Re: Overheard on channel 9 ...

Date:         14 Jul 97 20:27:02 
From: (Mark Gitlitz)
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>>Recently, on a United flight, I was listening to channel 9 (cockpit
>>communications).  An airliner of unknown type was cleared to FL 410.  It
>>then requested that it be sent no higher that 390.  The controller asked
>>why: "don't you have the performance for 410?"  "Yes," came the reply,
>>"but not in the light chop that is reported there."
>>Could someone explain what was going on here?  Is FL 410 so close to the
>>service ceiling that a little chop (and presumably some gusts from the
>>rear) are problematic?

I was just talkiking about this with an AA Left Seat that was sitting
next to me on a DFW-BOS flight. At that altitude at least one of the
flight deck crew must be on Oxygen. Apparently, the mask is extremely
uncomfortable to wear, so........clearance to this altitude is
routinely declined (grin)!!!

Mark Gitlitz
EMC Corp
Hopkinton, MA
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