Leeham News and Analysis
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Books for Christmas gifts
By Scott Hamilton
Dec. 9, 2025, © Leeham News: I thought 2025 was rather light on good, new aviation books (my own, The Rise and Fall of Boeing and the Way Back, being an obvious exception!). So, there will be a couple of non-aviation books on this year’s list and some that were published earlier but which I read this year.
Skies of Thunder
Skies of Thunder: The Deadly World War II Mission Over the Roof of the World, by Caroline Alexander (2024).
This is a book for which misplaced expectations will drive the reader’s enjoyment. The title and the cover imply the focus is on flying the Hump, the massive airlift of World War II over the Himalaya Mountains from India into China. In reality, this book is more focused on the greater China-Burma-India theatre. Alexander describes the politics within the United States military and War Department, all the way up to President Roosevelt; and between the US and Britain, which had very different views of the viability of supporting China’s leader, Chiang Kai- Shek, whose corruption was legendary even in real time, and whose motives were more about maintaining his position vis-à-vis the Chinese Communists.
The CBI theatre didn’t get the attention that the European/African war against Germany and Italy did, nor the war against the Japanese. It’s an interesting story filled with descriptions of the characters involved. If your expectations are thus set, this is a good read.
However, for a far more detailed description of the Hump war, 2012’s China’s Wings by Gregory Crouch is the better book.
Supply chain continues to bedevil Airbus, Boeing
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By Scott Hamilton
Dec. 8, 2025, © Leeham News: Supply chain difficulties continue to bedevil Airbus and Boeing deliveries this year.
Embraer also has had some impact from supply chain disruptions, but at a much lower rate.
November deliveries by Airbus and Boeing are lower than in September and October. Boeing delivered 53 and 55 aircraft, respectively—but only 42 in November.
Airbus and Boeing are struggling to meet production goals because the supply chain still can’t delivery parts and engines on time. In some cases, quality also is a factor. Photo Credit: Airbus.
Airbus delivered 78 aircraft in October and 73 in September. Defective panels delivered by a supplier, which Airbus did not identify, for the A320 family were discovered, impacting total November deliveries (72) and anticipated December deliveries. Airbus now expects to deliver 790 aircraft this year compared with its original guidance of 823. Airbus delivered 84 aircraft in November last year. Airbus needs to deliver 133 aircraft this month to meet its revised, lower goal.
In addition, delays in receiving interiors, mainly from Collins and Safran but also from others, caused Airbus and Boeing to delay widebody deliveries. Continuing shortages of engines from Pratt & Whitney and CFM (GE and Safran) for the GTF and LEAP impacted Airbus, Boeing and Embraer. PW continues to divert new production GTFs to AOG (Aircraft on Ground) A220s, A320s and E-Jets. A strike at GE interrupted CFM LEAP deliveries.
Airbus and Boeing want to increase production rates next year and in following years. The supply chain is the driving factor.
Aerospace analyst Ken Herbert from RBC Capital Markets raises some caution from the supply chain in his survey for the second half of 2025. In a report issued on Dec. 4, Herbert wrote, “Just when confidence in the aerospace OE outlook appears to have inflected, we get a reminder from Airbus (ELAC software, metal fuselage panel quality escape) that the industry is still dependent on a relatively fragile supply chain, and we believe the supply chain will remain part of the A&D narrative for the foreseeable future.”
Bjorn’s Corner: Faster aircraft development. Part 19. Flight Test Aircraft Assembly.
December 5, 2025, ©. Leeham News: We do a series on ways to shorten the long development times for large airliners. New projects aim to cut development time and achieve certification and production faster than previous projects.
The series will discuss the typical development cycles for an FAA Part 25 aircraft, called a transport category aircraft, and the different approaches to reducing development time.
We will use the Gantt plan in Figure 1 as a base for our discussions. We have exited the Detailed Design phase after conducting Critical Design Reviews, CDRs, and now enter into Prototype Manufacturing. After reviewing the acceptance and testing of the first parts and systems from suppliers, we now discuss putting together the first flight-test aircraft.
Figure 1. A generic new Part 25 airliner development plan. Source: Leeham Co. Click to see better.
