Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Another DC9 Question  
User currently offlineBruce From United States of America, joined May 1999, 5099 posts, RR: 13
Posted (11 years 4 months 1 week 6 days 18 hours ago) and read 2560 times:

What is the life limit (hours/cycles) on the DC9 airframe? Can it be extended by service or is there a total end-of-life limit? Would a plane with 73,000 landings be considered nearing the end or does it have a long time to go? That seems like a lot to me - this plane was new in March, 1967.

I know NWA has no plans to fade out the DC9 but won't they have to get rid of the oldest ones due to age?


Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
3 replies: All unread, jump to last
User currently offlineOkie From United States of America, joined Jul 2003, 3807 posts, RR: 3
Reply 1, posted (11 years 4 months 1 week 6 days 18 hours ago) and read 2521 times:

I can just pass on what an acquaintance with the FAA told me once so you can take it with a grain of salt.

A 737 (did not specify which model) was estimated to have about 50,000 cycles with normal maintenance.
A DC-9 (again did not specify any model) was estimated at 100,000 cycles with normal maintenance.

He commented that the Douglas used a heavier gauge/different alloy of material on the skin of the aircraft.


User currently offlineSlamClick From United States of America, joined Nov 2003, 10062 posts, RR: 66
Reply 2, posted (11 years 4 months 1 week 6 days 17 hours ago) and read 2495 times:

Don't believe there is a limit on hours or cycles. I believe that it is more, on-condition. There are other "aging fleet" issues that will probably drive them out of the skies before the sheet metal does. Wiring, tubing, and all of the things that deteriorate are likely to make them less and less desirable to the operators. I would not be surprised to see inspection schedules become more and more expensive, not only in terms of the actual procedure, but for frequency and the downtime on the airframe.

I used to read the FAA's MRR Summaries for the DC-9 and some issues, maybe 70% of the items detailed there were corrosion and cracks found in C and D checks. (at Republic and Eastern, mainly)

View Large View Medium
Click here for bigger photo!

Photo © Bob Garrard
View Large View Medium
Click here for bigger photo!

Photo © AirNikon

I've also been told that when Sunworld ceased operations one of their DC-9-14 airframes was one of the top two or three for time/cycles and, for that reason, it was re-acquired by the factory to be tested to destruction. Can anyone confirm that? (Maybe N9102)

View Large View Medium
Click here for bigger photo!

Photo © Brian Peters

Happiness is not seeing another trite Ste. Maarten photo all week long.
User currently offlineMiamiair From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 4 months 1 week 6 days 15 hours ago) and read 2407 times:

There is NOT any time/cycle limitation on the airframe. As long as it is properly maintained in accordance with its instructions for continued airworthiness, conforms to the type design it can keep flying until it is economically prohibitive. The original Design Service Objective (DSO) for the 707 I believe was 20,000 cycles. There are a couple of 707s that were flying for Boeing Aerospace Operations (Teaching E-3B Sentry AWACS Pilots) that had over 102,000 cycles.

Just an observation after working on Boeings, Lockheed, Douglas/McDonnell Douglas & Airbus; the Douglas airplanes are tanks, built tough and it shows to this very day.

Top Of Page
Forum Index

Reply To This Topic Another DC9 Question
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...
Another Taxi Question posted Tue Jul 17 2001 05:17:32 by Ydna_anderson
Another Anti-skid Question posted Tue Oct 17 2006 03:54:24 by Speedracer1407
Another Question For 1900 Pilots posted Mon Jan 2 2006 21:31:07 by MCPilot
Another Delta Wing Question posted Fri May 13 2005 11:09:49 by Lehpron
Another Most Asked Question! 737 Line posted Tue May 3 2005 06:10:22 by StealthZ
Another 737NG PFD Question. posted Sat Feb 12 2005 16:13:07 by Flying Belgian
Another Reverse Thrust Question posted Fri Dec 17 2004 11:51:58 by Regional757
Yet Another 747 Door Question posted Fri Jul 16 2004 03:16:13 by SafetyDude
MD80/DC9 Balance Question posted Sat Aug 16 2003 17:56:40 by UPSfueler
Another De-icing Question posted Tue Jul 29 2003 03:44:31 by Cancidas

Sponsor Message:
Printer friendly format