What Went Wrong at Boeing: How a Quality Culture Broke Down

What went wrong at Boeing was not a lack of demand, money or factories but a breakdown in process capability: the ability to build aircraft right, every time, at the rate the business needed. Over two decades the company moved its focus from engineering and production toward financial returns, outsourced critical work and pushed rates faster than its system could absorb. The 737 MAX crashes of 2018–19 and the door-plug blowout of January 2024 were the visible results.

The door plug is the clearest case because nothing in the aircraft's design failed. On 5 January 2024, a panel blew out of Alaska Airlines Flight 1282, a 737 MAX 9 about ten weeks old. Its fuselage had been built by Spirit AeroSystems in Wichita, Kansas, and shipped to Boeing's final-assembly plant in Renton, Washington. There the plug had been opened so workers could rework damaged rivets nearby, and it was put back without the four bolts that hold it in place. No record of the removal was made (reported; NTSB). No one died. But a step done and not documented cost Boeing control of its own production rate for almost two years.

What happened to Boeing's quality?

Boeing had presented its 737 line in Renton as a lean showcase for years. Its problems were not a lack of lean tools. They were a breakdown of the system around those tools: schedule pressure, work arriving out of sequence from suppliers, a weakened link between engineering and production, and inspection reduced over time (reported). The National Transportation Safety Board, adopting its probable cause in June 2025, placed the failure in Boeing's inadequate training, guidance and oversight for removing and reinstalling parts, and in ineffective oversight by the FAA.

Process capability is the factor in the book's four-factor equation that is hardest to buy and easiest to lose. It lives in people, procedures and habits, and it decays quietly. A rate increase that outruns training, a supplier squeezed until it cuts inspection, a rework step nobody records: none of these shows up in a quarter's numbers. All of them showed up at Boeing.

How did Boeing's culture change?

Most accounts of the crisis start in 1997, when Boeing merged with McDonnell Douglas. McDonnell Douglas was the weaker commercial aircraft maker and a strong defense contractor, and its managers, led by Harry Stonecipher, are widely reported to have brought a sharper focus on cost, return on capital and the share price. That cultural reading is contested, and the book treats it as interpretation rather than fact. What is not contested is the sequence of decisions that followed.

In 2001 Boeing moved its headquarters from Seattle to Chicago, away from the factories. In 2004 it launched the 787 with risk-sharing partners that would design, build and largely fund complete sections of the airframe. In 2005 it sold its Wichita fuselage operation to the investment firm Onex for about $1.2 billion (reported), creating Spirit AeroSystems. Each decision followed an asset-light logic: let suppliers carry the capital and the labor, and keep design authority, final assembly and the customer.

Why did the 737 MAX crash?

In 2011 Boeing chose to re-engine the 737 rather than design a new single-aisle aircraft. Airbus's A320neo was winning orders, and a derivative kept the Renton line, the Wichita fuselage and most of the tooling, and avoided a new pilot type rating that airlines would have to pay to train for. The larger engines changed the aircraft's handling at high angles of attack, so Boeing added software called MCAS that could command nose-down trim based on input from one angle-of-attack sensor, and it was not described in pilot manuals (reported in the official investigations).

Two MAX aircraft crashed, in October 2018 and March 2019, killing 346 people (reported). The fleet was grounded for about 20 months. In January 2021 the Justice Department resolved a charge of conspiracy to defraud the FAA through a deferred-prosecution agreement worth about $2.5 billion, including $1.77 billion for airline customers (8-K). That case ended on 6 November 2025, when a federal judge approved the government's motion to dismiss in favor of a non-prosecution agreement.

The crashes were a design and certification failure, not a factory failure. But they set the conditions for the door plug. The grounding and then the pandemic emptied Boeing's cash, and the company needed to raise the production rate quickly to recover it.

How did outsourcing make it worse?

The 787 showed the first kind of outsourcing mistake. Sections arrived in Everett late and incomplete, with missing fasteners and paperwork, and Boeing had to finish them on its own line, which the industry calls travelled work. First delivery came in September 2011, more than three years late (reported). Under program accounting, the extra cost of the early aircraft sat on the balance sheet as deferred production costs. At the end of 2025, fourteen years after the first delivery, Boeing still carried about $13.86 billion of them (10-K).

The Wichita sale showed the second kind. A supplier that depends on one customer for most of its revenue, sells under fixed prices with annual price cuts and must invest ahead of that customer's rate increases carries the customer's volume risk on a much smaller balance sheet. Boeing pressed Spirit on price. The MAX grounding cut its volume. Then Boeing wanted fuselages faster than Spirit could build them well. In August 2023 Spirit disclosed misdrilled holes in aft pressure bulkheads, and five months later came the door plug on a Spirit-built fuselage.

