Boeing and Spirit AeroSystems: Reintegration Under a 38 a Month Cap

The Alaska 1282 break and the FAA production cap #

Alaska Airlines flight 1282 left Portland on 5 January 2024 with 171 passengers and six crew aboard a 737 MAX 9 registered N704AL. At 16,300 feet the left side mid exit door plug separated from the fuselage. The aircraft returned with no fatalities and two minor injuries. The NTSB preliminary report released in February 2024 documented that the four bolts intended to retain the plug were not installed when the aircraft left Renton on 15 December 2023. The fuselage had arrived from Spirit AeroSystems in Wichita with damaged rivets adjacent to the plug, the rework had been opened by Spirit personnel at Renton, and the plug had been removed and reinstalled without the retention bolts being refitted or documented. Boeing's quality management system did not capture the open work item.

The FAA grounded the 171 in service 737 MAX 9 fleet on 6 January 2024. On 24 January 2024 the FAA announced it would not approve any production rate increase on the 737 MAX line above 38 aircraft per month, the program's stated rate at the time. The cap was tied to six Safety and Production Quality Plan milestones covering speak up culture, supplier performance, traveled work elimination, and engineering and quality investments. Permanent FAA inspectors were placed at Renton and at the Spirit 737 build line in Wichita. The FAA Expert Review Panel report mandated by Section 103 of the Aircraft Certification, Safety, and Accountability Act, released 26 February 2024, found Boeing's safety culture inadequate. As of the FAA's 26 March 2026 statement, Boeing had completed five of six SPQP milestones and the agency was auditing for a stepwise increase to 42 a month, then 47, with 50 a month not realistic before late 2026.

The Spirit reabsorption: 4.7 billion dollars and the Airbus carve out #

Boeing announced on 1 July 2024 that it would acquire Spirit AeroSystems Holdings for 37.25 dollars per share in an all stock transaction, an equity value of roughly 4.7 billion dollars and an enterprise value of 8.3 billion including assumption of about 3.6 billion of net debt. Spirit had been spun off from Boeing in 2005 to Onex Partners and had been the sole source of 737 fuselages and major 787 fuselage sections for two decades. The reabsorption logic was that the 2005 separation had created a fixed price interface that incentivized Spirit to push undocumented rework downstream to Boeing, and that traveled work was the structural cause of the Alaska 1282 build failure. Concurrently, Spirit executed a binding term sheet with Airbus to divest the A220 fuselage build at Belfast and Casablanca, the A220 pylon work at Wichita, and the A350 fuselage section work at Saint Nazaire and Kinston, North Carolina. Airbus paid no cash for the assets and received a 559 million dollar payment from Spirit, reflecting the negative value of those programs at the contract terms then in force.

Close dragged. Originally guided to mid 2025, antitrust review in the United States, the United Kingdom CMA, and the European Commission, plus bridge supply agreements with Airbus for Belfast wing components and with the Department of Defense for Spirit's classified work share, pushed close into the fourth quarter of 2025. The transaction completed on 11 December 2025. Spirit's Tulsa facility was retained by Boeing and is being repurposed for 737 and 787 component work. Boeing now owns the entire 737 fuselage value chain end to end for the first time since 2005, and the integration program has set a 1.2 billion dollar run rate cost synergy target by 2028, driven primarily by elimination of inventory buffer between Wichita and Renton and consolidation of quality management systems.

The 53 day strike and the IAM 751 settlement #

Boeing's contract with IAM District 751 expired at 11:59 pm Pacific on 12 September 2024. The first tentative agreement, recommended by union leadership, offered a 25 percent general wage increase compounded over four years and a 3,000 dollar ratification bonus. Members rejected it by 94.6 percent against, and 96 percent voted to authorize a strike. The walkout began at 12:01 am on 13 September 2024 and idled the 737, 767, 777, and 777X final assembly lines at Renton and Everett, the KC-46 Tanker line, and 737 and 777 component fabrication at Auburn. Spirit AeroSystems furloughed roughly 700 workers in Wichita on 21 October 2024 as cumulative undelivered fuselages exceeded storage capacity. A second offer at 30 percent compounded was rejected on 23 October 2024 by 64 percent against. The fourth and final offer, ratified on 4 November 2024 by 59 percent in favor, delivered a 38 percent general wage increase compounded over four years, a 12,000 dollar ratification bonus, a 401(k) match of 100 percent on the first 8 percent of pay, and a commitment to build Boeing's next clean sheet commercial aircraft in the Puget Sound region.

Boeing estimated the strike's revenue impact at roughly 11 billion dollars across the fourth quarter of 2024 and the first quarter of 2025, consistent with the loss of approximately 80 narrowbody deliveries. The Anderson Economic Group put cumulative direct economic cost to workers, employers, and the regional economy at 11.56 billion dollars. The settlement raised Boeing's labor cost base by an estimated 1.1 billion dollars annually at full run rate, a figure recoverable in unit margin only if the 737 line returns to 50 a month by 2027 and 57 a month by 2028. The Puget Sound build commitment locks Boeing into a Washington state workforce strategy at exactly the moment Airbus is expanding A320 final assembly capacity in Mobile, Alabama, and Tianjin.

