
I suppose if I had sent a letter or email to
XC▸ 's Customer Service saying a variation on "your guard didn't make announcement about out-of-course delays" then this may eventually have led to his Supervisor having a word. Then, after the resultant "No You didn't! Yes I did!" style conversation, the fact may eventually dawn that there was a problem with the PA on that unit and a defect report would go in. In the meantime of course, that Voyager unit would have cracked up a fair few miles, each time shunting around a coachload of passengers who would have been in blissful ignorance that everybody else on the train was being kept informed, but they weren't!
This is the point that I would normally say in one of my reports "So here are my recommendations to resolve the problem." I'm afraid I am a bit short of solutions here other than to increase the frequency of checks on PA systems to include them on at least minor exams, and preferably daily.