Behind the Prop

Bobby Doss, Wally Mulhearn
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Behind the Prop is the Podcast for anyone involved in aviation from general aviation to professional pilots. Our hosts Bobby Doss is the owner of a flight school in Houston, Texas, and Wally Mulhearn is a pilot for a major airline and is also a designated pilot examiner (DPE) based in Houston, Texas. Weekly they tell stories, share lessons and tips from behind the prop. Together they have over 24,400 hours of flight time (Wally has over 24,000 of those) and collectively they provide very unique perspectives on general aviation, airplanes, and all things aviation.

  1. 2 nov

    E206 - The Invisible System Keeping You Alive

    In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn take on the one airplane system that can hurt you while it makes you feel better: cabin heat. Starting from a cold morning climbing out of Hooks with a toasty cabin, a little sleepiness and a headache, they walk through where the warm air really comes from in a Cessna 172, from the wing inlet and the cabin air flap to the shroud around the muffler, and why the heater warms outside air instead of piping exhaust into the cabin. Wally shares the two-paragraph heating and ventilation section from the Piper Tomahawk POH he bought after his first flying lesson in 1981, explains what a good checkride answer sounds like, and makes the case that reading the POH beats repeating what you heard around the flight school. They discuss why a crack hidden inside the shroud is the real concern, how inspections and A&P carbon monoxide checks during run-ups help catch problems, and a 2024 NTSB case in which a Mooney M20E pilot made a forced landing in a field after his two carbon monoxide detectors alerted. The hosts cover headache and drowsiness as warning signs, why an electronic CO monitor beats a spot card that has no alarm, and a simple flow for a suspected CO event: heat off, vents open, point toward the nearest suitable airport, tell ATC, and have a mechanic inspect the airplane even if you start feeling better.

  2. 19 oct

    E205 - I Knew the Rule, The Pilot Who Walked Into a Running Prop

    In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn welcome Samuel Couillard, a propeller strike survivor and human factors speaker from Quebec, Canada. Samuel recounts the events of September 19, 2015, when as a student pilot working toward his commercial certificate and employed as a lineman at the airport, he mistakenly walked into a running propeller after an otherwise routine flight. He describes the ordinary conditions that day, the momentary lapse that led to the incident, and the profound physical and personal changes that followed, including extensive injuries and a lengthy recovery process. The conversation emphasizes human factors in aviation such as complacency after gaining experience, the difference between knowledge and consistent safe behavior, the dangers of fatigue and distraction, and the critical importance of maintaining vigilance even after the flight appears complete. Samuel shares insights from his safety seminars, highlighting how even knowledgeable pilots can make errors when routines change or confidence increases, and he offers practical advice on building personal systems to prevent such mistakes. The hosts discuss passenger briefings, eye contact on the ramp, and the value of creating barriers against complacency to ensure everyone returns home safely. Connect with Samuel Couillard: Website: https://www.samuel-c.com/ Email: info@productionboka.com

  3. 5 oct

    E204 - What does that BLUE KNOB actually do?

    In episode E204 of Behind the Prop, hosts Bobby Doss and Wally Mulhearn dive into the function of the blue knob in constant speed propeller systems. They explain it as the RPM selector that acts like a transmission by changing propeller blade pitch to maintain selected RPMs. The discussion covers fixed pitch versus constant speed props, the role of the governor, engine oil as hydraulic fluid for blade adjustment, manifold pressure management during climbs and descents, and why the POH is the final authority over instructor advice. They address checkride scenarios, common misconceptions like flying squared settings, oil leaks as engine emergencies, and the importance of using proper checklists rather than acronyms like GUMPS. The episode emphasizes understanding the full system for safe and efficient operations in complex aircraft like the Cessna 182T.

  4. 21 sep

    E203 - Ask the DPE - Part II

    In this episode of United Flight Systems, Bobby Doss continues his conversation with DPE Wally Mulhearn in part two of Ask the DPE. They dive deep into what makes an examiner nervous during checkrides, particularly during simulated engine failures and low altitude go-arounds. Wally explains the importance of proper go-around procedures versus touch-and-goes and why examiners avoid the latter on checkrides. The discussion covers the fine line between an ugly maneuver and an unsafe pilot, emphasizing crew resource management and speaking up early. Applicants learn about checklist discipline as a critical factor, the value of accurate but not overly precise calculations like density altitude, and how decision-making skills are tested from the start. Wally shares insights on common failures, pet peeves with scheduling, and best recoveries after mistakes. The episode wraps with lightning round questions and advice for applicants the night before their checkride. Tune in for invaluable tips to succeed on your next checkride.

