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Emergency Descent Rates Questions  
User currently offlineSTEINWAY From , joined Dec 1969, posts, RR:
Posted (13 years 1 month 1 week 5 days 19 hours ago) and read 3854 times:

Pilots, if you had to make an emergency descent from cruise level on ,say, a 737, to a nearby airport : what maximum descent rate could you have, would it change throughout the descent? if yes, crossing what flight levels? what maximum descent rate could you have below 10,000 feet? 5000?...

Also would you make use of speed brakes during this descent? From which altitude and down to which altitude?

Thank you.
Steinway


3 replies: All unread, jump to last
 
User currently offlineAAR90 From United States of America, joined Jan 2000, 3451 posts, RR: 47
Reply 1, posted (13 years 1 month 1 week 5 days 17 hours ago) and read 3807 times:

>...what maximum descent rate could you have....

"Could" seems to be the operative word in your question. All the airliners I've flow _can_ descend at much greater than 6,000 feet per minute (that's as high as the guages display). 10-12,000 fpm is probably a good high-end estimate. There are no standard altitudes as everything is dependent upon nature of emergency, condition of aircraft and terrain in local area.



*NO CARRIER* -- A Naval Aviator's worst nightmare!
User currently offlineIFF/7000 From , joined Dec 1969, posts, RR:
Reply 2, posted (13 years 1 month 1 week 5 days 8 hours ago) and read 3767 times:

1.Aircraft damaged or not? (speed)
2.Spoilers are used.
3.Descent to 10.000ft or min safe if higher.
4.Reduce rate at least 2000ft before level off and enter spoilers.
5.An emergency descent is usually performed because of (rapid) decompression so no need for emerg. desc. below 10.000ft.
6.IVSI out of scale must be around 10.000 (or more)ft/min.


User currently offlineSTEINWAY From , joined Dec 1969, posts, RR:
Reply 3, posted (13 years 1 month 1 week 1 day 23 hours ago) and read 3718 times:

Thanks for your answers

Steinway


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