Skip to content

Atlas / NTSB / GAA16CA252

NTSB CAROL · Event

Event GAA16CA252

2016-05-18 Nikolai Creek, Alaska, United States None 1 aircraft Status: Completed

Registry · N5589H

FAA Aircraft Registry record.

Make / Model

PIPER PA-20

Year of manufacture

1951 · 65 years old at event

Engine

LYCOMING 0-290 SERIES (140 hp)

Seats / Engines

4 seats · 1 engine

Last airworthiness date

19580213

ADS-B equipped

Yes — Mode-S A720BE

Registrant of record

ADAMS TREVOR J

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's selection of an unsuitable takeoff area resulting in an airplane nose over during the takeoff roll.

Factual narrative

According to the pilot of the tailwheel-equipped airplane, he took off from grassy, wet, down sloping terrain. He recalled that he walked the area of intended takeoff and found no obstacles that would prevented a safe takeoff. However, he reported that during the takeoff roll, he kept the airplane tailwheel off of the ground, while rolling down slope, and the airplane main landing gear wheels rolled over a patch of mud creating a pivot point, and the airplane nosed over. The airplane sustained substantial damage to the vertical stabilizer, rudder, and wing struts. The pilot reported that there were not any mechanical malfunctions or anomalies with any portion of the airplane, prior to the takeoff roll that would have precluded normal flight operations. According to the pilot of the tailwheel landing gear-equipped airplane, he took off from grassy, wet, down sloping terrain. He recalled that he walked the area of intended takeoff and found no obstacles that would prevented a safe takeoff. However, he reported that during the takeoff roll, he kept the airplane tailwheel off of the ground, while rolling down slope, and the airplane main landing gear wheels rolled over a patch of mud creating a pivot point, and the airplane nosed over. The airplane sustained substantial damage to the vertical stabilizer, rudder, and wing struts. The pilot reported that there were not any mechanical malfunctions or anomalies with any portion of the airplane, prior to the takeoff roll that would have precluded normal flight operations. 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 Environmental issues-Physical environment-Runway/land/takeoff/taxi surface-Wet surface-Effect on equipment - C
  • C Environmental issues-Physical environment-Terrain-Wet/muddy terrain-Decision related to condition - C
  • C Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Pilot - C

Verbatim from NTSB's published report. Source file NTSB_2016_GAA16CA252.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.