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Atlas / NTSB / GAA15CA011

NTSB CAROL · Event

Event GAA15CA011

2015-03-16 Boulder, Colorado, United States Airport · KBDU None 1 aircraft Status: Completed

Registry · N4785F

FAA Aircraft Registry record.

Make / Model

PIPER PA-18-150

Year of manufacture

1962 · 53 years old at event

Engine

LYCOMING O&VO-360 SER (180 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19760317

ADS-B equipped

Yes — Mode-S A5E1DF

Registrant of record

SOARING SOCIETY OF BOULDER INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's loss of directional control during a bounced landing, which resulted in a runway excursion.

Factual narrative

While conducting a flight to practice landings in a tailwheel equipped airplane, the pilot made an approach to the runway. During the landing, the airplane touched down on the runway and bounced. The pilot attempted to regain control of the airplane as it touched down several times. The airplane exited the right side of the runway onto the grass and the left wing struck an embankment. A postaccident examination revealed the airplane sustained substantial damage to the left wing and aileron. The pilot reported no mechanical malfunctions or failures with the airplane prior to the accident that would have precluded normal operation of the airplane. While conducting a flight to practice landings in a tailwheel equipped airplane, the pilot made an approach to the runway. During the landing, the airplane touched down on the runway and bounced. The pilot attempted to regain control of the airplane as it touched down several times. The airplane exited the right side of the runway onto the grass and the left wing struck an embankment. A postaccident examination revealed the airplane sustained substantial damage to the left wing and aileron. The pilot reported no mechanical malfunctions or failures with the airplane prior to the accident that would have precluded normal operation of the airplane. 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-Directional control-Not attained/maintained - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Landing flare-Incorrect use/operation - C

Verbatim from NTSB's published report. Source file NTSB_2015_GAA15CA011.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 (runway excursion). 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 ↗