Sultan,
not really sure why the tech lesson was directed at me, i was only stating a fact as to what happens on the a/c i work on. i am type rated on L2 and other types, so am well aware of the chip detectors in the system.
L2 has Sump detector with "XMSN" caption on 10ww panel and Warnings
flared housing, manual detection on hourly based removal (19mm spanner)
epicyclic with HUMS detection,
IGB with HUMS detection,
TGB with HUMS detection,
Particle detector for TR input Bearing, checked on an hourly basis.
Also has an electrical chip detector and 5 mag plugs on each engine
as an engineering decision, checking plugs after every flight may not be mandated, but as i said, im happy to do that personally if it helps to ease the stress on those who have to fly on them.