Rephonic
Artwork for Warning Bells
Boeing
Ring Laser Gyro
GG1320
Air India 171
Boeing 737 MAX
Certification
Honeywell
Safety Management System
FAA
Max 737
MCAS
Benchmark Electronics
Ram Air Turbine
Lithium Battery
Electrical System
737 MAX

In June of 2018, warning bells went off for Ed Pierson, a Senior Manager at Boeing's 737 Factory. The production environment he helped oversee was becoming increasingly chaotic, leading to worrisome lapses in quality and safety. Months later, when two Boeing 737 MAX aircraft crashed in separate incidents, killing over 300 people, Pierson took action as a whistleblower, determined to shed light on ... more

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Artwork for Warning Bells

Latest Episodes

(Part 2 of 2) When 260 people died aboard Air India Flight 171 and on the ground, the world was given a simple explanation—but what if it’s not only wrong, but a deliberate effort to deflect the truth? In this two-part episode, Ed and Joe are joined ... more

(Part 1 of 2) When 260 people died aboard Air India Flight 171 and on the ground, the world was given a simple explanation—but what if it’s not only wrong, but a deliberate effort to deflect the truth? In this two-part episode, Ed and Joe are joined ... more

On June 12, 2025, Air India Flight 171—a Boeing 787-8—went down just moments after takeoff. Within weeks, a preliminary report pointed the finger at the pilots, citing fuel cutoff switches that allegedly "transitioned" from run to cutoff. Case closed... more

Join Ed and Joe on Warning Bells as they welcome Charles Hoefer for a chilling deep dive into a case that ties a brand-new RV factory to the illicit production of critical flight components, reveals troubling government inaction, and raises urgent qu... more

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Recent Guests

Rachel Chitra
Investigative journalist from India
Foundation for Aviation Safety
Episode: Episode 32 Part I: Air India 171 Crash Investigation - International Cover-up?
Jeremy John Thompson
Electrical engineering expert
Independent consultant
Episode: Episode 32 Part I: Air India 171 Crash Investigation - International Cover-up?
Joe Jacobson
Researcher/analyst with aviation focus
Foundation for Aviation Safety
Episode: Episode 32 Part I: Air India 171 Crash Investigation - International Cover-up?
Jeremy Thompson
Aviation safety expert with electrical analysis background
Independent safety analyst/aviation engineer
Episode: Episode 31: Buried Signals - Following the Data When the Official Story Falls Apart
Charles Hoefer
RV manufacturer and safety whistleblower, focused on aviation safety and GG1320 parts
Hoefer Group (RV manufacturing)
Episode: Episode 30: A Small Town, A Global Aviation Risk
Bob Stoney
Consultant test pilot with 49 years of aviation experience; FAA test pilot; involved in 737 MAX return-to-service project
FAA
Episode: Episode 29: Have 737 MAX Lessons Been Learned?
Randy Klatt
Flight safety officer at the Foundation for Aviation Safety
Foundation for Aviation Safety
Episode: Episode 28: Leadership, Integrity, and Transparency
Juan Browne
Aviaton safety analyst and former pilot known for deep-dive accident analysis
Blancolirio (Juan Browne channel)
Episode: Episode 27: Why Transparency Matters – Aviation Investigations, Accountability, and Safety
Petter Hörnfeldt
Mentour Pilot
Mentour Pilot
Episode: Episode 26: Perspectives from the Flight Deck – A Conversation With Mentour Pilot

Host

Ed Pierson
Host of Warning Bells; safety advocate with extensive Boeing safety experience and whistleblower background; linked to industry safety discussions and independent investigations.

Reviews

4.9 out of 5 stars from 53 ratings
  • Let Guest Talk Please

    Guys, please let your guest talk more. I'm a big fan of Petter and I was hoping to hear him do most of the talking. It was frustrating to hear the hosts dominate with their agenda rather than pick the brain of an extraordinary guest. I am a 40 year military and major airline pilot and I know that Petter has a lot to offer. Please consider changing your style and please let interesting guests talk.

    Apple Podcasts
    2
    High G Flyer
    United Statesa year ago
  • Excellent and Informative

    So grateful to Ed Pierson and the other people in this podcast for telling the truth about what’s really going on inside the aviation industry.

    The amount of misinformation and out and out lies told by senior Management At Boeing is frightening.

    I do wish some of them would be held personally accountable for what happened in the two max 8 tragedies.

    My sincere condolences to all of the families who lost loved ones and friends in those tragedies - they should never have happened.

