Originally Posted by
Less Hair
There are military versions of the 737NG with a big cargo door used in combi coniguration. USN is one operator.
FYI, yes the 737-700C has a big cargo door, but the "C" in 737-700C stands for "convertible," not "combi." I believe the FAA approval allows the airplane to be operated in either all passenger or all cargo configurations. I don't believe it is FAA approved for "combi," or partial passenger and partial cargo on the main deck, operation. See the FAA TCDS for TC A16WE on page 47, available on rgl.faa.gov.
The military utilization is not necessarily limited by the FAA approval, though, so it's possible a military service somewhere has a combi configuration. However, in general these days the US military is having the FAA approve all basic configurations of airplanes that are also civil products, so I doubt the US military is using a combi configuration.