** Special thanks to Ron Everlove for helping with this article **
Comments on freewall posts are closed for now
Dec. 4, 2025: Due to repeated violations of Reader Comment Rules by a select few, who have ignored warnings, comments on news freewall articles and some more recent articles are closed for the rest of the year.
Comments remain open on Paywall articles.
The state of alternative propulsion aircraft? Part 4.
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By Bjorn Fehrm
December 4, 2025, © Leeham News: In our series about alternative propulsion aircraft, last week we looked at the aircraft batteries. These are heavy components with very low energy capacity per unit weight.
To illustrate the kind of aircraft-level challenges the batteries pose, we are using our Aircraft Performance and Cost Model (APCM) to design a typical alternative-propulsion battery-electric aircraft and then fly it on typical missions.
The aircraft is similar in size to a 9-seat Tecnam P2012 commuter (Figure 1) but optimised for Battery-Electric propulsion.
Figure 1. The Tecnam P2012 nine-seater commuter. Source: Tecnam.
The APCM will give us the airframe-level energy consumption for each phase of the flight. Subsequently, we can add the different losses in the propulsion system to determine the energy consumed from the battery and the endurance/range it offers, dependent on VFR or IFR mission reserves.
Boeing CFO Jay Malave: Priorities are debt, investments, then shareholders
By Karl Sinclair
Dec. 3, 2025, © Leeham News: Boeing’s chief financial officer outlined the priorities for the use of cash going forward, and it reaffirms what has been obvious but largely unstated: debt reduction is the top priority.
Speaking at the UBS Global Industrials and Transportation Conference, The Boeing Company’s (BA) new Chief Financial Officer (CFO) Jay Malave reiterated the corporation’s prudent position on where Free Cash Flow (FCF) was going to be spent.
“I think that between the balance that we have today, the cash flow that we’re going to be generating, that will give us plenty of optionality to pay down the debt, to invest in the future, and start thinking at the right time about investor returns,” Malave said.
Boeing CFO Jay Malave. Source: Boeing.
This is quite a departure from the position of the previous CFO Greg Smith, who once reported that Boeing was committed to returning 100% of FCF to investors. It is very much in line with the new culture that CEO Kelly Orberg is attempting to instill in the company.
Boeing’s “hangover” of the MAX is over, says former acting FAA administrator who dealt with crisis
By Scott Hamilton
Dan Elwell, former acting administrator of the Federal Aviation Administration. Credit: Alaska Airlines.
Dec. 3, 2025, © Leeham News, Washington (DC): Boeing’s “hangover” and PTSD (post-traumatic stress syndrome) following the 737 MAX crisis of 2019 and beyond is over, says the former acting administrator of the Federal Aviation Administration (FAA) who had to deal with the fallout before Congress.
Dan Elwell faced investigations from hostile Congressional hearings, a criminal probe, civil litigation, an Inspector General’s inquiry from the FAA’s parent department, and in-depth reporting from many newspapers and television media in the months after the second of two MAXes crashed in March 2019, five months after the first fatal accident. The probes, lawsuits and civil and criminal discoveries revealed serious safety and quality control shortfalls at Boeing and shortcomings of the FAA’s oversight of the company and certification of the MAX.
“The FAA still is sort of feeling and nursing sort of the wounds,” Elwell said during an appearance on Dec. 2 at the monthly luncheon of the AeroClub of Washington (DC). “There was a certain amount of MAX PTSD after the pressures that hung around for a while” at Boeing and the FAA.
Elwell said that the biggest challenge he felt was trying to get both the agency and the “really outstanding engineers and people” who work at Boeing to sort of put it behind them, and do what they know best with confidence. Then, Elwell said, it was necessary to support those who were doing what they know how to do best.
“I think…the FAA is getting there,” he said, adding that Boeing is also making progress. Then company is meeting Key Performance Indicators (KPIs) that they’re following, and recently received FAA approval to increase the 737 production rate from 38/mo to 42/mo. Boeing wants to further increase rates to 47/mo and 52/mo in two “rate breaks” next year.
