Casualties unknown

Pilot Strikes Unmarked Power Line on Final Approach (N7616W)

Seneca, IL, US

On July 14, 1991, a Piper PA-28-180 (registration N7616W) operated by Props & Throttles, Inc. was involved in an aviation accident near Seneca, IL. Investigators recorded the probable cause as: The pilot's failure to maintain adequate altitude during final approach, resulting in a collision with an unmarked power line. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 4 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-19Data APIEditorial standards

An aircraft crashed into a creek short of the runway after striking an unmarked power line during final approach at a private airport.

What happened

The pilot was conducting a landing operation at a private airport when the aircraft departed from the intended flight path. Witnesses observed the approach as being low and flat, indicating a lack of proper descent profile relative to the terrain. The aircraft struck an unmarked power line situated 485 feet from the runway threshold. At the point of impact, the power line was positioned 28 feet above ground level.

Following the collision with the obstruction, the aircraft continued its forward momentum and crashed into a creek located short of the runway. The incident occurred during the final phase of flight, just prior to touchdown. An examination of the pilot's logbook revealed no previous recorded flights to this specific airport, suggesting limited familiarity with the local environment.

The investigation

Investigators analyzed the physical evidence at the crash site and reviewed the pilot's operational history. The power line was confirmed to be unmarked, presenting a visual hazard that may have been difficult to detect during the approach. The proximity of the obstruction to the runway threshold (485 feet) placed it within the critical landing zone for aircraft on final approach.

Findings

The investigation highlighted several contributing factors to the accident. The unmarked power line served as a significant obstacle that was not adequately visible or anticipated by the pilot. The approach path was described by witnesses as low and flat, which likely contributed to the inability to clear the obstruction. Additionally, the lack of prior experience at this specific airport may have played a role in situational awareness.

The aircraft sustained substantial damage upon impact with the power line and subsequent crash into the creek. The pilot was involved in the incident, but specific injury details were not provided in the source text. The event underscores the importance of obstacle clearance and familiarity with airport surroundings during landing operations.

Probable cause

The pilot's failure to maintain adequate altitude during final approach, resulting in a collision with an unmarked power line.

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Frequently asked questions

What happened in the 14 Jul 1991 Piper PA-28-180 accident near Seneca, IL?

An aircraft crashed into a creek short of the runway after striking an unmarked power line during final approach at a private airport.

What aircraft was involved and where did it happen?

The accident on 14 Jul 1991 involved a Piper PA-28-180, registration N7616W, operated by Props & Throttles, Inc., at Seneca, IL.

What was the probable cause of the accident?

The pilot's failure to maintain adequate altitude during final approach, resulting in a collision with an unmarked power line.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X17485. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.