Most Common Oral Exam Topics
Based on reports from pilots who completed their Commercial Multi-Engine checkride, these topics came up most frequently during the oral portion:
- Vmc factors and single-engine aerodynamics
- Multi-engine systems — engines, propellers, and fuel
- Performance calculations and charts
- Weight and balance
- Engine failure procedures and decision-making
- V-speeds and their significance
- Gear systems and emergency extension
- Weather planning and fuel planning
- Lost communications procedures
What to Expect on the Flight
The flight portion of the CMEL checkride is heavily centered on engine failures — expect them at multiple points including takeoff, climb, cruise, and on approach. Several reports describe DPEs pulling an engine during instrument approaches or at other high-workload moments to see how you manage priorities. You'll also be asked to demonstrate stalls (both power-on and power-off), slow flight, steep turns, and various landings. Don't be surprised if the engine failure scenarios feel continuous; the DPE wants to see that you can fly the airplane and run the appropriate checklists without getting tunnel vision.
Checklist management comes up repeatedly as a make-or-break skill. DPEs are watching whether you can identify the failed engine, secure it methodically, and continue flying a stable profile — all without rushing. Multiple reports note that examiners care more about a deliberate, correct response than a fast one. Some DPEs will also work in instrument procedures (approaches, holds) as part of the flight if the checkride includes an instrument component.
DPE styles vary significantly. Some examiners, like Tristan Gibbs, are described as teaching-focused and relaxed, while others like Charles Lilly demand meticulous paperwork and precise performance numbers before you even start the engine. Regardless of style, the universal thread is that they all want to see solid aeronautical decision-making and genuine understanding of single-engine operations — not just rote memorization.
Preparation Tips from Pilots Who Passed
- Know every Vmc factor and be able to explain why each one matters — DPEs across multiple reports dug deep into this topic and expected you to reason through it, not just recite a list.
- Be fluent with your POH: performance charts, weight and balance, and systems diagrams. Multiple examiners tested whether pilots could actually use the book under pressure, not just summarize it.
- Practice engine failure identification and the secure-the-engine flow until it's second nature. Reports consistently say DPEs will fail an engine at the worst possible moment — on approach, on takeoff, during configuration changes.
- Use correct terminology: say 'propeller windmilling' not 'engine windmilling.' At least one examiner specifically noted this distinction and it reflects the precision they're looking for.
- Have your paperwork and flight planning buttoned up before you walk in. One DPE is known to send people home over incomplete or sloppy documentation.
- Don't rush single-engine procedures. Multiple reports emphasize that a deliberate, methodical response is valued far more than speed. Fly the airplane first, then work the problem.
- Prepare for scenario-based oral questions, not just flashcard-style Q&A. Examiners asked about V1 decision-making, lost comms scenarios, and 'what would you do if...' situations that require real judgment.
- Review your specific DPE's gouge if available — examiner tendencies vary widely from teaching-oriented to very strict on standards, and knowing what to expect can help you manage stress on the day.
Frequently Asked Questions
Very deep. Across multiple reports, Vmc factors were the single most commonly tested oral topic. Expect to explain each factor that affects Vmc, why the critical engine matters, and how things like bank angle, weight, and density altitude change the picture. Rote memorization won't cut it — they want you to reason through scenarios.
Reports describe engine failures at virtually every phase: takeoff, climb, cruise, and on approach — including instrument approaches. The failures are meant to be realistic and often come at high-workload moments. The DPE is evaluating your identification, checklist discipline, and ability to keep flying the airplane safely throughout.
Know them cold. Gear systems, propeller systems, fuel system, and emergency procedures came up repeatedly. Multiple DPEs asked detailed questions about how systems work and what you'd do if they failed. Being able to reference and use your POH quickly is just as important as having the knowledge in your head.
Decision-making. Several reports note that DPEs reward competence and good judgment over flawless execution. That said, you still need to meet ACS standards. The consistent message is: be methodical, don't rush, and show the examiner you understand the 'why' behind every procedure.
Very important — at least two reports highlight DPEs who spent significant oral time on weight and balance and performance charts. Come prepared to calculate takeoff and landing distances, accelerate-stop distance, and single-engine climb performance for the actual conditions of your checkride day.
Know your examiner before you walk in
Every DPE has patterns. Get a personalized brief based on reports from pilots who tested with your examiner.
Get your free DPE brief → Browse gougesContent generated from 9 pilot gouges in the Gouge Hub database. Updated periodically as new reports are submitted.