The cash trajectory and the 787 climb out of Charleston #

Boeing's free cash flow has been negative every year since 2019. The 2024 result, negative 14.3 billion dollars per the Form 10-K, reflected the production cap, the strike, a 6 billion dollar equity raise plus a 5 billion dollar mandatory convertible offering completed in October 2024 to shore up investment grade ratings, and a 1.7 billion dollar Starliner charge after the August 2024 stranding of NASA astronauts Butch Wilmore and Suni Williams. The 2025 result, negative 4.6 billion, was driven by the strike's first quarter overhang, ramp inefficiencies as the 737 line restarted, and 777X certification cost, partially offset by customer pre delivery payments as deliveries resumed. Boeing has guided to free cash flow of zero to plus 2 billion in 2026, with a path back to 8 to 10 billion annually by 2027 contingent on the 737 line reaching 47 a month and the 787 line reaching 7 a month at North Charleston.

The 787 line at North Charleston has been near 5 a month since 2022, well below the 14 a month achieved before the 2020 to 2022 stand down on shimming and fuselage join issues. Boeing has signaled 7 a month by end 2026 and 10 a month by 2028. The 777X is in flight test with a 2027 entry into service target after multiple delays. The 767 freighter line at Everett closes in 2027 after the final freighter, with the KC-46 tanker continuing on the same line. KC-46 cumulative pretax charges exceed 7.6 billion dollars on the original 4.9 billion fixed price contract, T-7A Red Hawk has absorbed more than 1.6 billion in charges, and Starliner more than 1.85 billion.

The DOJ deferred prosecution breach and the July 2024 plea #

The 7 January 2021 deferred prosecution agreement on the two 737 MAX 8 crashes, Lion Air JT610 in October 2018 and Ethiopian ET302 in March 2019, required Boeing to maintain a compliance program for three years in exchange for deferral of a felony conspiracy charge. On 14 May 2024 the Department of Justice notified the Northern District of Texas that Boeing had breached the DPA. On 24 July 2024 the parties filed a plea agreement under which Boeing pleaded guilty to conspiracy to defraud the United States, paid a 487.2 million dollar criminal fine of which 243.6 million was credited to amounts already paid, agreed to invest at least 455 million in compliance and safety over three years, and accepted an independent monitor. On 5 December 2024 Judge Reed O'Connor rejected the plea on grounds related to the monitor selection process. A non prosecution agreement finalized in May 2025 retained the 487.2 million fine, removed the felony plea and monitor, and substituted internal compliance with regulator oversight.

The legal residue is consequential for procurement. Boeing's federal contract eligibility is procedurally protected by the non prosecution structure, but the company is under the most intensive FAA, NTSB, DOT Inspector General, and Senate Commerce scrutiny in its history. Senate Commerce testimony on 17 April 2024 by whistleblower Sam Salehpour on 787 fuselage join issues, and on 18 June 2024 by then chief executive Dave Calhoun, framed the public narrative around manufacturing shortcuts. The April 2024 death of John Barnett, a former quality manager in deposition for retaliation litigation, drew further attention to the 787 supplier culture.

The Airbus parallel and the duopoly arithmetic through 2028 #

Airbus delivered 766 commercial aircraft in 2024, the seventh straight year ahead of Boeing. The result was constrained by CFM LEAP-1A and Pratt PW1100G GTF engine availability, Spirit Belfast wing work, and cabin equipment shortage. Airbus has guided the A320 family rate to 75 a month by 2027, with assembly at Toulouse, Hamburg, Mobile, and Tianjin. Net order intake in 2024 was 826 and backlog reached 8,658 frames. Boeing's commercial backlog stood at 5,521 frames at end 2024 with a 9.6 billion dollar net loss in commercial airplanes. Through 2028 the duopoly arithmetic is an Airbus narrowbody rate of 75 versus a Boeing 737 rate unlikely to exceed 57 on the most aggressive path.

The fleet side reflects the gap. Southwest Airlines slowed 2025 capacity growth and delayed the 737 MAX 7 after engine anti ice certification slipped into 2025 and 2026. United Airlines deferred 277 MAX deliveries into the 2027 to 2029 window. Ryanair, with 210 MAX 8200 frames on order, criticized delivery slippage and added A320neo wet leases for summer 2024 and 2025. Emirates restructured part of its 777X order into 787 frames. The KC-46 fleet must reach operational mission set on schedule for the Air Force to retire the KC-135 by the early 2030s. Starliner is unlikely to return to NASA crew rotation in any meaningful capacity before 2027. For the United States commercial aerospace trade balance, the 2026 question is whether Boeing's narrowbody export run rate can sustain a positive contribution to the goods balance against an Airbus 75 a month base.

Sources #

• NTSB Aviation Investigation Report DCA24MA063, Alaska Airlines flight 1282
• FAA statement on Boeing 737-9 production and 38 a month cap
• FAA Expert Review Panel report, Section 103 Aircraft Certification, Safety, and Accountability Act
• Boeing 2024 Form 10-K, segment results and free cash flow reconciliation
• Boeing announcement of agreement to acquire Spirit AeroSystems, 1 July 2024
• Spirit AeroSystems 2024 Form 10-K and merger proxy
• Airbus binding term sheet for A220 and A350 work transfer from Spirit AeroSystems
• IAM District 751 Boeing contract documents and ratification announcement, November 2024
• Department of Justice plea agreement filed in United States v. Boeing, Northern District of Texas, July 2024
• United States Senate Committee on Commerce, Science, and Transportation, hearings on Boeing safety culture, April and June 2024
• Boeing equity and mandatory convertible offerings, October 2024 prospectus
• Airbus 2024 Universal Registration Document and 2024 commercial aircraft order and delivery report
• Anderson Economic Group estimate of 2024 IAM Boeing strike economic impact
• FAA statement on 737 MAX production rate audit progress, 26 March 2026
• Cirium Ascend Fleets data on 737 MAX deliveries and operator backlog, January 2026 release cited via Reuters
• United States International Trade Commission, civil aircraft trade balance series