Preliminary Report release date changed again.
Ethiopia will not release a preliminary report into the causes of last month’s Ethiopian Airlines crash on Monday, as previously expected, but may publish it this week.
Ethiopia’s foreign ministry spokesman had earlier said the preliminary crash report would be released by the ministry of transport on Monday. It was not immediately clear why the plans had changed.https://www.reuters.com/article/us-ethi ... SKCN1RD1PB
I can understand why Ethiopia may need a bit more time to decide what to put in their Preliminary Report.
IMHO FDR & CVR are not the issues. They will clearly show that MCAS was active.
But rightfully so, and that may point to Ethiopian Airlines responsibility.
Are the maintenance records for that aircraft good enough to be released:
- serial numbers of the AoA sensors installed? (by the way, did they find them in the debris? They should have!)
- history records of the AoA sensors (source, repairs, ...)
- detailed records of the installation and test procedure of both sensors on that particular a/c
And if their maintenance records are not good enough, what will they do?
Notice that the Lion Air prelim was also vague in that area:
- no AoA serial numbers
- soon after they found the FDR and CVR, I think they basically stopped recovering more pieces, even though they are only 30m deep.
- "Installation test and heater system test result good." That is short! In another AMM, Being specifically says "Make a record of the left AOA sensor values" read with the ARINC 429 bus reader with the vane at 0, +90 and -90 degrees.
- "The investigation will perform several tests including the test of the AoA sensor and the aircraft simulator exercises in the Boeing engineering simulator." Which AoA sensor are they going to test? One that was recovered? Which one? Or one straight out of the factory?
It is easy to put all the blame on MCAS. But IMHO, the bigger problem may be in maintenance as I do not yet see a solution on the horizon.