Airworthiness Directives, Designees & the PMA Crisis: A Candid Look at GA Regulation with Jimmy Tubbs

Airworthiness Directives, Designees & the PMA Crisis: A Candid Look at GA Regulation with Jimmy Tubbs

In this return appearance on Aviation Masters, Mike Busch sits down again with legendary aeronautical engineer Jimmy Tubbs for a deep, technically rich conversation about the regulatory machinery that shapes general aviation. From the flawed criteria behind Airworthiness Directives to the erosion of Designated Engineering Representatives, and from PMA approval delays to the disappearance of the Small Airplane Directorate's collaborative processes, Jimmy pulls back the curtain on how the system is supposed to work, where it breaks down, and what it costs aircraft owners and the GA community. This is a candid, experience-driven conversation with one of the most knowledgeable engineers in piston aviation — essential listening for anyone who owns, operates, or maintains a GA aircraft. ⏱ Chapters 00:00 – Introduction & Jimmy's Background 03:00 – What Is an Airworthiness Directive & How Are They Triggered? 07:00 – The Two-Variable Framework: Frequency vs. Severity of Failure 11:00 – Why AD Analysis in GA Lacks Formal Criteria 17:00 – FAA Reorganization: The Loss of Directorates & Senior Engineers 21:00 – The ECI Cylinder AD: Head-to-Barrel Separations & Overreach 28:00 – Corrective Actions That Ignore Supply Chain Reality 31:00 – Short-Wing Piper Rudder AD & the Vintage Aircraft Association Fight 36:00 – Cessna 402 vs. 414 Spar Strap AD: When Scope Goes Too Far 41:00 – What Is an AMOC & How Can It Help Aircraft Owners? 43:00 – The Global AMOC: Continental's V-Band Clamp Solution 47:00 – The Airworthiness Concern Sheet: A Better Way That's Now Gone 53:00 – Twin Cessna Exhaust AD: How Industry Input Saved the Fleet 57:00 – DERs, ODAs & the 2025 Policy Shift Affecting Designee 1:05:00 – The PMA Approval Process: Slower & More Cumbersome Than Ever  1:10:00 – Why PMA Parts Are the Lifeline for Aging GA Aircraft  1:19:00 – The NORSEE Process: A Rare Bright Spot in FAA Approvals  1:22:00 – The Need for Young Engineers & the Future of the Aging Fleet  1:27:00 – Final Thoughts: Lobbying for a Better AD Process 📍 Subscribe to Aviation Masters for more long-form conversations with the people shaping the future of GA.

The Future of Flight Safety: Automation, Training & Hard-Won Lessons with Bruce Landsberg

