Casualties unknown

Engine Power Loss During Takeoff Results in Forced Landing (N733HY)

Hannibal, MO, US

On May 11, 1998, a Cessna 172N (registration N733HY) was involved in an aviation accident near Hannibal, MO. Investigators recorded the probable cause as: a loss of engine power due to undetermined reasons. A factor was the rough field in which the forced landing was made. 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 2026-07-04Data APIEditorial standards

A student pilot experienced a loss of engine power during takeoff, applied carburetor heat with temporary improvement, then total power loss, leading to a forced landing in a plowed field and substantial aircraft damage.

Accident Summary

A student pilot reported an engine power loss during takeoff at an altitude between 200 and 300 feet above ground level. The pilot attempted to restore power by applying carburetor heat, which provided a temporary improvement for approximately 30 to 45 seconds. Subsequently, the pilot turned off the carburetor heat, and the engine rpm did not change significantly. Shortly thereafter, the engine lost all power and the propeller stopped.

Sequence of Events

According to the pilot, the engine lost power shortly after takeoff. In response, the pilot activated the carburetor heat control, which seemed to help slightly for a brief period. After about 30 to 45 seconds, the pilot deactivated the carburetor heat, noting that the engine speed remained relatively unchanged. Soon after, the engine experienced a complete loss of power, and the propeller ceased to rotate.

Forced Landing and Damage

The pilot executed a forced landing in a plowed field. During the landing, the airplane sustained substantial damage. No further details regarding the extent of the damage or the condition of the occupants were reported.

Investigation

A post-accident inspection was conducted to determine the cause of the power loss. However, the inspection did not identify any specific mechanical or system failure that could explain the loss of engine power. The exact cause of the power loss remains undetermined.

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Frequently asked questions

What happened in the 11 May 1998 Cessna 172N accident near Hannibal, MO?

A student pilot experienced a loss of engine power during takeoff, applied carburetor heat with temporary improvement, then total power loss, leading to a forced landing in a plowed field and substantial aircraft damage.

What aircraft was involved and where did it happen?

The accident on 11 May 1998 involved a Cessna 172N, registration N733HY, at Hannibal, MO.

What was the probable cause of the accident?

a loss of engine power due to undetermined reasons. A factor was the rough field in which the forced landing was made.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X10007. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.