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Atlas / NTSB / GAA16CA495

NTSB CAROL · Event

Event GAA16CA495

2016-09-19 Grand Isle, Vermont, United States Airport · VT15 None 1 aircraft Status: Completed

Registry · N4681M

FAA Aircraft Registry record.

Make / Model

PIPER PA-11

Year of manufacture

1947 · 69 years old at event

Engine

CONT MOTOR A&C65 SERIES (65 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19551229

ADS-B equipped

Yes — Mode-S A5B9DA

Registrant of record

SCOOTAIR LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to maintain adequate airspeed and his exceedance of the airplane’s critical angle-of-attack during a simulated engine failure and forced landing with a tailwind, which resulted in an aerodynamic stall.

Factual narrative

The pilot of a tailwheel-equipped airplane reported that about 450 feet above the ground, he reduced the power to idle to simulate an engine failure and forced landing. The pilot further reported that he "pushed the nose over" and made a "left tear drop turn" to land on the opposite direction of the takeoff direction. When the pilot had about 15 to 20 degrees remaining in the turn, and was about 15 to 20 feet above the ground, he reported that he increased "back stick pressure" and the airplane entered an aerodynamic stall. Subsequently, the left wing dropped and the airplane impacted terrain in a nose low left wing down attitude. The left wing and fuselage sustained substantial damage. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot reported in the National Transportation Safety Board Pilot/ Operator Aircraft Accident/ Incident Report that he misjudged the wind speed and did not realize he was completing the simulated training maneuver with a tailwind. The accident airport did not have an automated weather observing system or wind indicator. The pilot of a tailwheel-equipped airplane reported that about 450 feet above the ground, he reduced the power to idle to simulate an engine failure and forced landing. The pilot further reported that he "pushed the nose over" and made a "left tear drop turn" to land on the opposite direction of the takeoff direction. When the pilot had about 15 to 20 degrees remaining in the turn, and was about 15 to 20 feet above the ground, he reported that he increased "back stick pressure" and the airplane entered an aerodynamic stall. Subsequently, the left wing dropped and the airplane impacted terrain in a nose low left wing down attitude. The left wing and fuselage sustained substantial damage. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot reported in the National Transportation Safety Board Pilot/ Operator Aircraft Accident/ Incident Report that he misjudged the wind speed and did not realize he was completing the simulated training maneuver with a tailwind. The accident airport did not have an automated weather observing system or wind indicator. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).

  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Angle of attack-Capability exceeded - C
  • Environmental issues-Physical environment-Terrain-(general)-Contributed to outcome
  • Environmental issues-Conditions/weather/phenomena-Wind-Tailwind-Awareness of condition
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Airspeed-Not attained/maintained - C

Verbatim from NTSB's published report. Source file NTSB_2016_GAA16CA495.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall, engine failure). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