Sponsor Message:
Aviation Technical / Operations Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Engine Reliability  
User currently offlinecobra27 From Slovenia, joined May 2001, 1033 posts, RR: 0
Posted (4 years 8 months 1 week 2 days 16 hours ago) and read 4912 times:

I think the PT6-44 (not sure the version) has a failure an average every 250 000 hours. Thats preety good record considering thay you may have other things that can damage the engine (like contaminated fuel, mechanical damage, bad servicing...)
PT6 reliability is well known, but I think big trubofans are even better, 777 lost a handful time in millions of flight hours.
Does anbody have any info (no mater which engine, can bo O-235, Rotax, Trents, Walters, Kuznetsov, CF6, CFM56...)?

7 replies: All unread, jump to last
 
User currently offline411A From United States of America, joined Nov 2001, 1826 posts, RR: 8
Reply 1, posted (4 years 7 months 3 weeks 5 days 8 hours ago) and read 4456 times:

Quoting cobra27 (Thread starter):
Does anbody have any info (no mater which engine, can bo O-235, Rotax, Trents, Walters, Kuznetsov, CF6, CFM56...)?

With an older type, yes.

B707-320B, owned by American Airlines had one JT3D-3B on wing for 22,000 flight hours, approximately.
A couple more data points.

Pratt&Whitney R2800CB16 radial engines used on the DC-6B, UAL had an FAA approved TBO of 3,300 hours.

Prinair, of Puerto Rico, flying re-engined deHavilland Heron aircraft (four TCM I0-520 engines) had an FAA approved TBO of 4,000 hours, with a top overhaul at 2,000.

If you privately own many (but not all) turbine powered general aviation aircraft, operated under 14CFR91, there is normally no stipulated engine overhaul period...however, the FAA does mandate hot section inspections at a specified period.

[Edited 2010-04-30 11:39:50]

User currently offlineLMP737 From , joined Dec 1969, posts, RR:
Reply 2, posted (4 years 7 months 3 weeks 5 days 8 hours ago) and read 4445 times:

American had a CF-6 on one of it's 767's that stayed on wing for 40000 hours.

User currently offlinekelpKID From United States of America, joined Nov 2005, 6428 posts, RR: 3
Reply 3, posted (4 years 7 months 3 weeks 5 days 6 hours ago) and read 4413 times:

IIRC, FI (Iceland Air) holds the official Guiness Book of World Records record for engine time on wing: 56,000 hours for an RB-211 on a 757...  

Not too suprising, because, as I understand it, the RB-211 is very underworked on the 757 (i.e. the bird is way overpowered).



Celebrating the birth of KELPkidJR on August 5, 2009 :-)
User currently offlineHMUcfm56 From Germany, joined Jul 2005, 74 posts, RR: 0
Reply 4, posted (4 years 7 months 3 weeks 5 days 6 hours ago) and read 4394 times:

"TUIfly CFM56-7B Engine Logs 40,000 Hours On Wing Without Removal" (02/2010).
Won't be on wing longer than 48.500 hrs due to LLP replacement.

Source:
http://www.cfm56.com/press/news/tuif...+hours+on+wing+without+removal/512


The article also mentiones a CFM56-3 with more than 40.000 hrs.


User currently offlinecobra27 From Slovenia, joined May 2001, 1033 posts, RR: 0
Reply 5, posted (4 years 7 months 3 weeks 3 days 16 hours ago) and read 4157 times:

Yes 60000 hours for jets is not uncommon anymore, I think even high cycle CFM made it to 60000 hours. It is a quite a reliability for commercial engine. But Lycomings and military jets don't come close

User currently offlinemrocktor From United States of America, joined Jan 2005, 1672 posts, RR: 49
Reply 6, posted (4 years 7 months 3 weeks 2 days 9 hours ago) and read 3890 times:

Reliability and time on wing are two different things. For instance, if the engine gets removed for a planned major overhaul that counts against time on wing - but not against reliability.

Typical third generation turbofans (that meaning late 80s technology and more recent) beyond the 1 in 1 million failure per flight hour rate for the engine proper. Bringing in the related aircraft systems (fuel, control, ice protection, etc.) drops that closer to a 1 in 100.000 flight hour IFSD rate for any reason on these engines.

When talking about such extreme reliability it is not very useful to discuss numbers more precise than orders of magnitude.

[Edited 2010-05-03 10:52:05]

User currently offlinecobra27 From Slovenia, joined May 2001, 1033 posts, RR: 0
Reply 7, posted (4 years 7 months 3 weeks 2 days 7 hours ago) and read 3837 times:

Quoting mrocktor (Reply 6):
Reliability and time on wing are two different things. For instance, if the engine gets removed for a planned major overhaul that counts against time on wing - but not against reliability.

Yesm, relaibility was the issue, those engine failure checklist are almost not needed


Top Of Page
Forum Index

Reply To This Topic Engine Reliability
Username:
No username? Sign up now!
Password: 


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!
  • DETAILED RULES
Add Images Add SmiliesPosting Help

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


Similar topics:More similar topics...
Worldwide 777 Engine/airframe Reliability posted Mon Sep 26 2005 18:18:46 by Zeke
Engine Smoke On Startup posted Thu Apr 15 2010 19:46:48 by MadDogJT8D
Three-Holer Engine Out Ferrying posted Fri Apr 9 2010 03:49:40 by faro
Spikes In Engine/Pack Noise During The Cruise? posted Thu Apr 1 2010 02:20:13 by faro
Can You Re-engine A Q200 With A Q400? posted Tue Mar 30 2010 03:52:45 by bjorn14
Videos For Jet Engine Geeks... posted Mon Mar 29 2010 13:30:56 by JoeCanuck
Lateral Position Of A Wing Mounted Engine posted Sun Mar 28 2010 10:32:39 by airbuske
A380 Engine Noise posted Thu Mar 25 2010 03:13:35 by hotplane
Rearview Mirrors For In-flight Engine Checks? posted Wed Mar 17 2010 08:26:51 by alwaysontherun
IFE-Its Cost And Reliability posted Sat Mar 13 2010 08:38:35 by B-HOP

Sponsor Message:
Printer friendly format