High Quality Content by WIKIPEDIA articles! Pan Am Flight 1104, Trip No. 62100, was a Martin M-130 flying boat nicknamed the Philippine Clipper that crashed on the morning of January 21, 1943 in Northern California. The aircraft was operated by Pan American World Airways, and at the time of the crash was transporting ten US Navy personnel from Pearl Harbor, Hawaii to San Francisco, California. The aircraft crashed in poor weather into mountainous terrain approximately 7 miles (11 km) southwest of Ukiah, California due to pilot error.