The 100 hourly is required to be signed of "IAW the logbook statement".
Hi progressive.
Do you have a CAR reference for that assertion?
CAR 42ZE says:
42ZE Certification of completion of maintenance on aircraft in Australian territory
(1) A person who carries out maintenance on an Australian aircraft in Australian territory must ensure that completion of the maintenance is certified in accordance with:
(a) if the person has an approved system of certification of completion of maintenance—that system; or
(b) if paragraph (a) does not apply—the CASA system of certification of completion of maintenance.
The ‘CASA system of certification of completion of maintenance’ is in Schedule 6 of the CARs. The phrase ‘log book statement’ does not appear anywhere in Schedule 6.
Schedule 6 para 4.6 says: “A person must not make a final certification (under Schedule 6) unless the person is satisfied that … (a) all maintenance required to be carried out on the aircraft has been carried out…
Those requirements are driven by the schedule of maintenance and the approved maintenance data. I realise that the LAME will usually have only the ‘log book statement’ on which to rely to determine what the schedule of maintenance for the aircraft may be, but it’s still regulatory cart, not horse.
I have no doubt what the practice is. But, like many things in aviation in Australia, the practice may merely be a perpetuation of an OWT, including by CASA.