The airliners of tomorrow: understanding the opportunities
Bjorn Fehrm (right) discusses the industry’s challenges with Nico Buchholz (left). Credit: Charlotte Bailey, Leeham News.
By Charlotte Bailey
Dec. 2, 2025, © Leeham News: As aerospace companies, investors, and industry analysts gather in Amsterdam for the second iteration of the annual Future Aero Festival, the attributes and advantages offered by clean-sheet aircraft concepts are in the spotlight.
The first program point was when Bjorn Fehrm, analyst and consultant at Leeham Co., and Nico Buchholt, president and deputy CEO of BermudAir, were interviewed by Sustainable Aero Lab’s founder and CEO, Stephan Uhrenbacher.
The ’next big aircraft program’: a simultaneously inevitable yet somehow elusive concept OEMs and airlines alike are already considering with a view to future operations. Certainly, the scale of the challenge facing aircraft developers is significant.
From alternative propulsion strategies to entirely clean-sheet designs, industry insiders agree that tomorrow’s airliners are likely to be substantially different from currently operational concepts. But how are these ideas starting to shape up, and what is currently understood about commercial aviation’s future direction?
An aircraft is a “production tool for an airline: it exists to satisfy a certain need,” clarified Nico Buchholz. Although Buchholz has personally participated in the launches, demo flights, and entry into service of more than ten aircraft types, “on the other side, we see the slowness” of development, he added.
Fehrm of Leeham Co believes that a combination of motor, generator, and battery “makes a lot of sense on turbofans and turbofan engines,” he said, citing complexities with gas turbine acceleration and deceleration. “You actually have to design the engine a little less efficiently because of that. So, if you have the electrical motor in there to help, you can actually make a more efficient engine.” Read more
Book excerpt: Legacy Boeing’s last hurrah
Dec. 1, 2025, (c) Leeham News: In October, Boeing announced another delay in certification of the 777X and a delay from 2026 to 2027 of entry-into-service of the -9 model. Tim Clark, the president of Emirates Airline, is vocal about his dismay over the continuing delays. Emirates has more 777Xs on order than any other customer. The first airplane was due in early 2020. Had it been on time, Clark says Emirates would have had 110 in service by now.
During the Dubai Air Show, he told the financial news network CNBC that he believes Boeing can restore its glory. He doesn’t know or predict when. But legacy Boeing’s last hurrah was the development of what is now called by some to be the “Classic” 777.
Scott Hamilton’s new book, The Rise and Fall of Boeing and The Way Back, details not only how Boeing lost its glory and how it’s recovering. It tells the story of legacy Boeing’s last hurrah: development of the 777 Classic.
Here is an excerpt.
Airbus rolls out prototype A350F in march toward 2026 certification
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By Scott Hamilton and Bjorn Fehrm
Dec. 1, 2025, © Leeham News: Airbus rolled its first A350F out of the factory last week. It now moves to another building for the installation of systems and engines. The first flight is planned for the third quarter next year, as a second freighter is completed to begin regimented flight testing.
Airbus hopes to deliver the first freighter in the second half of 2027.
Figure 1. The first Airbus A350F rolled out of the factory this month. Source: Airbus.
Boeing’s new freighter, the 777-8F, is still a “paper” airplane. With 59 orders from six customers, entry into service (EIS) is now estimated for 2029 (some say 2030). Airbus has more than 80 orders from 13 customers. Airbus claims a 58% market share of new freighter orders.
A350F sales fall short of the 120 sales for new-build A300-600Fs, Airbus’ best-selling freighter, most of which went to package operators FedEx and UPS. However, neither has chosen between the A350F or the 777-8F for their next airplanes to replace the decades-old Boeing (McDonnell Douglas) MD-11Fs. The future of these aircraft is uncertain following the Nov. 4 crash of a UPS jet in Louisville (KY).
Within days of the accident, which killed three pilots and 11 people on the ground, Boeing recommended grounding the nearly 60 MD-11 freighters on the US registry for inspections. The Federal Aviation Administration (FAA) made the grounding mandatory shortly after.
Related Stories
- UPS crash presents potential opportunities for Airbus’ A350F
- Airbus sticks to 2027 EIS for A350F (Briefing pre-Dubai Air Show)