why do some converted freighters retain cabin windows

[newscaster]

Considering they go through teh process of being converted why do they leave out plugging the windows as well? any advantages/disadvantages involved?

[Taikonaut]

No need to replace them. The inside fuselage is paneled up. Some overwing window holes are cut in case we need to look outside to check for the monster on the wing.

[Intruder]

It's also cheaper than replacing them.

[newscaster]

I have seen freighters with un-sealed windows even from inside, like on normal pax aircraft.

[Daysleeper]

could be quick change version. Ie by night a freighter and by day a passenger aircraft. seats come on pallets. Popular on the 737 and BAe146 as well as many smaller turboprops such as ATR, Metro , C406. Otherwise a combi, where some of the cabin is used for freight and some for passengers. Ie 747-300 varients.

As Taiko and intruder say its easier and cheaper to do as little as possible on many conversion progs. so often the windows are left in.

[Huck]

On our museum-quality 727's, the aft pax doors are there also, just covered by the interior panels. Part of the exterior preflight inspection is to make sure the handles are still retracted!

[GotTheTshirt]

Technically there is no different between windows and blanks.

The windows make a cheaper conversion, however they are more of a maintenance problem as they have to be inspected and sometimes replaced.
Ya pay yer money and take yer choice.

The freighters with blanks normally a couple of places each side with windows to look at wing leading edge and engine intake for ice secretion plus ability to look at landing gear mechanical indicators ( where these are on the top of the wing.)

[Buster Hyman]

I thought it had something to do with Feng Shui !