Just thinking out loud here, but this quote from the then BASI, morphed into ATSB had real relevance in 1993.
The investigation found that the circumstances of the accident were consistent with controlled flight into terrain. Descent below the minimum circling altitude without adequate visual reference was the culminating factor in a combination of local contributing factors and organisational failures. The local contributing factors included poor weather conditions, equipment deficiencies, inadequate procedures, inaccurate visual perception, and possible skill fatigue. Organisational failures were identified relating to the management of the airline by the company, and the regulation and licensing of its operations by the Civil Aviation Authority.
The same quote would have applied equally well to Lockhart in 2004 and it's not too long a stretch to apply it to Pel Air. The thing is, (IMO) the change in the ATSB attitude, they fought like hell during Lockhart to make the same point and got stuck with Miller and MOU for their pains, the ANA was side stepped and CASA slowly but surely gained the upper hand. It does not seem to be too outlandish to suggest that by the time PA came up (or went down, as you like) the ATSB had just about given up the uneven battle, beaten down by money, power and ever increasing political clout of the CASA. Just a Sunday thought on a lazy Monday, to idle to dig out the research, but the dots seem to join up OK.
Back to the BBQ, RDO should not be spent banging away on Pprune, anyway the snags are on fire.