Skip to content

GAA16CA090

2015-12-19 · Portales, New Mexico, United States · None · 1 aircraft · Status: Completed

Airport PRZ

Current FAA registration · N97411

Make / Model
STINSON 108
Year of manufacture
1946 · 69 years old at event
Engine
FRANKLIN 6A4150 SERIES (150 hp)
Seats / Engines
4 seats · 1 engine
Last airworthiness date
19560212
ADS-B equipped
Yes — Mode-S AD9516

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

The pilot receiving instruction's improper brake application during the flight instructor's aborted landing, which resulted in a loss of directional control and a runway excursion. Contributing to the accident was the flight instructor's decision to perform flight training in an airplane without dual-equipped wheel brakes.

Factual narrative

The flight instructor, seated in the right seat, was providing tail-wheel flight instruction in an airplane equipped with wheel brakes only accessible to the pilot in the left seat. The flight instructor reported that he demonstrated the first landing to the pilot receiving instruction in the left seat. During the landing roll, he reported that he began to lose rudder effectiveness and the airplane started to veer to the right, so he applied full power to abort the landing. The flight instructor further reported that during the aborted landing, the pilot receiving instruction applied both toe brakes at the moment full power was applied. The flight instructor attempted to maintain directional control, but the left wing impacted the runway and the airplane veered off the runway to the left. The flight instructor reduced the power to idle and the airplane stopped in the terrain adjacent to the runway. The left wing and left aileron were substantially damaged. The pilot receiving instruction reported that he remained clear of the flight controls and brakes during the landing roll. He reported that he applied brakes only after the runway excursion to the left, after the flight instructor had reduced power to idle during the aborted landing. The flight instructor and pilot receiving instruction reported there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. Postaccident photos revealed deceleration skid marks leading off the runway first to the right, and additional deceleration skid marks about 550 feet further down the runway leading off to the left into the grass. The flight instructor reported the automated weather observing system about the time of the accident reported wind from 220 degrees true at 10 knots, which resulted in a 5 knot crosswind. The flight instructor, seated in the right seat, was providing tail-wheel flight instruction in an airplane equipped with wheel brakes only accessible to the pilot in the left seat. The flight instructor reported that he demonstrated the first landing to the pilot receiving instruction in the left seat. During the landing roll, he reported that he began to lose rudder effectiveness and the airplane started to veer to the right, so he applied full power to abort the landing. The flight instructor further reported that during the aborted landing, the pilot receiving instruction applied both toe brakes at the moment full power was applied. The flight instructor attempted to maintain directional control, but the left wing impacted the runway and the airplane veered off the runway to the left. The flight instructor reduced the power to idle and the airplane stopped in the terrain adjacent to the runway. The left wing and left aileron were substantially damaged. The pilot receiving instruction reported that he remained clear of the flight controls and brakes during the landing roll. He reported that he applied brakes only after the runway excursion to the left, after the flight instructor had reduced power to idle during the aborted landing. The flight instructor and pilot receiving instruction reported there were no mechanical malfunctions or failures with the airplane that would have precluded normal operation. Postaccident photos revealed deceleration skid marks leading off the runway first to the right, and additional deceleration skid marks about 550 feet further down the runway leading off to the left into the grass.  The flight instructor reported the automated weather observing system about the time of the accident reported wind from 220 degrees true at 10 knots, which resulted in a 5 knot crosswind. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12

NTSB Findings

FAA avdata. C = Cause, F = Factor.

  • C Personnel issues-Action/decision-Action-Unnecessary action-Student/instructed pilot - C
  • C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
  • F Personnel issues-Action/decision-Info processing/decision-Decision making/judgment-Instructor/check pilot - F
  • — Environmental issues-Conditions/weather/phenomena-Wind-Crosswind-Effect on equipment

Verbatim from NTSB's published report. Source file NTSB_2015_GAA16CA090.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

Matched on aircraft type or causal vocabulary (runway excursion). All research papers