✈️ Aviation Brief — Issue #9
Weekly insights for student pilots and the instructors who train them.
THIS WEEK'S TOPIC
PA.V.C — Power-On Stalls (Private Pilot ACS)
### 1. ACS STANDARDS SUMMARY
For Private Pilot (PA.V.C.1), the ACS requires you to demonstrate knowledge of stall characteristics, recognition cues (like buffeting or stall horn), and recovery procedures (full power, pitch to break stall, coordinated wings level). Risk management includes identifying hazards like secondary stalls or spins from uncoordinated flight.
In skills (PA.V.C.1), the examiner expects you to: establish clean configuration (flaps up), set takeoff power, maintain coordinated straight flight, slow to stall speed using pitch and power, recognize the stall (e.g., nose drop or wing drop), recover promptly by adding full power (if not already), reducing angle of attack (nose low), retracting flaps/leveling wings with coordinated controls, and return to straight-and-level flight with minimal altitude loss. Altitude tolerance is ±100 feet, airspeed ±10 knots, heading ±10°.
### 2. THREE COMMON STUDENT MISTAKES
- **Uncoordinated flight during entry**: Students often let the ball slip or skid by overusing rudder or aileron, which can lead to a wing drop and spin entry—examiners watch for this closely.
- **Delayed or improper recovery**: Holding back pressure too long after the stall breaks, or forgetting to add full power immediately, resulting in excessive altitude loss (more than 200 feet) or a secondary stall.
- **Poor airspeed control on entry**: Chopping power abruptly instead of gradually reducing it while pitching up smoothly, causing the stall to happen too fast or overspeeding initially.
### 3. CFI PRO TIP
Practice "power-on stall horn drills" at altitude: from straight-and-level, add full power, pitch for Vy, then gradually pull back to hold the stall horn steady for 3 seconds before stalling— this builds the feel for the higher pitch attitude (10-15° nose-up vs. power-off) and ensures smooth coordination without abrupt inputs. Students nail checkrides when they own that horn as their primary cue.
### 4. SAFETY SPOTLIGHT
Power-on stalls mimic real-world departure scenarios, like aggressive climbs or go-arounds with full power. NTSB data (e.g., 2022 stats) shows stalls during initial climb account for ~15% of fatal GA accidents, often from pilot distraction (e.g., turning too steeply post-takeoff) leading to wing drops and spins. A classic ASRS report pattern: overloaded short-field takeoffs where pilots pull too hard, stall uncoordinated, and crash—always prioritize coordinated flight and positive exchange of controls.
### 5. DID YOU KNOW
Power-on stalls happen at a higher nose-up pitch attitude than power-off stalls because the prop wash blankets the wing root with extra airflow, delaying the critical angle of attack. This is why takeoff configurations demand extra vigilance to avoid the "accelerated stall" trap during climbs.
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