On 7 June 1949, a Strato-Freight Curtiss Wright C-46D, registered in the United States as NC92857, crashed into the Atlantic Ocean 10 km (6.4 mi) west of San Juan-Isla Grande Airport in San Juan, Puerto Rico while en route to Miami, Florida.

[1] On 4 June 1949 (three days prior to the accident), the Strato Freight C-46 arrived in San Juan from Newark, New Jersey.

The aircrew declared an emergency; the plane subsequently crashed into the Atlantic Ocean, roughly 200 m (656 ft) off the coastline.

This was linked to the right engine ignition switch found in the left magneto position, only allowing the rear spark plugs to fire.

[6] The passengers on board were reportedly nervous prior to the crash due to the extra weight.