What happened
The pilot was conducting banner towing operations using a Piper J3C-65 aircraft. During the operation, the aircraft executed an unsuccessful attempt at picking up a banner. Following this event, the pilot maneuvered the aircraft at an altitude of approximately 400 feet while climbing in a left turn, preparing for another pickup attempt.
During this phase of flight, the aircraft experienced a sudden loss of power. Unable to maintain altitude or reach a suitable runway, the pilot initiated a forced landing procedure. The aircraft ultimately impacted a marsh area. Post-incident, the pilot reported that the fuel quantity gauge was inoperative at the time of the accident.
The investigation
Examination of the event details indicates that the primary mechanical factor involved the fuel management system. The pilot confirmed that the instrument responsible for monitoring fuel levels was not functioning correctly during the flight. This failure prevented accurate assessment of remaining fuel reserves.
Findings
The sequence of events was driven by fuel exhaustion. Because the fuel quantity gauge was inoperative, the pilot could not verify the amount of fuel available in the tanks. This lack of information led to the depletion of fuel during the maneuvering phase. The resulting power loss necessitated the emergency landing in the marsh.
Safety message
Pilots must ensure that all flight instruments, particularly those monitoring critical systems like fuel quantity, are fully operational before flight. Relying on a single gauge without cross-checking or using alternative methods to determine fuel status can lead to catastrophic outcomes.