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Atlas / NTSB / WPR20CA058

NTSB CAROL · Event

Event WPR20CA058

2019-11-25 San Diego, California, United States Airport · MYF None 1 aircraft Status: Completed

Registry · N9510E

FAA Aircraft Registry record.

Make / Model

AERONCA 11AC

Year of manufacture

1946 · 73 years old at event

Engine

CONT MOTOR A&C65 SERIES (65 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19550820

ADS-B equipped

Yes — Mode-S AD3ABB

Registrant of record

SNOOPY AIR LLC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot's failure to maintain directional control during the landing roll with a quartering tailwind, which resulted in a collision with an airport sign and subsequent ground-loop.

Factual narrative

The pilot reported that due to a quartering tailwind, he conducted a wheel landing in the tailwheel equipped airplane. Shortly after touchdown, the airplane was pushed toward the left side of the runway. The pilot attempted to realign the airplane with full right rudder and power to correct the drift, but to no avail. The airplane subsequently struck a sign along the edge of the runway and ground looped, substantially damaging the aft fuselage. The pilot reported that there were no mechanical failures or malfunctions that would have precluded normal operation. The pilot reported that, due to a quartering tailwind, he conducted a wheel landing in the tailwheel-equipped airplane. Shortly after touchdown, the airplane was pushed toward the left side of the runway. The pilot attempted to correct the drift by applying full right rudder and power to no avail. The airplane subsequently struck a sign along the edge of the runway and ground looped, which resulted in substantial damage to the aft fuselage. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation. 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 Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
  • C Environmental issues-Conditions/weather/phenomena-Wind-Tailwind-Effect on operation - C
  • C Environmental issues-Physical environment-Object/animal/substance-Sign/marker-Effect on operation - C

Verbatim from NTSB's published report. Source file NTSB_2019_WPR20CA058.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.