In this episode of Aviation Masters, Mike Busch sits down with Bruce Landsberg—former NTSB Vice Chairman, longtime president of the AOPA Air Safety Institute, and author of the new book Learning from Icarus—for an extraordinary conversation spanning nearly 50 years of aviation safety experience. From his early days as a Cessna demo pilot to pioneering simulator training at FlightSafety, leading accident investigations at the NTSB, and analyzing the future of automation in aviation, Bruce shares hard-won insights that every pilot, owner, and aviation professional needs to hear.  This episode covers single-engine emergencies in twins, the value of realistic training, accident investigation philosophy, weather-related crashes, the promise and pitfalls of automation, and why learning from past mistakes is the key to staying alive in aviation. ⏱ Chapters 00:00 – Introduction: 40 Years of Friendship & Aviation Safety 03:00 – The Reality Check: Twin Engine Failures in the Simulator vs. Real Life 08:00 – Growing Up in Washington DC & Getting Into Aviation 12:00 – Vietnam, Air Force ROTC & Learning to Fly at College Park 18:00 – From Psychology Major to Professional Pilot 23:00 – Cessna Aircraft Company & Selling Fleets to Flight Schools 28:00 – The 310 Demo Flight That Changed Everything 35:00 – Moving to FlightSafety & The Revolution in Simulator Training 42:00 – Why Simulators Teach What Aircraft Can't 48:00 – Transitioning to AOPA & The Air Safety Foundation 55:00 – Building the ASI: Philosophy, Programs & Outreach 1:02:00 – JFK Jr.'s Fatal Crash: What Really Happened 1:09:00 – Spatial Disorientation, VFR Into IMC & The "What Was He Thinking?" Question 1:17:00 – Joining the NTSB: From Advocacy to Investigation 1:25:00 – Inside NTSB Accident Investigations: Process, Politics & Public Perception 1:33:00 – The Colgan 3407 Crash: Fatigue, Training & Industry Change 1:42:00 – Weather Accidents: Why Smart Pilots Still Fly Into Storms 1:49:00 – Icing, Convective Weather & The Role of Get-There-Itis 1:56:00 – Automation in Aviation: The Good, The Bad & The Ugly 2:03:00 – Tesla Autopilot, AI & What Aviation Can Learn from Automotive 2:09:00 – The Future: Flight Data Monitoring for GA Aircraft 2:15:00 – Learning from Icarus: Writing the Book & Key Takeaways 2:21:00 – Where to Get the Book & Final Thoughts 📍 Subscribe to Aviation Masters for more long-form conversations with the people shaping the future of GA. 🔗 RESOURCES MENTIONED IN THIS EPISODE * Bruce Landsberg's Book: Learning from Icarus – https://learningfromicarus.com/ [https://learningfromicarus.com/] * Email: learningfromicarus@gmail.com [learningfromicarus@gmail.com] * Books by Mike Busch: https://www.savvyaviation.com/resources/#books [https://www.savvyaviation.com/resources/#books]

How Artificial Intelligence Will Transform Aviation with John Sipple

In this episode of Aviation Masters, Mike Busch sits down with Dr. John Sipple — machine learning professor at George Washington University, former Boeing Phantom Works engineer, Google AI veteran, and Diamond DA40 owner — for one of the most forward-looking conversations in the show's history. From tracking ballistic missiles with Kalman filters to training neural networks at Google to building AI-powered diagnostics for GA aircraft, John brings a uniquely deep and practical perspective on where artificial intelligence is headed in aviation. The conversation covers everything from how to certify ML models with the FAA, to why technicians struggle with troubleshooting, to the Diamond DA40 oil pressure failures that inspired John to found Vyzerion AI. If you own, maintain, or fly a piston aircraft, and especially if you've ever wondered what AI can actually do for GA safety, this episode is essential listening. ⏱ Chapters 00:49 – Introducing Dr. John Sipple 05:30 – Boeing Phantom Works: Missile Tracking & Kalman Filters 09:30 – From Big Data to Machine Learning: The Career Pivot 11:45 – AI vs. Machine Learning vs. Deep Learning: Defining the Terms 14:00 – How Neural Networks Work & Why 2012 Was a Turning Point 18:00 – Applying ML to Telemetry: From Missiles to Aircraft Engines 26:00 – What Is Explainable AI (XAI) and Why It Matters in Aviation 36:00 – Anomaly Detection in Piston Engines: How It Works 47:00 – Project Spark: Savvy Aviation's AI Diagnostics Initiative 53:00 – Training vs. Inference: Why the FAA Draws a Hard Line 55:00 – How You Certify an ML Model for Aircraft Use 59:00 – Why Tesla FSD Couldn't Happen in Certificated Aviation 1:00:00 – Experimental Aircraft as the Path to AI in the Cockpit 1:05:00 – Three Lines of Defense for AI in Mission-Critical Systems 1:09:00 – The Vision for Self-Diagnosing Airplanes 1:13:00 – Why Mechanics Struggle with Troubleshooting (And How AI Fixes It) 1:18:00 – Project Squawk: Training an LLM on Aviation Maintenance Data 1:19:00 – The Data Funnel: Small Models → Explainability → LLM Reasoning 1:24:00 – The Cadillac Index & Why GA Affordability Is Getting Worse 1:25:00 – Autonomous Aircraft vs. Autonomous Cars: Why Is GA So Far Behind? 1:27:00 – Vyzerion AI: Smarter Diagnostics, Healthier Aircraft, Safer Flying 1:28:00 – The Diamond DA40 Service Bulletin & In-Flight Oil Pressure Failures 1:35:00 – Broader AI Fears, Regulation & the Elevator Analogy 1:48:00 – Multimodal AI & the Future of Richer Diagnostics 1:49:00 – Using LLMs to Query the NTSB Accident Database 1:51:00 – Annual Inspections: Are They Helping or Hurting Safety? 📍 Subscribe to Aviation Masters for more long-form conversations with the people shaping the future of GA. 🔗 RESOURCES MENTIONED IN THIS EPISODE Vyzerion AI  —https://vyzerionai.com/ [https://vyzerionai.com/] Savvy Aviation — https://savvyaviation.comsavvyaviation.com [http://savvyaviation.com] NTSB Aviation Accident Database - https://carol.ntsb.gov/ [https://carol.ntsb.gov/]

