I suspect that the FAA changed the way they issued TCDSs after the 707 because it doesn't make a lot of sense to have different sheets for the same series of aircraft and maybe they came to that realization. Mark Quoting David MR <damiross3@xxxxxxxxxxx>: > The 707/720 family of aircraft are certified with the FAA under three > different Type Certificate Data Sheets (TCDS). For those not familiar with > the TCDS, here's the definition: "The Type Certificate Data Sheets (TCDS) > database is a repository of Make and Model information. The TCDS is a formal > description of the aircraft, engine or propeller. It lists limitations and > information required for type certification including airspeed limits, > weight limits, thrust limitations, etc." > > The TCDS can be found at http://tinyurl.com/47qze (long URL: > http://www.airweb.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/Ma > inFrame?OpenFrameSet ) > > Here's the TCDS for the 707/720 family: > 707-100, -200: TCDS 4A21 > 707-300, -400: TCDS 4A26 (I was surprised to see that the 100/200 series and > 300/400 series had different TCDS) > 720: TCDS 4A28 > > David R > http://home.comcast.net/~damiross/books.html > > -----Original Message----- > From: The Airline List [mailto:AIRLINE@xxxxxxxxxxxxxxxxx]On Behalf Of > mgreenwood@xxxxxxxxx > Sent: Friday, January 28, 2005 13:41 > To: AIRLINE@xxxxxxxxxxxxxxxxx > Subject: Re: Its Offical "787" > > > The 757 & 767 were developed concurrently although the 767 did have it's > first > flight approximately 5 months before the 757. As for the 720, the 707 was > designated the 720 when it was modified for short-to-medium routes and for > use > on shorter runways. I guess they didn't consider it a separate model, just > like the 777-200 and 777-300 aren't different models. > > Mark > > > Quoting David MR <damiross3@xxxxxxxxxxx>: > > > >Since the naming of the initial 707, all Boeing commercial jets have > > >>been named in succession based on the 7-7 formula: 717, 727, 737, 747, > > >757, 767 and 777 up to the latest Boeing commercial jet transport, the > 787. > > > > Not quite true. There was the 720. And the succession shown above is not > > correct. The 717 came last. The first 717 was actually a military > version > > of the 707. Also, if I'm not mistaken, the 767 saw service before the 757. > > > > David R > > http://home.comcast.net/~damiross/books.html > > -- > > No virus found in this outgoing message. > > Checked by AVG Anti-Virus. > > Version: 7.0.300 / Virus Database: 265.8.1 - Release Date: 1/27/2005 > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.300 / Virus Database: 265.8.1 - Release Date: 1/27/2005 > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.300 / Virus Database: 265.8.1 - Release Date: 1/27/2005 >