turboshafts:
If there where no HUMS readouts, how can they conclude it is not a sufficient way of monitoring?
Prior to the accident flight the Airbus HUMS system was serviceable and being analysed IAW company and customer procedures, AH guidance and regulation.
AIBN are indicating that HUMS did not detect any anomalies, which is the reason for their statement "HUMS appears unable to identify symptoms of such degradation in the epicyclic module."
Where did you get the idea from that there were no HUMS readouts?