A couple of sites with some information
http://www.logbookmag.com/databases/articles.asp?ID=91&CatID=47
NC 15067, Sikorsky S-43, notes: C/n 4307, delivered to Pan Am in March 1936. Pan Am assigned this Baby Clipper to Panair do Brasil, registered PP-PAR. Conflicting sources indicate that this aircraft either crashed or was otherwise destroyed. The fate of this Sikorsky S-43 is not known.
http://www.aerialvisuals.ca/AirframeDossier.php?Serial=13984
Constructed as a S-43.
Sikorsky S-43 4307
On 29 October 1936
Civil registration, N15067, cancelled.
Exported to Brazil.
To Pan American Airways Inc, New York, NY with c/r N15067 (S-43, 4307).
Civil registration, N15067, cancelled.
Deregistered. Exported to Brazil.
Walt