Leeham News and Analysis
There's more to real news than a news release.
Leeham News and Analysis
- Bjorn’s Corner: Air Transport’s route to 2050. Part 27. June 20, 2025
- Pontifications: A Personal Note June 19, 2025
- Airbus books 142 firm orders as Boeing retracts from the Paris Air Show June 19, 2025
- AIN Media Group Agrees to Acquire Leeham News & Analysis June 17, 2025
- Five for Five: Air India crash points to systemic problems at Boeing that CEO Ortberg must fix June 15, 2025
Ethiopia issues preliminary report of ET302 accident
April 4, 2019: Ethiopian aviation crash investigators today issued the preliminary report into the Ethiopian Airlines ET302 crash.
The report may be downloaded here: Preliminary Report B737-8 MAX (ET-AVJ).
LNA will have a report on the finding today or tomorrow.
Green aircraft builder may need infusion of greenbacks
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By Bryan Corliss
April 4, 2019, © Leeham News: While one Western Washington electric aircraft company is charging forward with battery-powered flight, another may be encountering headwinds.
Zunum, which has announced plans to put a hybrid-electric-powered aircraft into the air before the year’s end, may need a cash infusion if it’s to stick to that time line.
Unlike MagniX – which announced March 26 a deal with Vancouver’s Harbour Air to start putting electric motors into the airline’s existing fleet of seaplanes – Bothell-based Zunum is pursuing a clean-sheet aircraft design.
Summary
- Electric plane builder Zunum plans to fly hybrid test aircraft this year.
- The company says it plans to announce a manufacturing site — or maybe an airframing partner — in 2020.
- Reports say the company needs more investor cash to avoid schedule slips.
Read more
ET302 used the Cut-Out switches to stop MCAS
By Bjorn Fehrm
Note: The article offered a Video as an example of the effects of not trimming to neutral before hitting Cut-Off. After reviewing the effects of the video in the context of the article, MentourPilot decided we should leave the text but not include the video any longer. MentourPilot’s YouTube channel is an independent initiative to offer the public correct and positive information of all the work which is behind their safe travel in the skies. In the sensitive situation of an ongoing investigation of the crash of ET302, where not all facts are on the table, he concluded after discussing the impression the video left with a colleague, it was not in line with his intent of setting up the channel. In the haste of the change we took this as his company not wanting the video aired, it was not. As facts in the ET302 case comes forward we will discuss with MentourPilot if this situation changes.
April 03, 2019, © Leeham News: The crew of Ethiopian Airlines ET302, which crashed with 157 people on board, used the prescribed Stabilator Trim Cut-Out switches to stop MCAS, according to an article by Wall Street Journal today. Yet still, they crashed. We’ve had the information this could indeed be the case for several days, but we didn’t want to speculate in such a sensitive matter.
The Wall Street article cites information coming from the investigation. By it, we can now reveal how it’s possible the aircraft can crash despite using the Cut-Out switches. To verify, we ran it all in a simulator together with MentourPilot Youtube channel over the last days.
Figure 1. ET302 ground speed as long as FlightRadar24 could follow the flight. Source: FR24.
Returning the MAX to service
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Introduction
April 1, 2019, © Leeham News: Returning the Boeing 737 MAX to services following its grounding should reasonably be a straight-forward affair, if past groundings were examples.
But, to mix a metaphor, there are plenty of unchartered waters with this grounding that stand ready to complicate matters.
Bloomberg reported Saturday that Europe’s FAA equivalent, EASA, skipped last week’s Boeing meeting of 200 pilots and regulators.
Summary:
- US FAA is no longer the leader or gold standard.
- EASA, Transport Canada want their own reviews.
- China, the first to ground the MAX, also suspended plane-by-plane certification.
Pontifications: I don’t know what to make of this
By Scott Hamilton
April 1, 2019, © Leeham News: One can’t help but think, a lot, about the two Boeing 737 MAX crashes and the facts that Boeing created the system, linked it to one sensor, not two, didn’t tell the airlines pilots about it, didn’t include it in pilot manuals, didn’t have a safety alert system as standard equipment, initially blamed the Lion Air pilots and reportedly lobbied Donald Trump not to ground the airplanes.
But my thoughts haven’t stopped here.
Bjorn’s Corner: The Ethiopian Airlines Flight 302 crash, Part 3.
By Bjorn Fehrm
March 23, 2019, ©. Leeham News: Boeing this week presented how they plan to get the 737 MAX back in the air again. MCAS has a fix.
We look at what the fix tells us about the first implementation and the rationale behind its implementation.
Figure 1. The improved Pilot’s Primary Flight Display presented Wednesday. Source: Boeing.
WTO appeals court rules against Boeing; Airbus claims minimum $15bn in harm
March 28, 2019, © Leeham News: The World Trade Organization appeals panel today upheld European claims that Boeing received billions of dollars in illegal tax breaks and subsidies from the US Department of Defense, Washington State, Kansas and South Carolina.
From a previous set of rulings, the WTO also agreed that the US and Boeing failed to cure illegal tax breaks used under a federal program called Foreign Sales Corporations of FSC (pronounced fisk) dating to before 2006.
The adverse decision comes at a time when Boeing is on the defensive over two fatal accidents of its 737 MAX program and criticism over the development and approval of the MCAS stall recovery system believed by some to be at the heart of two crashes.
MCAS upgrade requires half-hour of pilot training
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Introduction
March 28, 2019, © Leeham News: Boeing 737 MAX pilots learning about the revised software upgrade to the Maneuvering Characteristics Augmentation System (MCAS) will need a half hour of computer-based training (CBT), the company told the media yesterday in a briefing.
Pilots of the 737 NG who have not yet made the transition to the MAX also have to be trained on the MCAS now. Boeing did not specify if this will take longer than those already trained on the MAX.
- Related article: Boeing presents MCAS software fix details
Summary
- No estimate to MAX return to service.
- Waiting for investigations of the crashes.
- More information for pilots.
Boeing presents MCAS fix to pilots, regulators and media
By Bjorn Fehrm
March 27, 2018, © Leeham News.: Boeing presented the software fix to the MCAS problem in a press briefing ahead of meeting 200 Pilots and Regulators in Seattle today for a briefing around the 737 MAX update.
Here is what Boeing presented in its briefing to media:
Figure 1. Pilot’s Primary Flight Display with modifications after the software update. Source: Wikipedia and Leeham Co.
Canada’s Harbour Air to fit electric engines on its plane
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Introduction
By Bryan Corliss
March 26, 2019, © Leeham News: A Seattle-area engine manufacturer today will announce a significant step toward actually getting an electric-powered passenger aircraft off the ground.
The company, MagniX, is set to announce a partnership with Canada’s Harbour Air to retrofit its fleet of 33 piston-powered de Havilland Beavers, Otters and Twin Otters with 750 hp electric engines.
Harbour Air will equip its fleet of 33 aircraft, including the de Havilland Twin Otter, with electric engines. Source: harbour Air.
The first electric-powered flight – in a six-passenger Beaver – will take place before the end of 2019, according to MagniX CEO Roei Ganzarski. MagniX and the Vancouver-based airline plan to pursue a supplemental type certificate for the planes, with a goal of 2021 for EIS.
Modifications will take place at a plant in Vancouver, a spokeswoman said.
Summary
- Overcoming skepticism.
- Tested engine, proven airframe.
- Short-haul routes.