Followers | 101 |
Posts | 15347 |
Boards Moderated | 3 |
Alias Born | 12/06/2008 |
![](https://investorshub.advfn.com/uicon/138035.png?cb=1536931479)
Sunday, October 27, 2019 2:06:23 PM
During certification flights the MAX did not meet the stick force curve requirements under certain adverse loading conditions, high thrust settings and high bank angles. Specifically 14 CFR 25.175(1):
(1) With the landing gear retracted at high speed, the stick force curve must have a stable slope at all speeds within a range which is the greater of 15 percent of the trim speed plus the resulting free return speed range, or 50 knots plus the resulting free return speed range, above and below the trim speed (except that the speed range need not include speeds less than 1.3 VSR1, nor speeds greater than VFC/MFC, nor speeds that require a stick force of more than 50 pounds), with—
(i) The wing flaps retracted;
(ii) The center of gravity in the most adverse position (see §25.27);
(iii) The most critical weight between the maximum takeoff and maximum landing weights;
(iv) 75 percent of maximum continuous power for reciprocating engines or for turbine engines, the maximum cruising power selected by the applicant as an operating limitation (see §25.1521), except that the power need not exceed that required at VMO/MMO; and
(v) The airplane trimmed for level flight with the power required in paragraph (b)(1)(iv) of this section.
Boeing's fix was MCAS which receives angle of attack information from the left side angle of attack sensor (the unit that apparently was improperly repaired in Florida). The fundamental flaw with that design though, is that it sets up a possible scenario where the failure of one single unit (the AOA sensor) caused two separate problems. That kind of engineering logic runs counter to the concept of designing aircraft systems to avoid introducing "single points of failure" at all, much less single points that produce two problems (erroneous stall indication and firing of the MCAS simultaneously).
Apparently Boeing engineers discounted this scenario. But Murphy's Law prevailed when the design was tested in a combination involving faulty maintenance, lack of complete systems testing after maintenance, pilots who displayed poor basic airmanship skills, and a company culture that allowed an aircraft to be dispatched on a passenger flight with a known and dangerous scenario that had just been experienced on that plane's previous flight.
There is lots of blame to pass around, and Boeing's design philosophy does deserves to take a chunk of it.
Recent BA News
- Apple Delays AI Features, Abbott Shares Plunge 7% After $495M Fine, Philips Soars 10% • IH Market News • 07/29/2024 10:24:10 AM
- Alphabet Unveils AlphaProof and AlphaGeometry 2; OpenAI Tests SearchGPT; Apple Loses Market Share in China • IH Market News • 07/26/2024 10:07:41 AM
- NBA Signs Billion Dollar Broadcast Deal, CrowdStrike Criticized for Insufficient Reward, Honda Shuts Down Chinese Factory • IH Market News • 07/25/2024 10:15:46 AM
- Boeing Provides Digital Flight Operations Solution for Ryanair • PR Newswire (US) • 07/24/2024 12:00:00 PM
- Meta Unveils Llama 3 AI Model, Elon Musk’s X Poll Backs Tesla’s $5B xAI Investment, and More • IH Market News • 07/24/2024 09:53:32 AM
- Qatar Airways Announces Order for 20 More Boeing 777-9 Passenger Jets • PR Newswire (US) • 07/23/2024 01:54:00 PM
- Qatar Airways Announces Order for 20 More Boeing 777-9 Passenger Jets • PR Newswire (US) • 07/23/2024 01:47:00 PM
- Macquarie AirFinance Places First Boeing Order with Purchase of 20 737 MAX Jets • PR Newswire (US) • 07/23/2024 12:30:00 PM
- Macquarie AirFinance Places First Boeing Order with Purchase of 20 737 MAX Jets • PR Newswire (US) • 07/23/2024 12:22:00 PM
- Johnson Controls Division Sold for $8 Billion; Alphabet’s Offer Rejected by Wiz; AMD President Announces Retirement • IH Market News • 07/23/2024 10:00:52 AM
- BAE Systems to Deliver Advanced Microelectronics to U.S. Defense Industrial Base • Business Wire • 07/22/2024 04:00:00 PM
- Boeing Projects Global Need for Nearly 2.4 Million New Commercial Pilots, Technicians, Cabin Crew • PR Newswire (US) • 07/22/2024 03:00:00 PM
- Lufthansa Technik, Boeing Sign License Agreement for 787 Dreamliner Cabin Modifications • PR Newswire (US) • 07/22/2024 12:46:00 PM
- Japan Airlines Will Modernize Fleet with up to 20 More Boeing 787 Dreamliners • PR Newswire (US) • 07/22/2024 12:13:00 PM
- Japan Airlines Will Modernize Fleet with up to 20 More Boeing 787 Dreamliners • PR Newswire (US) • 07/22/2024 12:07:00 PM
- Luxair Selects Largest Boeing 737 MAX Model, Buying up to 4 737-10 Jets • PR Newswire (US) • 07/22/2024 11:19:00 AM
- Luxair Selects Largest Boeing 737 MAX Model, Buying up to 4 737-10 Jets • PR Newswire (US) • 07/22/2024 11:12:00 AM
- Korean Air Commits to Up to 50 Boeing Widebodies to Strengthen Future Long-Haul Fleet • PR Newswire (US) • 07/22/2024 10:33:00 AM
- National Airlines Selects Four Boeing 777 Freighters to Expand Global Fleet • PR Newswire (US) • 07/22/2024 10:15:00 AM
- Korean Air Commits to Up to 50 Boeing Widebodies to Strengthen Future Long-Haul Fleet • PR Newswire (US) • 07/22/2024 10:10:00 AM
- Berkshire Sells BofA Holdings, Ryanair Shares Drop 12%, Delta Still Struggling After IT Disruption • IH Market News • 07/22/2024 09:44:17 AM
- National Airlines Selects Four Boeing 777 Freighters to Expand Global Fleet • PR Newswire (US) • 07/22/2024 09:29:00 AM
- Boeing Forecasts Demand for Nearly 44,000 New Airplanes Through 2043 as Air Travel Surpasses Pre-Pandemic Levels • PR Newswire (US) • 07/19/2024 11:00:00 PM
- Microsoft Shares Drop 2% and CrowdStrike Plunges 21% Pre-Market Following Major Global Outage • IH Market News • 07/19/2024 10:01:22 AM
FEATURED Cannabix Technologies to Deliver Innovative Breath Logix Alcohol Screening Device to Texas, USA • Jul 29, 2024 9:07 AM
INDEXR AI Merges With Moon Equity Holdings Corp. (MONI), Creating a Leading-edge Technology Company • MONI • Jul 29, 2024 9:59 AM
BNCM AND DELEX UNVEIL POST-MERGER MANAGEMENT PLANS • BNCM • Jul 29, 2024 9:00 AM
Glidelogic Corp. Announces Revolutionary AI-Generated Content Copyright Protection Solution • GDLG • Jul 26, 2024 12:30 PM
Southern Silver Files NI43-101 Technical Report for its Updated Preliminary Economic Assessment for the Cerro Las Minitas Project • SSV • Jul 25, 2024 8:00 AM
Greenlite Ventures Completes Agreement with No Limit Technology • GRNL • Jul 19, 2024 10:00 AM