Samwise Aeronautical Mechanics
Monday, June 8, 2026
Boeing 777-9 Clears Final Major TIA Gate With Phase 4B FAA Authorization
Boeing’s 777-9 has cleared a major certification gate after the FAA granted Type Inspection Authorization Phase 4B — the largest remaining tranche of regulatory flight testing for the long-delayed widebody. Boeing Commercial Airplanes CEO Stephanie Pope disclosed the milestone at the IATA AGM in Rio de Janeiro on June 6. Phase 4B, the last of five TIA phases, focuses on avionics, stability and control, and human factors, with FAA personnel directly participating in testing. “It enables further avionics and stability and control testing, as well as human factors flight testing,” Pope said. Boeing maintains that deliveries remain on track for 2027.
Sources: Leeham News
NASA X-59 Achieves First Supersonic Flight at Mach 1.1 Above Edwards Air Force Base
NASA’s X-59 quiet supersonic research aircraft completed its first supersonic flight on June 5, reaching Mach 1.1 (713 mph) at 43,400 feet above Edwards Air Force Base, California. NASA test pilot Jim “Clue” Less flew the milestone sortie in support of the agency’s Quesst mission, which aims to demonstrate that commercial supersonic overland flight can be achieved without generating objectionable sonic booms. The aircraft is expected to next fly at its “mission conditions” speed of Mach 1.4 (925 mph) at approximately 55,000 feet. NASA will share acoustic data from community overflight tests with U.S. and international regulators to inform new supersonic noise standards.
Sources: NASA
Walsh Calls on Engine OEMs to Stop “Gouging” Airlines in Final IATA Address
Outgoing IATA Director General Willie Walsh used his final address to the association’s annual general meeting in Rio de Janeiro to issue a blunt warning to engine OEMs. Speaking on June 7, Walsh told manufacturers to “stop gouging us and get back to making great engines that work and that last.” Walsh said the word “gouging” was a “toned down” version of what he had originally intended, and accused engine makers of “doing extremely well while inflicting significant financial pain on the industry.” He warned that allowing engine reliability failures to persist into the next decade is “totally unacceptable.”
Sources: FlightGlobal
Rolls-Royce Trent XWB-84 EP Delivers 1.8% Fuel-Burn Saving — Nearly Double Original Target
Rolls-Royce’s Trent XWB-84 Enhanced Performance engine has delivered nearly double its projected fuel-burn saving one year into commercial service. Data from 34 in-service EP powerplants show an average fuel-burn improvement of 1.8%, versus the 1% saving Rolls-Royce forecast at entry into service. The company says that translates to approximately $450,000 in annual savings per aircraft, or around $9 million across a 20-aircraft A350-900 fleet. Delta Air Lines, Singapore Airlines, and Turkish Airlines currently operate the XWB-84 EP, which entered service in May 2025. The performance data were disclosed by Rolls-Royce on June 4.
Sources: FlightGlobal
SIA Engineering and Safran Form Singapore Joint Venture for Leap-1A and Leap-1B MRO
SIA Engineering Company (SIAEC) and Safran Aircraft Engines announced on June 8 the creation of a Singapore-based joint venture for full MRO of CFM International’s Leap-1A and Leap-1B turbofans. Safran holds 51%; SIAEC retains 49%. The deal builds on SIAEC’s existing quick-turn Leap capability and formalizes a November 2025 letter of intent. The Leap-1A powers Airbus A320neo-family aircraft; the Leap-1B powers the Boeing 737 MAX. SIAEC stated the new entity will “expand engine shop visit capacity as well as give rise to a broader and deeper scope of service” as global Leap fleet size grows.
Sources: FlightGlobal
Aer Lingus Deploys AI Maintenance-Planning Platform Across A320 Fleet
Aer Lingus is rolling out an artificial intelligence platform to automate aircraft maintenance planning, becoming the first airline to deploy AISmartPlan, developed by Sydney-based startup Redback Software. The system consolidates flight schedules, aircraft availability, and workforce constraints to generate optimized maintenance programs. Redback joined International Airlines Group’s IAGi accelerator in 2025, completing a three-month live trial with Aer Lingus that advanced the platform from proof of concept to working solution. AISmartPlan is currently active on CFM International CFM56-5B engines powering Aer Lingus’s Airbus A320 fleet; IAG expects other group airlines to adopt the system before year-end.
Sources: Aviation Week
Pressurization Era Forced Fatigue Rethink: From Safe Life to Fail Safe Design
Airframe structure fatigue emerged as a defining engineering challenge with the introduction of pressurized commercial airliners, Bjorn Fehrm writes in a June 5 analysis for Leeham News. The piece traces how the De Havilland Comet disasters forced a fundamental rethink: the “Safe Life” design philosophy proved inadequate once reliable component lifetime estimation became difficult. The “Fail Safe” alternative routes structural loads through redundant paths so that a single fracture does not lead to catastrophic failure. Work on high-strength 7000-series aluminum alloys for earlier-generation aircraft also exposed significant fatigue shortcomings in service, the analysis notes.
Sources: Leeham News
Curated by JD · samwise.agency