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Touch-and-go aborted due to carburetor venturi failure causing power loss and overrun (N25496)

Lee's Summit, MO, US

On June 28, 1984, a Cessna 152 (registration N25496) was involved in an aviation accident near Lee's Summit, MO. Investigators recorded the probable cause as: The failure of the primary venturi retainer clips, which allowed the primary venturi to move from its mounting position, resulting in the engine's inability to develop full power and the pilot's inability to reduce engine RPM to idle. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 8 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-20Data APIEditorial standards

During a touch-and-go maneuver, an aircraft failed to develop full power. The instructor pilot attempted to abort the takeoff but could not reduce RPM, leading to an overrun into mud.

What happened

The incident occurred during a touch-and-go landing operation. As the aircraft began its takeoff roll, the engine failed to develop full power. Recognizing the deficiency, the instructor pilot (CFI) pulled the throttle back to abort the takeoff. However, the engine RPM would not reduce to idle. The aircraft continued approximately 500 feet past the end of the runway and encountered a soft spot in the mud, causing it to nose over.

The investigation

An examination of the aircraft was conducted to determine the mechanical cause of the power loss. The inspection revealed that the primary venturi retainer clips, part number 29-113, had failed. This failure allowed the primary venturi to move from its mounting position, disrupting normal engine operation.

Findings

The investigation identified a critical mechanical failure as the root cause. The primary venturi retainer clips failed, which permitted the primary venturi to shift out of its correct mounting position. This displacement prevented the engine from developing full power during takeoff and inhibited the throttle from reducing RPM to idle, leading to the runway overrun.

Probable cause

The failure of the primary venturi retainer clips, which allowed the primary venturi to move from its mounting position, resulting in the engine's inability to develop full power and the pilot's inability to reduce engine RPM to idle.
Maintenance error

Related events

Same aircraft family

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Frequently asked questions

What happened in the 28 Jun 1984 Cessna 152 accident near Lee's Summit, MO?

During a touch-and-go maneuver, an aircraft failed to develop full power. The instructor pilot attempted to abort the takeoff but could not reduce RPM, leading to an overrun into mud.

What aircraft was involved and where did it happen?

The accident on 28 Jun 1984 involved a Cessna 152, registration N25496, at Lee's Summit, MO.

What was the probable cause of the accident?

The failure of the primary venturi retainer clips, which allowed the primary venturi to move from its mounting position, resulting in the engine's inability to develop full power and the pilot's inability to reduce engine RPM to idle.

More accident analyses

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001214X40076. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.