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Water and Debris Contamination Causes Crash of Infrequently Flown Cessna 172

Water and Debris Contamination Causes Crash of Infrequently Flown Cessna 172
A Cessna 172 experienced a total engine failure and subsequent crash near Rocky Mount/Wilson Regional Airport (KRWI) in North Carolina on April 14, 2024. The failure was attributed to water and debris contamination within the aircraft’s fuel system, raising significant concerns about maintenance practices and safety protocols in general aviation, particularly for aircraft that are flown infrequently.
Sequence of Events and Pilot Response
The pilot, who was also a certified mechanic, had fueled both the Cessna 172 and an escort aircraft at Delaware Airpark (33N) in Dover, Delaware, prior to departure. He reported conducting a thorough preflight inspection, including a visual check of the fuel tanks, and performed an engine run-up without detecting any anomalies. The aircraft was carrying 46 gallons of fuel and completed nearly three hours of uneventful flight.
Difficulties arose during the descent into KRWI when the pilot reduced engine power and applied carburetor heat. The engine abruptly lost all power. Despite confirming the fuel selector was set to BOTH tanks, activating the auxiliary fuel pump, enriching the mixture, and attempting restarts with and without carburetor heat, the engine failed to respond. With limited alternatives, the pilot executed a forced landing on a lit road. During the landing, the aircraft struck power lines before coming to rest near an intersection. Fortunately, the pilot was uninjured.
Investigation Findings
An FAA inspection of the wreckage revealed the aircraft resting at a 45-degree angle with substantial damage to both wings, the fuselage, and the empennage. The left fuel tank was breached, but fuel recovered from it was free of contaminants. However, rust was observed at both fuel filler ports. Fuel samples taken from the gascolator and carburetor bowls confirmed the presence of water and debris contamination.
Examination of the engine showed continuity in the crankshaft and valvetrain, but the intake valve on cylinder No. 3 was found stuck open. Abnormal markings were noted on cylinders Nos. 1 and 3, and the piston rings appeared improperly seated. Both magnetos produced spark on all leads, indicating ignition was not the cause of failure.
Maintenance records indicated the engine had undergone an overhaul in January 2022. The pilot, who also performed the annual inspection on the day of the accident, had logged only 1.0 hour of flight time since the major overhaul.
Implications for General Aviation Safety
This incident highlights the inherent risks associated with aircraft that are flown infrequently, particularly the vulnerability of fuel systems to contamination from environmental exposure. Industry experts suggest that such accidents may prompt increased regulatory scrutiny of maintenance and safety protocols, potentially resulting in higher insurance premiums for similar aircraft. Competitors in the general aviation sector may respond by emphasizing enhanced safety measures and preventive maintenance strategies.
The crash underscores the critical importance of rigorous safety checks and ongoing vigilance to mitigate environmental factors that can compromise aircraft integrity. The liabilities and operational risks stemming from lapses in maintenance or inspection are likely to remain a focal point for regulators and operators in the aftermath of this event.

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