Ah yes. I hope you get someone thorough. I do wonder if the UG lead in is borked also, if the first pair was bum, the second might not be that good either.
Ask him what the estimated top sync is on his task notes.
Ask him what the actual reported fault is on Brandenburg, 'bridge tap' at a guess.
Be nosey when he runs his pair quality tests on his JDSU or Exfo, make sure you see the results, all good 'green ticks' no exclamation marks, or worse still red crosses.
With the tester in manual sync mode, you can see all the line stats, make a note of them, you can also see a theoretical max sync rate too. If he sorts this out, there should be an increase in this figure, and the downstream SNR. If all sorted, then he should initiate a DLM reset via his mobile, and that should be that. You will have to get PN to change their setting too, so through put speeds are raised straight off.
Good luck.