Casualties unknown

Student Pilot's Mixture Cutoff During Simulated Engine Failure Leads to Gear Contact (N10629)

Miami, FL, US

On March 19, 1991, a Cessna 150L (registration N10629) operated by Adf Airways, Inc. was involved in an aviation accident near Miami, FL. Investigators recorded the probable cause as: TOTAL LOSS OF ENGINE POWER DUE TO INADVERTENT USE OF THE MIXTURE CONTROL BY THE STUDENT, INADEQUATE SUPERVISION BY THE CFI, AND DELAYED REMEDIAL ACTION BY THE CFI RESULTING IN THE OFF AIRPORT LANDING. 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

During a flight training exercise, a student inadvertently pulled the mixture to idle cutoff while responding to a simulated engine failure. The CFI failed to notice until the go-around, when the engine did not respond. The engine restarted, but the main landing gear contacted sawgrass.

Incident Details

A certified flight instructor (CFI) was conducting a training flight with a student pilot. As part of the lesson, the CFI reduced the throttle to idle to simulate an engine failure. During the subsequent emergency procedures, the student pulled the mixture control to the idle cutoff position, inadvertently shutting off fuel to the engine.

Sequence of Events

The CFI did not detect the student's action. When the student attempted to apply throttle for a go-around, the engine failed to respond. At that moment, the aircraft was just above sawgrass. The CFI then pushed the mixture control to the full rich position. The engine started, but not before the main landing gear made contact with the sawgrass.

Outcome

No injuries or damage beyond the gear contact with sawgrass were reported. The training flight was interrupted, and the aircraft was likely inspected for any potential damage. The incident highlights the importance of monitoring student actions during critical phases of flight.

Frequently asked questions

What happened in the 19 Mar 1991 Cessna 150L accident near Miami, FL?

During a flight training exercise, a student inadvertently pulled the mixture to idle cutoff while responding to a simulated engine failure. The CFI failed to notice until the go-around, when the engine did not respond. The engine restarted, but the main landing gear contacted sawgrass.

What aircraft was involved and where did it happen?

The accident on 19 Mar 1991 involved a Cessna 150L, registration N10629, operated by Adf Airways, Inc., at Miami, FL.

What was the probable cause of the accident?

TOTAL LOSS OF ENGINE POWER DUE TO INADVERTENT USE OF THE MIXTURE CONTROL BY THE STUDENT, INADEQUATE SUPERVISION BY THE CFI, AND DELAYED REMEDIAL ACTION BY THE CFI RESULTING IN THE OFF AIRPORT LANDING.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001212X16660. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.