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DC 9 -10 - Altitude Restriction  
User currently offlineNwafflyer From United States of America, joined Jul 2004, 1050 posts, RR: 2
Posted (11 years 3 months 2 weeks 4 days 10 hours ago) and read 3423 times:

A great little plane, but I'm curious why it has been restricted to 28,000 feet. Sure, there aren't many of them left, but still curious why the altitude restriction, the last ones I was on (all NWA), seemed to climb like they wanted to keep going up forever

8 replies: All unread, jump to last
User currently offlineOPNLguy From , joined Dec 1969, posts, RR:
Reply 1, posted (11 years 3 months 2 weeks 4 days 2 hours ago) and read 3333 times:

Just a hunch, but they may not be equipped to comply with the new RVSM airspace that recently took effect, the floor of which starts at 29,000 and goes to 41,000. (RVSM allows for 1,000 foot spacing versus the previous 2,000 feet). If an aircraft is not RVSM equipped, it has to stay out of RVSM airspace, and 28,000 would be its max altitude...

If NWA does indeed have their DC-9-10 fleet certified for RVSM ops, the particular aircraft you were on may have been non-compliant that day due to an inter-related MEL item, and may have thus been limited for a day or two until the offending item could be repaired...

[Edited 2005-02-15 21:34:50]

User currently offlineHAWK21M From India, joined Jan 2001, 31875 posts, RR: 54
Reply 2, posted (11 years 3 months 2 weeks 3 days 15 hours ago) and read 3162 times:

Makes a lot of sense.
What happens if an RVSM Aircraft encounters a snag in its Altitude measuring systems flying above FL280.Not considering stby Instruments.

Think of the brighter side!
User currently offlineLongHauler From Canada, joined Mar 2004, 6070 posts, RR: 43
Reply 3, posted (11 years 3 months 2 weeks 3 days 4 hours ago) and read 3114 times:

If you encounter any onboard malfunction while flying in RVSM airspace that affects your RVSM legality, then you must advise ATC right away. You may not have to descend, but the airspace ATC uses around you will reflect your reduced reliability/capability.

Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!
User currently offlineBruce From United States of America, joined May 1999, 5099 posts, RR: 13
Reply 4, posted (11 years 3 months 2 weeks 3 days 3 hours ago) and read 3101 times:

I thought NWA isn't flying the -10 anymore??????


Bruce Leibowitz - Jackson, MS (KJAN) - Canon 50D/100-400L IS lens
User currently offlineGoBoeing From United States of America, joined Jun 2000, 2834 posts, RR: 14
Reply 5, posted (11 years 3 months 2 weeks 3 days ago) and read 3073 times:

There may or may not be one or two DC-9-10s still around. If there is one or two remaining they are not and will not be certified to fly in RVSM airspace.


User currently offlineArgonaut From UK - Scotland, joined Dec 2004, 424 posts, RR: 1
Reply 6, posted (11 years 3 months 1 week 6 days 1 hour ago) and read 2906 times:

It's likely it has to do with the age of the aircraft (by now most series 10s are at least 35 years old, with airframe hours to match). To prolong the fatigue life of the airframe, the permitted cabin pressure differential may have been reduced; in turn, this would restrict the aircraft's operating ceiling. I know such limitations have been imposed on other aircraft types as they reached high hours and cycles.

The RVSM airspace explanation is certainly another possibility. In either case, the DC-9-10 is unlikely to be the only type affected, as there are plenty of elderly and old-technology aircraft still in service.


'the rank is but the guinea stamp'
User currently offlineNwafflyer From United States of America, joined Jul 2004, 1050 posts, RR: 2
Reply 7, posted (11 years 3 months 1 week 5 days 19 hours ago) and read 2860 times:

Tonight, I was on a dc-9 out of FNT to DTW -- miserable weather, de-iced in FNT, then we were in the air close to 1 1/2 hours, landed on a very slippery runway in DTW (kudo's to the captain, beautiful landing). Then, another dc-9 to IND -- de-iced in DTW again, sorry, I don't remember the take off because I fell asleep, but I've been on many dc-9's at 36,000 feet (not the 10, granted)

User currently offlineTiger119 From United States of America, joined Sep 2003, 1919 posts, RR: 0
Reply 8, posted (11 years 3 months 1 week 3 days 15 hours ago) and read 2757 times:

Quoting Nwafflyer (reply 7):
-- de-iced in FNT, then we were in the air close to 1 1/2 hours, landed on a very slippery runway in DTW

- An hour and a half flight from Flint to Detroit? What kind of routing? Via Cleveland?  Wink/being sarcastic

Flying is the second greatest thrill known to mankind, landing is the first!
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