In all converted 747-400's lining is installed (new regulations.), so it's very difficult to show the actual modification details (tension ties etc.) inside the 747-400BCF or 747-400BDSF aircraft. Almost every modification detail is hidden by white panels.
For that reason a 747-300SF shows the required modification far better, because only partial lining is installed.
All converted 747-100,-200, -200(SUD) and 300 freighters (by Boeing and others) are mentioned "Special Freighter" ( -SF
) and are modified according a Supplemental Type Certificate (STC) and/or Boeing Master Change.
To differentiate the( more expensive) Boeing freighter modifications from the "third party" modifications, Boeing invented a new way to name the P-F converted aircraft :
All converted 747-400 aircraft by a Boeing designed modification are called "Boeing Converted Freighter" (-BCF).
In the 747 type certificate this variant is listed as a new 747-sub type.
See page 24/55 : http://www.airweb.faa.gov/Regulatory...070737c/$FILE/A20WE%20Rev%2047.pdf
The 747-400's converted by Bedek Aviation, Israel (third party) are now called "BeDek Special Freighter" (-BDSF
) and are operated under a Supplemental Type Certificate (STC).
See : http://www.iai.co.il/sip_storage/FILES/5/34595.jpg
See : http://www.youtube.com/watch?v=0JeDrrOL5gk&feature=player_embedded
[Edited 2011-11-20 00:22:56]
Operating a twin over the ocean, you're always one engine failure from a total emergency.