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Worst possible news for Boeing
| September 24th, 2019 at 3:45:35 AM permalink | |
| AcesAndEights Member since: Oct 24, 2012 Threads: 6 Posts: 351 |
I did a quick google and didn't see any recent news, could you share from where you sourced that quote? "You think I'm joking." -EvenBob |
| September 27th, 2019 at 8:09:58 PM permalink | |
| Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831 | recent rave review of the neo released on youtube. the Electric Neo motorized glider |
| September 27th, 2019 at 8:18:49 PM permalink | |
| Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831 | Boeing to no longer be permitted to rely on well-trained test pilots. Reaction times and computer interface time to be determined by pilots of ordinary skills and training. |
| September 28th, 2019 at 2:04:04 AM permalink | |
| Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569 |
https://www.seattletimes.com/seattle-news/times-watchdog/the-inside-story-of-mcas-how-boeings-737-max-system-gained-power-and-lost-safeguards/ By recent I mean in the last three months While most of the stories about the MAX have focused on the "disagree light" between the two AoA sensors, I thought it was far more significant that for four years the design required both a poor AoA reading and high G force. I have only read about the G force requirement (that was removed) in this one article. While it seems perfectly sensible that a bird strike could destroy an AoA sensor, and it is incredibly poor design to have the lives of the entire passenger list dependent on a single sensor - it is much harder to have a sensor misread high G forces. Plus the odds of the G force sensor and the AoA sensor failing at the same time are minimal. I did find this one paragraph too brief in discussing the "other problem".
The March article was not much more helpful. https://www.seattletimes.com/business/boeing-aerospace/failed-certification-faa-missed-safety-issues-in-the-737-max-system-implicated-in-the-lion-air-crash/ |
| October 7th, 2019 at 8:58:37 PM permalink | |
| Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831 | Southwest's pilot union sues Boeing for lost wages due to their rush to sell an unsafe product in an unjust and misleading manner. Damages alleged at over 100 million dollars as all those planes were either totally grounded or awaiting maintenance and therefore pilots lost both normal wages as well as overtime and flight time for their logbooks and pension program. |
| October 25th, 2019 at 6:23:21 AM permalink | |
| Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831 | Grounding costs over one billion dollars. Indonesia releases report distributing blame but emphasizing Boeing's design assumptions, lack of oversight and making Angle Of Attack Sensor Disagreement Resolution only available as an added option. Admits to imprecise communication between crew and maintenance personnel. |
| October 25th, 2019 at 3:27:31 PM permalink | |
| Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569 |
That conclusion was an easy one to make. |
| October 25th, 2019 at 4:59:05 PM permalink | |
| Fleastiff Member since: Oct 27, 2012 Threads: 62 Posts: 7831 | yes. Worse perhaps was burying that option inside a package, so it was less obvious as a hazard. To a salesman it was a get in fly it situation using existing personnel. To an engineer it was bigger, heavier and more powerful, particularly during certain phases of flight wherein the computer would do what it thought right even if that data came from only one AOA sensor. |
| October 29th, 2019 at 6:42:04 PM permalink | |
| petroglyph Member since: Aug 3, 2014 Threads: 25 Posts: 6227 | The last official act of any government is to loot the treasury. GW |
| October 29th, 2019 at 10:51:17 PM permalink | |
| Pacomartin Member since: Oct 24, 2012 Threads: 1068 Posts: 12569 | Interesting story on QF7. It's interesting to hear one about an Airbus jet where they had redundant Angle of Attck sensors. The aircraft was fitted with three air data inertial reference units (ADIRU) to provide redundancy for fault tolerance, and the Flight Control Primary Computers (FCPC) used the three independent Angle of Attack (AOA) values to check their consistency. In the usual case, when all three AOA values were valid and consistent, the average value of AOA 1 and AOA 2 was used by the FCPCs for their computations. If either AOA 1 or AOA 2 significantly deviated from the other two values, the FCPCs used a memorised value for 1.2 seconds. The FCPC algorithm was very effective, but it could not correctly manage a scenario where there were multiple spikes in either AOA 1 or AOA 2 that were 1.2 seconds apart. |