Hello guys, I am the person that owns the WhistlePig website... [fh227.rwy34.com
Anyway, the ONLY two FH-227s that wore the updated colours of Peidmont were N703U and N706U.....
With the exception of N712U that crashed in 1968. Half of the FH-227Bs went to Burma/Myanmar the others went to Iran and one stayed stateside until it was exported to France.
N701U, N702U, N704 and N706U went to Iran and N705U, N708U, N709U and N710U went to Burma as a donation by the US Department of State.
N703U stayed here and flew for Check Air out of Milwaukee until it was sold to TAT in France.
As for the windows.....Piedmont's 10 FH-227s were the ONLY FH-227s built by Fairchild to have the 13 windows per side....The extra window appeared as someone stated right ahead of the aft passenger and cargo doors.
As for Air Service Iran, I believe they adopted the "PI" colours when they bought N706U as it already wore those colours so 701, 702 and 704 were painted thusly....
N701U actually ended up wity another FH-227 operator in Iran called Asseman Airways. It is actually sitting at the Tehran Airport and is registered EP-SNA....I was sent a video of this aircraft by a friend over in Tehran that made a short walk around video and weven shot the interior which has been shamlessly stripped fo everything.....
Anyway, if any of you have any questions please ask....:)