A new piece of paperwork out of CASA that has the potential to cause some headaches: AWB 51-008.
(Extracts)
Effectivity
All aircraft that utilise tubular steel structure that is or forms part of the primary (or secondary) structure of the aircraft
Aircraft operators should ensure that the maintenance program for an aircraft constructed from welded tubular steel structure includes a requirement to periodically inspect all external and internal surfaces of the tubular structure. Any approved maintenance program which does not include a periodic inspection that will detect corrosion in the structure may be considered inadequate
(Emphasis mine)
If an appropriate inspection technique or NDT procedure is not available in the existing approved data for the applicable aircraft, such data may need to be developed by an NDT specialist in conjunction with a CASR 21M Delegate.
I wonder whether an engine mount is a primary or secondary structure? I would have thought so. Do aircraft have inspection techniques or NDT procedures in existing approved data that will detect corrosion on the internal surfaces of the engine mount?
Not to mention the effect on the presumably intended targets, where the fuselage etc. is welded steel tube.
How much weight does a "recommendation" in a AWB carry?