According to information on following link, Icon Air is planning to acquire two Boeing 737-300QC aircraft on dry lease.http://www.flyiconair.com/ic/news.html
Boeing 737-300QC (QC = Quick Change) equipped with main deck cargo door can be switched between passenger and cargo configuration in about an hour. For example, the aircraft can be used as freighter at night and as a passenger carrier during the day.
An initial fleet of two Boeing 737s apparently means Icon Air will be launched as a cargo and/or charter airline.
According to National Aviation Policy of Pakistan, for operating scheduled passenger flights, an airline needs to have a fleet of at least three air worthy aircraft registered in Pakistan.
Following photo shows a Boeing 737-300QC (G-CELP) of British low-cost airline Jet2 (jet2.com
)Boeing 737-300QC - G-CELP - Jet2
by Pete Hemsley
, on Flickr