A fatal accident involving a Britten-Norman BN-2A-26 Islander in the Caribbean was caused by water entering a fuel tank when the airplane was parked during heavy rainfall.
On October 7, 2012, a FlyMontserrat BN-2A Islander crashed on takeoff accident from Antigua-V.C. Bird International Airport (ANU). The pilot and two of the three passengers were killed.
FlyMontserrat Flight 107 was a scheduled service from Antigua to Montserrat. Weather conditions at the time of departure were good, although convective clouds and heavy rain showers had passed over the airport while the aircraft was parked before flight. Approximately 40 mm of rain fell at the airport during this period. There was no evidence that a water drain check was carried out on the aircraft following the rainfall.
Shortly after takeoff, the aircraft yawed and rolled to the right, descending rapidly and apparently out of control. It impacted the ground within the airport perimeter, right wingtip first and steeply banked to the right at low forward speed.
Examination of the wreckage showed the right hand engine was not producing power at the time of impact. Investigation of the fuel system showed contamination with significant quantities of water. The right-hand fuel filler cap was of a design that was incompatible with the filler neck. Tests showed that the cap, installed in the neck, could allow water to pass into the fuel tank, for example if the aircraft were parked during periods of rain.
- ECCAA Final Report (PDF)