Under the FAA's cap, Boeing could take fewer fuselages. Spirit, staffed for more, burned cash. On 18 April 2024 Boeing agreed to advance it $425 million against future deliveries. The book's chapter on make or buy models a supplier in Spirit's position with invented numbers: priced to earn about $31 million a year at 52 aircraft a month, it breaks even at about 46, and a cap at 38 with staff hired for 52 costs it about $85 million a year.

What did the door plug cost Boeing?

The FAA's proposed civil penalty, $3.1 million, was the smallest cost. The cap at 38 a month was the largest, because aircraft production has very high operating leverage: the fixed cost of the plants, tooling and engineering is absorbed only at rate. Chief executive Dave Calhoun announced in March 2024 that he would leave; Kelly Ortberg succeeded him in August.

About 33,000 machinists struck on 13 September 2024 and stayed out for 53 days, ratifying a contract on 4 November with 59% of the vote that raised wages by 38% over four years (reported). Boeing lost $11.8 billion in 2024 and burned $14.3 billion of free cash flow. In October 2024 it sold $24.25 billion of common and mandatory convertible preferred stock, the largest follow-on equity offering on record (reported), and kept its investment-grade rating.

Then it bought back the supplier it had sold. Boeing agreed on 1 July 2024 to acquire Spirit and completed the deal on 8 December 2025, at a value of about $8.3 billion including Spirit's debt (reported). About 15,000 Spirit employees at five sites joined Boeing. Airbus took the sites that build its own structures, with more than 4,000 employees, and received $439 million of compensation, subject to adjustments. Each customer was buying control of the process capability its own production depended on.

Is Boeing fixed now?

By the autumn of 2026 the factory was recovering, slowly. The FAA renewed Boeing's delegated certification authority from 1 June 2025, allowed 42 aircraft a month in October 2025, and from 20 July 2026 let Boeing issue airworthiness certificates for its own 737 MAX and 787 aircraft again. Boeing delivered 600 commercial aircraft in 2025, its most since 2018, and returned to a net profit of $2.2 billion, though only because of a $9.6 billion gain on selling its Digital Aviation Solutions business (company).

In the third quarter of 2026 it delivered 161 commercial aircraft and generated about $464 million of free cash flow, and its backlog reached a record $745 billion, including more than 6,300 commercial aircraft (company). But Commercial Airplanes still lost about $697 million on about $10.72 billion of revenue (reported). The 737 moved to 47 a month in the second quarter on the framing of Boeing's 10-Q, but stable output at that rate slipped to early 2027, and the roughly 500 737 deliveries targeted for 2026 will be missed (reported).

What changed most was the relationship with the regulator. The FAA now approves rate increases on quality metrics and kept inspectors in the plants even after restoring certificate issuance. In a duopoly, airlines cannot easily switch suppliers, which is why Boeing kept its customers and booked 1,173 net orders in 2025 (reported). But the cushion is a license, not a moat. It holds only while regulators and passengers trust the product, which is the argument of the book's chapter on quality, safety and the license to operate.

What other manufacturers can learn from Boeing

The first lesson is that the four factors set ceilings on one another. Boeing had a product airlines wanted, a backlog measured in thousands of aircraft and, after October 2024, a repaired balance sheet. None of it raised output until the company had shown the FAA, with data, that it could build the aircraft right. Process capability became the binding constraint on the other three.

The second is that outsourcing moves risk, not just work. Twenty years of fixed prices and rate swings moved margin from Spirit to Boeing, and in the end moved risk back from Spirit to Boeing, with interest. The comparison of contract manufacturing vs in-house production sets out when buying a critical part makes sense and when it does not.

The third is that capability is never owned outright. Toyota's own quality crisis of 2009–10 followed a decade of fast expansion, and the explainer on the Toyota Production System shows how even the system's inventor had to slow down and rebuild. Boeing's crisis fits a wider pattern covered in the guide to how manufacturing companies make money: capability is overrun by something an organization values more at the time, whether growth, a schedule or a margin.

The takeaway

Boeing's crisis turned on process capability, the factor that is hardest to buy and easiest to lose. The company had demand, capacity and, after 2024, capital, but a factory system weakened by outsourcing, schedule pressure and thinning inspection let four bolts go missing, and the regulator then set its production rate. Buying back Spirit and tying rates to quality metrics are the right repairs, but the stable 47-a-month rate slipping into 2027 shows how slowly capability returns once lost. The full case, and the 787's program accounting behind it, is told in Chapter 1 of The Production Equation, available to preview on the book page.