The Future of General Aviation with George Braly

In this in-depth episode of Aviation Masters, Mike Busch sits down again with George Braly to tackle some of the most urgent issues facing general aviation today. From aging aircraft fuel system failures to the FAA’s draft unleaded fuel transition plan, and from certification gridlock to PMA delays, this episode dives deep into what aircraft owners, mechanics, and industry leaders need to understand right now. If you own, maintain, or operate piston aircraft — this conversation affects you. ⏱ Chapters 03:00 – Elastomers, O-Rings & Why Old Seals Are Causing Fires 07:00 – Upgrading to Modern FKM (Fluorosilicone) O-Rings 11:30 – Why Fuel Leaks Don’t Always Show Up During Inspections 18:00 – FAA Draft Plan to Transition to Unleaded Avgas 21:00 – The Risks of Modifying Engines for Lower-Octane Fuel 26:00 – How Retarded Timing Impacts Horsepower & Twin Safety 33:00 – Is There Already a True Drop-In Replacement for 100LL? 41:00 – FAA Reorganization: Why Certification Is Slower Than Ever 48:00 – DERs, ODAs & Why Delegation Keeps Aviation Alive 57:00 – PMA Parts, OEM Shutdowns & The Parts Supply Crisis 1:04:00 – Is Certification Still Worth the Cost? 1:08:00 – What Aircraft Owners Should Do Now 📍 Subscribe to Aviation Masters for more long-form conversations with the people shaping the future of GA.

Six Decades of Aviation Engineering with Jimmy Tubbs

In this episode of Aviation Masters, Mike Busch sits down with legendary aeronautical engineer Jimmy Tubbs for a deep, wide-ranging conversation that spans more than six decades of aviation experience. From military engineering and piston engine innovation to PMA certification battles and the future of autonomous flight, this episode is a masterclass in how general aviation has evolved and where it may be headed next. Jimmy shares the untold engineering stories behind cylinder design, chrome vs. nickel processes, engine certification challenges, and the hard lessons learned while building some of the most influential piston engine components in modern aviation. This is a candid, technical, and deeply human conversation with one of the quiet architects of how we fly today. ⏱ Chapters  03:00 – From Small-Town Texas to Aeronautical Engineering 07:00 – Military Aviation, Engineering Labs & Learning to Fly 12:00 – Inside ECI: Cylinder Reconditioning & Early PMA Work 17:00 – Channel Chrome vs. Nickel Cylinders: What Really Matters 27:00 – Building New Cylinders & The Birth of Titan Engines 36:00 – TBO, On-Condition Maintenance & FAA Certification Reality 42:00 – The Titan Cylinder AD: What Actually Happened 53:00 – Engine Monitoring, CHT Management & Pilot Responsibility 01:05:00 – Life After ECI: PMA Consulting & Supply Chain Challenges 01:19:00 – Diesel Engines, Automation & The Future of General Aviation 01:30:00 – Final Reflections on Innovation, Aging Aircraft & Passion for Aviation 📍 Subscribe to Aviation Masters for more long-form conversations with the people shaping the future of GA.