No fatalities

5 Aug 2016: PIPER PA 25-235 (N6542Z) — Miller, MO

Miller, MO, United States

On 5 Aug 2016, a PIPER PA 25-235 UNDESIGNAT (registration N6542Z) was involved in an aviation accident near Miller, MO. No fatalities were reported. Investigators recorded the probable cause as: Improper swaging of the aileron control cable fitting, which allowed the aileron cable to separate from the control turnbuckle. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 1778583330Data APIEditorial standards

A Piper PA-25-235 experienced aileron cable separation during a test flight after restoration; the pilot was uninjured and the airplane was substantially damaged.

Accident Overview

On August 5, 2016, at approximately 1800 central daylight time, a Piper PA-25-235 airplane, registration N6542Z, impacted terrain near Kingsley Airfield (MO9) in Miller, Missouri. The commercial-rated pilot was not injured, and the airplane sustained substantial damage. The aircraft was registered to and operated by a private individual under 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed, and the flight operated without a flight plan.

Pilot Account

According to a statement provided to the Federal Aviation Administration (FAA) by the pilot, he was test-flying N6542Z, which had just undergone a complete restoration. Approximately 10 minutes after takeoff, the left aileron cable separated from the control stick. The pilot reported that he was able to turn the airplane back toward the runway. As the airplane slowed, it became increasingly difficult to control. The right wing then impacted a cornfield about 300 feet from the runway.

Examination Findings

An examination of the airplane by FAA inspectors revealed that the swage fitting on the aileron control cable had been improperly swaged. This allowed the aileron cable to come loose from a control turnbuckle. The aileron cable had been replaced and rigged during major maintenance, and the airplane completed its annual inspection on February 9, 2016. The accident flight was the first flight since that restoration and annual inspection.

Maintenance History

The aileron cable was replaced and rigged during major maintenance, and the annual inspection was completed on February 9, 2016. The accident flight marked the first operation of the aircraft following the restoration and inspection.

Probable cause

Improper swaging of the aileron control cable fitting, which allowed the aileron cable to separate from the control turnbuckle.

Contributing factors

Incorrect service/maintenanceMaintenance personnel