  5. 7 sep

    E202 - Ask the DPE - Part I

    In this episode of Behind the Prop, Bobby interviews DPE Wally Mulhern in Ask the DPE Part I. They cover what makes an applicant look ready before walking in the door, including flight time reasonableness on the 8710, IACRA applications, solo versus PIC time, and required cross country, night, and instrument time. Wally shares signs that someone was sent too early, such as last-minute urgency and poor planning. They discuss communication preferences like email or text with full details including FTN, paperwork mistakes like missing logged ground school and class totals, dress and appearance expectations, pet peeves including answering the question directly, whether DPEs try to intimidate applicants, the meaning of questions like are you sure about that, open book orals, looking things up, maneuver tolerances per the ACS preamble, asking for breaks, and whether the DPE hopes applicants pass.

  6. 24 ago

    E201 - The First Five Minutes

    Bobby Doss and Wally Mulhearn open the episode by celebrating the milestone of reaching 201 shows and reflecting on listener engagement from Oshkosh and beyond. The main topic focuses on the first five minutes of flight, the phase where workload spikes as pilots manage engine start, avionics, passengers, and clearances before taxi. They stress the importance of sterile cockpit discipline once the engine is running to prevent distractions that can lead to incidents like runway excursions. Wally shares his approach to control checks before engine start and using checklists as verification tools rather than to-do lists. The conversation covers common checkride mistakes such as incomplete taxi readbacks that omit the assigned runway and failing to anticipate instructions by listening to other traffic. During the taxi to run-up phase, they highlight situational awareness in congested areas like the delta ramp at Hooks Airport and the value of positioning to allow space for others. Bobby outlines his three-part mental model of setup, decision point at run-up, and final go/no-go assessment while advocating for finding reasons not to fly rather than reasons to proceed. The takeoff decision includes the fifty-seventy rule for aborting if rotation speed is not achieved halfway down the runway and personal flows like lights, clocks, and fuel. In the initial climb they stress completing the after-takeoff checklist promptly to avoid configuration issues such as forgotten flap retraction. The episode closes with a listener challenge to develop and test a personal first-five-minutes flow along with a candid confession from Wally about once departing with a rudder gust lock still installed.

  7. 10 ago

    E200 - The Flight Before the Flight

    Bobby and Wally open the episode reflecting on recent experiences at Oshkosh, including social media feedback and a memorable interaction with a young aviation enthusiast whose parents are pilots. They then dive into the main topic of Episode 200, The Flight Before the Flight, stressing that most poor decisions occur during pre-flight preparation rather than in the air. The night-before sequence covers weather outlook briefings using multiple apps and 1-800-WX-BRIEF for human insight, verification of aircraft records especially for older experimental planes with modern avionics like G5 systems, fuel planning with extra margins beyond legal minimums, and self-assessment of fitness including illness or medication effects. On the morning of the flight they recommend re-evaluating forecasts against actual conditions observed outside and applying personal minimums that may differ by aircraft type such as the Saratoga versus a tailwheel. The hosts stress making these steps habitual through a simple card system and the PAVE checklist while inviting listener confessions about past decisions, shared personal minimums, and feedback on what they always check the night before. Wally adds insights from international flying on the importance of sleep management. They close by recommending the AOPA VFR personal minimums sheet and an ALPA Air Safety Institute case study called Fair Weather Flyer.

  8. 27 jul

    E199 - The Dirty Dozen

    In this episode of Behind the Prop, hosts Bobby Doss and Wally Mulhearn dive into the Dirty Dozen, a set of twelve human factor traps that can affect pilots and mechanics alike. Originally released by the FAA around 2011 or 2012 as a poster for mechanics, these traps apply equally to pilots and can lead to serious situations if not recognized. The discussion covers everyday traps like complacency and distraction that bite on routine flights, as well as decision-making and awareness issues. Bobby and Wally share personal anecdotes, including stories about fuel checks during checkrides, the dangers of expectation bias, and real-world incidents like the Eastern Airlines Flight 401 crash caused by a distraction over a light bulb. They emphasize how these factors, including fatigue, pressure, lack of communication, and normalization of deviation, can cascade into problems for even experienced aviators. To combat these traps, the hosts offer practical defenses such as setting personal minimums, chair flying, using checklists effectively, and maintaining situational awareness. They stress the importance of being prepared, honest with oneself, and continuously learning to avoid the Swiss cheese model of accidents. Listeners are encouraged to review the Dirty Dozen poster linked in the show notes.

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Behind the Prop is the Podcast for anyone involved in aviation from general aviation to professional pilots. Our hosts Bobby Doss is the owner of a flight school in Houston, Texas, and Wally Mulhearn is a pilot for a major airline and is also a designated pilot examiner (DPE) based in Houston, Texas. Weekly they tell stories, share lessons and tips from behind the prop. Together they have over 24,400 hours of flight time (Wally has over 24,000 of those) and collectively they provide very unique perspectives on general aviation, airplanes, and all things aviation.

Información

  • Creador
    Bobby Doss, Wally Mulhearn
  • Años de actividad
    2020 - 2026
  • Episodios
    212
  • Clasificación
    Apto
  • Copyright
    © 2021 Behind the Prop
  • Mostrar sitio web
    Behind the Prop

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