Casualties unknown

Flight instructor and student struck power line during training approach (N5388R)

Concord, CA, US

On July 6, 1990, a Cessna 172RG (registration N5388R) operated by Buchanan Flying Club, Inc. was involved in an aviation accident near Concord, CA. Investigators recorded the probable cause as: The student pilot's failure to maintain aircraft control during the approach, resulting in a high rate of descent and collision with a power line. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-22Data APIEditorial standards

A flight training aircraft descended too rapidly near the outer marker, striking a high-tension power line before the instructor could arrest the descent.

What happened

During a flight training exercise, the aircraft was approaching the airport when it deviated approximately 10 degrees to the left of the intended course. This deviation occurred while the aircraft was near the outer marker. At this point in the approach, the flight instructor observed that the student pilot had initiated a very high rate of descent.

The situation escalated quickly as the aircraft continued its steep downward trajectory. The flight instructor attempted to take control or provide corrective input to stop the descent. However, before any effective correction could be implemented, the aircraft collided with a high-tension power line. The impact resulted in a crash at that location.

The investigation

Post-accident examination focused on the sequence of events leading to the collision. The flight instructor provided a detailed account of the student's handling of the aircraft during the final approach phase. Key observations included the lateral deviation from the centerline and the excessive vertical speed. No mechanical failure was cited as a primary factor; the narrative centers entirely on pilot control and situational awareness.

Findings

The primary contributing factor was the student pilot's loss of aircraft control during the approach. Specifically, the high rate of descent prevented the flight instructor from recovering the aircraft in time. The collision with the power line was a direct result of this uncontrolled descent path.

Safety message

This incident highlights the critical importance of maintaining proper glide slope and airspeed control during instrument or visual approaches. Instructors must monitor student performance closely for deviations in both lateral and vertical planes to allow sufficient time for intervention.

Probable cause

The student pilot's failure to maintain aircraft control during the approach, resulting in a high rate of descent and collision with a power line.

Frequently asked questions

What happened in the 6 Jul 1990 Cessna 172RG accident near Concord, CA?

A flight training aircraft descended too rapidly near the outer marker, striking a high-tension power line before the instructor could arrest the descent.

What aircraft was involved and where did it happen?

The accident on 6 Jul 1990 involved a Cessna 172RG, registration N5388R, operated by Buchanan Flying Club, Inc., at Concord, CA.

What was the probable cause of the accident?

The student pilot's failure to maintain aircraft control during the approach, resulting in a high rate of descent and collision with a power line.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X23730. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.