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CEN25LA243

2025-07-08 · Seguin, Texas, United States · Serious · 1 aircraft · Status: Completed

Airport 1TE4

Current FAA registration · N97577

Make / Model
STINSON 108
Year of manufacture
1946 · 79 years old at event
Engine
FRANKLIN 6A4150 SERIES (150 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19570415
ADS-B equipped
Yes — Mode-S AD99A5

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot’s failure to turn off the magneto switch before repositioning the propeller by hand which resulted in an inadvertent engine start.

Factual narrative

After refueling the airplane, the engine failed to start after two attempts, and the pilot elected to reposition the propeller by hand. The magneto switch was left in the ON position, and the engine inadvertently started which resulted in a serious injury to the pilot’s arm. The unoccupied airplane then collided with a large metal sign and came to rest upright. 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

FAA avdata. C = Cause, F = Factor.

  • — Aircraft-Aircraft power plant-Ignition system-Magneto/distributor-Incorrect use/operation
  • — Personnel issues-Task performance-Use of equip/info-Use of equip/system-Pilot
  • — Aircraft-Aircraft power plant-Engine (reciprocating)-(general)-Unintentional use/operation

Verbatim from NTSB's published report. Source file NTSB_2025_CEN25LA243.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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