Sponsor Message:
Civil Aviation Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Strange JT9Ds On Some 742s  
User currently offlineWoodsboy From United States of America, joined Mar 2000, 1042 posts, RR: 2
Posted (14 years 4 months 3 weeks 4 days 14 hours ago) and read 2673 times:

So- can anyone explain why there are a few 742 out there (Polar Air Cargo to name one) with JT9Ds that dont look like any other the other JT9Ds on 747s?? What I mean is, they look like the JT9D when used on the DC-10-40 or Airbus A300, they dont have that same look as UAs 742, NW 742s or any other ones I can find!

Whats the reason for the different cowlings and intakes?

Click for large version
Click here for full size photo!

Photo © Jonathan Simmons

pictured is N921FT with JT9D-70As

3 replies: All unread, jump to last
User currently offlineRmm From Australia, joined Feb 2001, 527 posts, RR: 1
Reply 1, posted (14 years 4 months 3 weeks 4 days 14 hours ago) and read 2651 times:

This might help,



User currently offlineLaxintl From United States of America, joined May 2000, 29172 posts, RR: 50
Reply 2, posted (14 years 4 months 3 weeks 4 days 12 hours ago) and read 2608 times:

The PW JT9D-70A in essence is a 7Q engine however with GE style cowlings.
From a operational view I have experienced two disadvantages, one the aircraft operating weights is a bit higher than traditional 7Q powered planes as the cowl structural design is bulkier and thus adds weight. The second operational problem I have seen is problems with the thrust reversers. The function of the reverser cowls is not as near reliable as the standard PW engine reversers leading to lots of sitautions were one of the reversers were considered inoperative. In addition due the limited success of the -70A engine, reverser repairs could be both time consuming and costly due to a lack of available parts.

From the desert to the sea, to all of Southern California
User currently offlineYyz717 From Canada, joined Sep 2001, 16525 posts, RR: 54
Reply 3, posted (14 years 4 months 3 weeks 4 days 9 hours ago) and read 2564 times:

The 70A predated the 7Q and did not sell well. SAS, Flying Tigers, Air Madagascar ordered the 70.

I dumped at the gybe mark in strong winds when I looked up at a Porter Q400 on finals. Can't stop spotting.
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Egypt Air- Sending Strange Aircraft On Some Routes posted Fri Mar 12 2004 19:29:15 by ToBEYwithMEA
Strange Codeshare On LH / EN 4002 posted Fri Nov 3 2006 14:03:18 by 764
Airlines Spying On Some Pax? posted Wed Apr 19 2006 05:39:23 by Redneckslim
Need Some Info On Some EK Flights posted Mon Apr 10 2006 13:00:08 by SQno1
Strange Markings On ATL Terminal Floor posted Sun Feb 5 2006 22:11:05 by DeltaGator
United Bidding On Some Independence Air Assets posted Fri Dec 23 2005 16:30:14 by Bicoastal
Exorbitant Air Fares On Some Routes! Too Much! posted Thu Dec 22 2005 20:45:31 by RootsAir
Entertainment On Some Airlines posted Mon Oct 24 2005 19:08:09 by Bmi332
AN124 At AFW? Strange Plane On Google posted Mon Sep 5 2005 17:35:59 by Skywatch
Oneworld Sticker Gone On Some Aer Lingus Aircraft? posted Sat Sep 3 2005 13:29:33 by Shamrock350