Sikorsky S-42
The Sikorsky S-42 was a commercial flying boat designed and built by Sikorsky Aircraft to meet requirements for a long-range flying boat laid out by Pan American World Airways ( Pan Am ) in 1931 . 
<triplet> Sikorsky S-42 <subj> Sikorsky Aircraft <obj> manufacturer <triplet> Pan American World Airways <subj> Sikorsky S-42 <obj> item operated