    Apple Podcasts
    5
    horseygirl2222
    United Statesa year ago
  • This is unbelievable

    All the facts but nothing is being done.

    How about The FAA hires Ed to supervise Boeing.

    Apple Podcasts
    5
    Kaneyboy12121312
    Canada2 years ago
  • Super interesting podcast

    If you have an interest in aviation this is a fantastic podcast to familiarize yourself with the 737max debacle.

    Apple Podcasts
    5
    Farmermac
    United States2 years ago
  • Ed is a Champion of Humanity

    Ed Pierson unselfishly put his career aside to testify, before the Congress, against his former employer, Boeing.

    Ed felt a need to speak about the 737 MAX defects and the escalating profit-pushing culture within Boeing, not because he lost a loved one in the 737 MAX crashes, but because humanity is at the core of his whole being.

    What he has done, and continues to do, for the family of the 737 MAX crashes, for the public, is beyond commendable:

    Ed is simply Champion for Humanity, and this po... more

    Apple Podcasts
    5
    Njoroge P
    Canada3 years ago

Listeners Say

Key themes from listener reviews, highlighting what works and what could be improved about the show.

Regularly lauded for challenging industry narratives and pursuing transparency in investigations.
Guests praised for expertise and candid discussions, though some note hosts could give guests more speaking time.
Engaging, data-driven exploration of aviation safety with strong technical depth.

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Talking Points

Recent interactions between the hosts and their guests.

Episode 28: Leadership, Integrity, and Transparency
Q: Why is timely and transparent information release critical in investigations like Air India 171?
Because it reduces speculation, builds trust, informs policy decisions, and helps the public understand the root causes so that corrective actions can be taken.
Episode 28: Leadership, Integrity, and Transparency
Q: What are the core leadership traits that matter most in accident investigations?
Respect, active listening, integrity, and the willingness to admit mistakes are the foundation, followed by humility and a focus on serving the team rather than exercising rank; these traits help crews and investigators pursue the truth.
Episode 29: Have 737 MAX Lessons Been Learned?
Q: Could you just describe what does an FAA test pilot actually do?
A test pilot is part of a larger engineering team focused on validating that an aircraft meets regulatory requirements, with emphasis on the certification plan, risk management, thorough testing, and clear communication of results to show compliance rather than just performing maneuvers.
Episode 30: A Small Town, A Global Aviation Risk
Q: What has been the impact of these revelations on your business and your personal safety, and what keeps you going to expose this story?
The guest highlights severe retaliation, financial attacks, and threats while underscoring the importance of aviation safety and accountability, noting that continuing to disclose information, despite personal risk, is essential to protect the public and industry integrity.
Episode 30: A Small Town, A Global Aviation Risk
Q: What should the FAA do when confronted with reports of critical avionic parts potentially failing or being misused in the supply chain?
Joe explains that the FAA should identify bogus parts, trace serial numbers, and remove affected units from airplanes, potentially issuing an airworthiness directive or targeted serial-number-based recalls to mitigate risk.

Audience Metrics

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Frequently Asked Questions About Warning Bells

What is Warning Bells about and what kind of topics does it cover?

A deep-dive aviation safety show that examines high-profile crashes and systemic issues in investigations, certification, and safety culture. Across episodes, the discussion often centers on electrical and avionics design flaws, regulatory processes, data transparency, and the influence of industry priorities on public narratives. Notable strengths include rigorous technical analysis from engineers and journalists, a willingness to challenge official narratives, and a clear emphasis on independent, data-driven scrutiny. The show frequently features whistleblowers, safety advocates, and seasoned pilots, offering practical lessons for policy makers, manufacturers, and operators while keeping the focus on passenger safety and accountability.

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Which podcasts are similar to Warning Bells?

These podcasts share a similar audience with Warning Bells:

1. Casefile True Crime
2. American Scandal
3. The Case Of
4. SpyTalk
5. The NPR Politics Podcast

How many episodes of Warning Bells are there?

Warning Bells launched 4 years ago and published 36 episodes to date. You can find more information about this podcast including rankings, audience demographics and engagement in our podcast database.

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What guests have appeared on Warning Bells?

Recent guests on Warning Bells include:

1. Rachel Chitra
2. Jeremy John Thompson
3. Joe Jacobson
4. Jeremy Thompson
5. Charles Hoefer
6. Bob Stoney
7. Randy Klatt
8. Juan Browne

To view more recent guests and their details, simply upgrade your Rephonic account. You'll also get access to a typical guest profile to help you decide if the show is worth pitching.

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