No fatalities

8 May 2017: Piper PA 18A 135 (N245KW) — COEUR D'ALENE, ID

COEUR D'ALENE, ID, United States

On 8 May 2017, a Piper PA 18A 135 (registration N245KW) was involved in an aviation accident near COEUR D'ALENE, ID. No fatalities were reported. Investigators recorded the probable cause as: The loss of yaw control due to an inadequately compressed rudder swage, which resulted from inadequate maintenance and led to the separation of the forward right rudder cable. 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 PA18A (N245KW) was substantially damaged during a forced landing after takeoff from Coeur d'Alene Airport, Idaho. The pilot sustained minor injuries. The accident occurred on May 8, 2017, around 1330 PDT.

Accident Details

On May 8, 2017, about 1330 Pacific daylight time, a Piper PA18A airplane, registration N245KW, was substantially damaged when it impacted terrain shortly after takeoff from Coeur d'Alene Airport (COE), Coeur d'Alene, Idaho. The private pilot sustained minor injuries. The airplane was registered to and operated by the pilot under Title 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed, and no flight plan had been filed for the local flight.

Pilot Report

The purpose of the flight was to practice maneuvers in the local area. The pilot, seated in the front seat, reported that during takeoff he applied one notch of flaps to assist with a shorter takeoff roll. During the initial climb, the airplane yawed to the left, and he applied right rudder; however, the airplane did not respond. About 50 to 75 feet above ground level, the pilot retarded the throttle and initiated a forced landing. The airplane impacted the ground in a nose-down attitude and came to rest oriented about 90 degrees perpendicular to the runway.

Post-Accident Examination

On July 20, 2017, the airplane was examined at a secure facility by an NTSB Investigator accompanied by a Federal Aviation Administration Inspector. The right rudder pedal was found full forward against the firewall and trapped behind the cabin's front "V" brace. The right rudder cable, between the front and rear seat, had detached at the rear seat foot pedal connection. The thimble remained attached to the rear seat pedal assembly, and the free end of the cable was found loosely threaded through its swage sleeve. The failed rudder cable and swage sleeve appeared bright and clean when compared to the remaining rudder cables in the system, consistent with its recent replacement. There was no annotation in the maintenance logbooks indicating the cable had been replaced.

Contributing factors

Causes

Yaw control — Not attained/maintainedIncorrect service/maintenanceMaintenance personnelRudder control system — Failure

Other contributing factors

Pilot