Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
P&W JT9D-7R4 Questions  
User currently offlineBoeing757/767 From United States of America, joined Jun 1999, 2286 posts, RR: 1
Posted (9 years 1 month 1 week 2 days 4 hours ago) and read 6060 times:

Is there an online resource for a list of all P&W JT9D-7R4s ever built?

Also, what's the differences between the different model numbers? Are there significant changes in the discs or are the differences primarily in compressor speeds and engine mounting? What does it take to place a 7R4H1 onto a 767 or convert a 7R4H1 to a 7R4D or -E?

Thanks in advance for your help!

Free-thinking, left-leaning secularist
1 replies: All unread, jump to last
User currently offlineMarkC From United States of America, joined Apr 2006, 259 posts, RR: 0
Reply 1, posted (9 years 1 month 1 week 1 day 23 hours ago) and read 5983 times:

I know a lot more about 4000's, but here's what I do know.

They are broken down by installation. Airbus (either 300 or 310) have D1, E1, H1. 767 has D, E, E4. 747 has G2.

Contrary to 4000's the 767's and the G2's definately have internal differences. The archetecture is the same, but I believe some of the G2 design and materials are better. Meaning the turbine discs and mating hardware.

As to the difference between 767 and Airbus, I believe that it is mostly installation related, meaning anything that interacts with the airframe. Cabin bleeds, tube placement, and especially the gearbox. Airbus have two hydraulic pump shafts, and Boeing have 1. I think the internal parts are identical, at least comparing A and B models of like thrust levels.

I don't think you can convert one to the other, even Airbus to 767. You could physically do it....but it would not be legal regulation wise. 4000's can be swapped model to model, A to B to McD under the instructions of Service Bulletins. Can't recall being able to do that with a 7R4.

Top Of Page
Forum Index

Reply To This Topic P&W JT9D-7R4 Questions
No username? Sign up now!

Forgot Password? Be reminded.
Remember me on this computer (uses cookies)
  • Tech/Ops related posts only!
  • Not Tech/Ops related? Use the other forums
  • No adverts of any kind. This includes web pages.
  • No hostile language or criticizing of others.
  • Do not post copyright protected material.
  • Use relevant and describing topics.
  • Check if your post already been discussed.
  • Check your spelling!
Add Images Add SmiliesPosting Help

Please check your spelling (press "Check Spelling" above)

Similar topics:More similar topics...
Questions About Ground Control & Dispatch posted Mon May 9 2005 04:25:27 by BN747DFWHNL
Wheels & Tires - Questions? posted Sun Dec 5 2004 20:53:27 by Mr Spaceman
DC-9 & DC-10 Engine Questions? posted Thu Sep 18 2003 21:30:56 by Mr Spaceman
ADI & Ehsi Questions posted Thu Aug 28 2003 11:14:30 by Liamksa
727 & Hushkit Questions posted Mon Feb 17 2003 22:31:10 by Bruce
MD80 & 727 Engine Sounds Questions posted Sat Dec 21 2002 22:01:58 by Bruce
2 Questions On 767 Switches & Buttons posted Wed Nov 27 2002 00:30:47 by Bio15
Questions For A&Ps posted Sat Dec 22 2001 20:58:18 by UAL Bagsmasher
A&P Questions posted Wed Feb 28 2001 22:31:08 by Chopper
A&P Mechanic Questions posted Fri Jan 26 2001 03:17:51 by Ericmetallica

Sponsor Message:
Printer friendly format