As the NZCAA investigation stated
"__ Increasing flight crew knowledge and awareness regarding glideslope altimeter checks"
Quite simple really, and symptomatic of reliance on a normal indication..or situation..i.e. complacency.
Glideslope checks are not rocket science, they are merely part in parcel with good airmanship. As far as I can see no one has mentioned a personal check on glideslope, based on personal calculations that should match published figures..Jepps are not infallible.
More attention needs to be paid to this area.
