Aircraft damage during FAA flight test at San Marcos Airport

No fatalities • San Marcos, United States of America • Landing (descent or approach)

A twin-engine aircraft sustained substantial damage after a hard landing during an experimental flight for the FAA at San Marcos Airport.

What happened

During a local flight intended for experimental purposes on behalf of the Federal Aviation Administration (FAA), a twin engine airplane experienced a significant impact during its final approach. While attempting to level off during the last segment of the flight, the aircraft struck the runway surface with excessive force.

The intensity of the landing caused the undercarriage to separate from the airframe, resulting in the plane sliding on its belly. Despite the severity of the impact, all four occupants were able to exit the wreckage without sustaining any injuries. The aircraft itself was declared a total loss due to damage sustained during the event.

Findings

Investigations into the accident identified several contributing elements to the crash. The primary factor was an improper level-off maneuver following the incorrect manipulation of the powerplant and its associated controls. Additionally, the incident involved an overload failure and noted that the aircraft was being operated by an FAA flight test pilot at the time of the impact.

Probable cause

The accident was caused by a hard landing resulting from the improper use of engine and powerplant controls during the level-off phase.

Frequently asked questions

What happened in the 1979-05-31 Swearingen SA226T Merlin III accident near San Marcos, United States of America?

A twin-engine aircraft sustained substantial damage after a hard landing during an experimental flight for the FAA at San Marcos Airport.

Were there any fatalities in the 1979-05-31 Swearingen SA226T Merlin III accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 1979-05-31 involved a Swearingen SA226T Merlin III, registration N5654M, operated by Fairchild Aircraft Corporation, at San Marcos, United States of America.

What was the probable cause of the accident?

The accident was caused by a hard landing resulting from the improper use of engine and powerplant controls during the level-off phase.

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