See new interim report here:
aair200806143.aspx
Key new points:
1. Testing discounts Leamonth VLF interference.
2. No fault found with ADIRUs so far; testing continues.
3. PRIMS usually filter spikes from ADIRUs, but fail to filter rare combinations of spikes. Only applies to A330/340.
4. ADIRU 1 generated many spikes. Two sets appear not to have been rejected by PRIMS and resulted in nose-down events. Subsequent events explained by as-designed fall back response.
4. Three other similar incidents (all having no ill effects) uncovered (4 total, all QANTAS or Jetstar)
5. Reproducible situation identified where loosely fastened seatbelts can disconnect if passenger propelled upward.
Curiouser and curiouser...