Md-90 Etops
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Md-90 Etops
Has anybody operated, or know of any MD90 operations that involve ETOPS (90 mins) and were they FAA or JAR operations? People seem to be taking narrow-bodies further afield these days. Many thanks in anticipation.
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MD90 doesnt have the range to justify ETOPS.
What exactly is the range where a regional jet DOES justify ETOPS?
60 minutes before midpoint, 60 minutes after midpoint. 400 knots with 1 engine out means 800 nautical miles distance is enough to be too far from returning or continuing in the middle. And surely MD-90 has longer range than this... SYD-AKL, 1169 nm, is impossible while staying within 60 minutes of diversion!
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You are having a giraffe
MD90? 3000nm range max on a dingo's breakfast (ie a pixx and lookaround)still air ISA? If it takes you 90mins to fly that far you are in an Airbus, shurely?
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3000nm range max
OK, back to the original question, are there any airlines operating the MD90 ETOPS? If not. why not?
Mutt
Last edited by mutt; 27th Sep 2007 at 06:08.
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Mutt thanks for keeping on track. There are some origin/destination pairs 1500-2000nm apart separated by ocean/remote areas. An MD-90 costs $10m compared to a B737NG starting at $30m. As well as being RNP/MNPS compliant, is the MD-90 up to pax oxygen/fire suppressant requirements?
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737NGs designed for ETOPS as I believe the MD-90 was. I've found a VIP operator, but thought maybe someone may have used MD-90 to Hawaii for example, and was after some practical experience. V2500 IFSD rate 6 times better than that required for ETOPS 180, so no problem there.
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Check out slide 6, it shows that the V2500 didnt achieve the required IFSD rates in 2006.
According to myboeingfleet the MD90 isnt ETOPS approved. The closest is the B717 with 75 minutes approval but no operators are using ETOPS.
Mutt
According to myboeingfleet the MD90 isnt ETOPS approved. The closest is the B717 with 75 minutes approval but no operators are using ETOPS.
Mutt
Last edited by mutt; 27th Sep 2007 at 16:42.
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Alliance Airlines (Australia) gained ETOPS (75mins) for their F100, so I'm sure the MD90 could be granted ETOPS approval. BTW ETOPS regs are changing (at least in Australia) and I believe all jet aircraft will be granted 75 mins.
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I fail to see the logic, so what if the Fokker 100 was granted ETOPS approval, it doesnt stand to reason that the MD90 would be. From our present experience with Boeing/Douglas, it would take a huge amount of money to encourage them to certify the aircraft for ETOPS.
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The point is any modern twin engine civil jet aircraft can gain etops approval if you are willing to invest some time and money into the project. Getting an approval (including etops) is a very hard process in Australia, as our CASA think they know more then the FAA.
Plus like I said the etops rules are changing and all aircraft (including the MD90) will be issused 75 mins.
Plus like I said the etops rules are changing and all aircraft (including the MD90) will be issused 75 mins.
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Are the APUs contained on the MDs certified for APU operations inflight similar to the Boeing twin jets as US registered airliners which are required under FAA Advisory Circular AC120-32a?
http://rgl.faa.gov/Regulatory_and_Gu...ges%201-15.pdf
http://rgl.faa.gov/Regulatory_and_Gu...ges%201-15.pdf
Last edited by captjns; 29th Sep 2007 at 09:16.
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Boeing is not interested in investing ANY money in the MD-line. They already cut the 717, which was a real niche, and they only promote their own designs. Which I understand fully.
Dani
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I flew MD80s on 5+30 flights frequently. Surely an MD90 could go that far as it is more fuel efficient.
It could easily be a problem with both cargo fire supression and also APU start capability, as well as electrical generators (no HMG) which might block ETOPS for MD90s.
Just guessing though.
It could easily be a problem with both cargo fire supression and also APU start capability, as well as electrical generators (no HMG) which might block ETOPS for MD90s.
Just guessing though.
