They are talking about an aural waring, that indicated to the crew, they went below the decision heigth. E. Klich doesn't want to be very specific, but it looks like he's talking about the aural warning from the RV-5M radioaltimeter, generated when past the decision height set on it.
Nothing to do, with what you were suggesting.
I don't know, what should be the setting of DH on RA in a Tu-154M during approach/landing, but it was probably their last chance to pull-up.
Arrakis