No fatalities

Porpoising During Touch-and-Go Results in Runway Excursion (N150CL)

Spring, TX, US

On May 17, 1994, a Cessna 150M (registration N150CL) operated by National Aviation Services was involved in an aviation accident near Spring, TX. No fatalities were reported. Investigators recorded the probable cause as: THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE ATTEMPTED TAKEOFF FROM THE TOUCH AND GO LANDING. FACTORS WERE THE INADVERTENT PORPOISE AND THE SOFT TERRAIN. 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 touch-and-go, the pilot attempted a short field landing then retracted flaps and added power. The airplane porpoised, departed the runway left side, crossed a taxiway, and came to rest in wet grass 1,000 feet away. Damage to firewall and wing spars occurred.

Accident Overview

During a routine traffic pattern for a touch-and-go landing, the pilot elected to perform a short field landing. After touchdown, the pilot moved the flap selector to the 'UP' position, added power, and set the carburetor heat to the 'COLD' position. The airplane became airborne and began to porpoise, a series of oscillations in pitch.

Sequence of Events

The porpoising motion caused the airplane to depart the left side of the runway. It then traveled through grass, crossed a taxiway, and continued until it came to rest in wet grassy terrain approximately 1,000 feet from the runway.

Aircraft Damage

Subsequent inspection revealed damage to the airplane firewall, left wing spar, and rear inner spar. No other details regarding the extent of damage or other components were provided.

Conclusion

The accident sequence involved a short field landing attempt during a touch-and-go, followed by immediate flap retraction and power application, leading to porpoising and a runway excursion. No causal analysis or contributing factors are available from the source.

Frequently asked questions

What happened in the 17 May 1994 Cessna 150M accident near Spring, TX?

During a touch-and-go, the pilot attempted a short field landing then retracted flaps and added power. The airplane porpoised, departed the runway left side, crossed a taxiway, and came to rest in wet grass 1,000 feet away. Damage to firewall and wing spars occurred.

Were there any fatalities in the 17 May 1994 Cessna 150M accident?

No fatalities were recorded in this accident.

What aircraft was involved and where did it happen?

The accident on 17 May 1994 involved a Cessna 150M, registration N150CL, operated by National Aviation Services, at Spring, TX.

What was the probable cause of the accident?

THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL DURING THE ATTEMPTED TAKEOFF FROM THE TOUCH AND GO LANDING. FACTORS WERE THE INADVERTENT PORPOISE AND THE SOFT TERRAIN.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001206X01287. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.