Casualties unknown

Water Contamination Found in Fuel Control Valve After Departure (N52785)

Stow, MA, US

On January 10, 1993, a Cessna 182P (registration N52785) operated by John A Clinton was involved in an aviation accident near Stow, MA. Investigators recorded the probable cause as: AN INADEQUATE PREFLIGHT BY THE PILOT, WHICH ALLOWED WATER CONTAMINATION IN THE FUEL AND SUBSEQUENT LOSS OF ENGINE POWER; AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-07-04Data APIEditorial standards

During the first flight of the day after two months of inactivity, an airplane experienced intermittent engine sounds and black smoke, then crashed during a turn attempt. Inspection revealed water in the fuel control valve.

Accident Details

The airplane had been inactive for two months prior to the incident, which occurred during its first flight of the day. The aircraft was last refueled at Minute Man Airport in November. No witnesses observed the preflight inspection.

Two other pilots witnessed the departure from Runway 3. As the airplane climbed to approximately 100 feet above ground, the engine sounds became intermittent. The witnesses reported black smoke coming from the aircraft's exhaust during the climb.

A second witness, who observed the crash, stated that the pilot attempted to make a left turn, but the airplane fell to the ground in a near-vertical position.

Inspection Findings

Examination of the fuel system revealed that approximately one quarter of the fuel contents in the fuel control valve was water. Both fuel caps were secured to their respective tanks, and when sprayed with water, no leakage past the caps into the tanks was noted.

Examination of the engine did not disclose evidence of mechanical malfunction.

Frequently asked questions

What happened in the 10 Jan 1993 Cessna 182P accident near Stow, MA?

During the first flight of the day after two months of inactivity, an airplane experienced intermittent engine sounds and black smoke, then crashed during a turn attempt. Inspection revealed water in the fuel control valve.

What aircraft was involved and where did it happen?

The accident on 10 Jan 1993 involved a Cessna 182P, registration N52785, operated by John A Clinton, at Stow, MA.

What was the probable cause of the accident?

AN INADEQUATE PREFLIGHT BY THE PILOT, WHICH ALLOWED WATER CONTAMINATION IN THE FUEL AND SUBSEQUENT LOSS OF ENGINE POWER; AND FAILURE OF THE PILOT TO MAINTAIN ADEQUATE AIRSPEED, WHICH RESULTED IN A STALL.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X11653. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.