> Flight 610 should never have taken off.
A repaired aircraft should not take off?
The AoA attack sensor was replaced prior to flight LNI043 (he flight prior to 610), in which the pilots declared pan-pan and had to manually override the auto trim systems (which include MCAS). Between 043 and 610, there was further maintenance that included flushing the pilot valves and cleaning electrical connectors, but the AoA sensor was not replaced between 043 and 610.
An aircraft that was repaired followed by one flight in which the pilots declared abnormal operation and performed 3 non-normal checklists should probably not fly again until they figured out what happened, and the next flight should definitely be aware of the incident on the flight prior. 043 faced and overcame the exact same malfunction as 610 - to me that indicates a clear failure. If you keep flying an aircraft that malfunctions on each flight, you're pressing your luck.
They followed Boeing's procedure in attempting to address the issue again (after already replacing the sensor). That's a completely appropriate action.
> the next flight should definitely be aware of the incident on the flight prior.
It is in the log book. Is this a reference to something particular?
> 043 faced and overcame the exact same malfunction as 610 - to me that indicates a clear failure.
I agree, that's why maintenance conducted a repair.
> If you keep flying an aircraft that malfunctions on each flight, you're pressing your luck.
They attempted two repairs in accordance to the manufacturer's procedures within that time in order to resolve the malfunctions.
This post references the report and you clearly read it enough to know your original conclusion was mistaken, but are still arguing you're right by trying to shift the discussion. You've gone from "they flew a broken aircraft" to "alight, so they repaired it twice, but you cannot ever trust a malfunctioning aircraft again." By that logic every single commercial aircraft would be in the junkyard... Repairing malfunctioning systems is normal, attempting two different repairs isn't uncommon either.
If you think I've changed my argument, you misunderstood my comments. I still think that they flew a broken aircraft.
I'll stand by my statement that 610 should never have taken off, and I'm somewhat surprised that it is contentious. I don't care if all the protocols were followed and the logs made (though obviously the pilots of 610 didn't understand what the previous pilots had done to respond to their incident) - in retrospect, we know that the aircraft was not airworthy going into flight 610, so something needs to change so that next time that is detected before takeoff. Whether that is better observation of the protocols or better protocols, I'm not sure.