low altimeter and FL180

"Peter Duniho" wrote in message
...
"Robert Lyons" wrote in message
...

- Why would this problem affect just FL180 and FL200? Why not FL160,
220,
and every other altitude?

It affects all flight above FL180. There is no "FL160" in the US, and I'm
not sure why you got the impression that flights at FL220 are unaffected.

It'd have to be a hell of a depression to affect FL220 though. The table in
the relevant regulation (14CFR91.121) doesn't allow for such sucky weather.

-- David Brooks

No intrusion, just a great question. Keep reading ...and posting.

Now you have the info others have (links). These resources are free online,
or you can buy a printed FAR/AIM 2004 book for under $20.

http://www1.faa.gov/ATPubs/AIM/index.htm
Aeronautical Information Manual
Official Guide to Basic Flight Information and ATC Procedures

http://www.landings.com/evird.acgi$pass*58241480!_h-www.landings.com/_landings/pages/regulations.html#aim
Federal Aviation Regulations

or

http://makeashorterlink.com/?L2EF42F56
(Same as long link above. Wait a few seconds for it)

These are from Landings.com. You can also get them from the FAA website.

--
Montblack
"Just the usual inanity"


("Robert Lyons" wrote)
I hope you'll forgive the intrusion from a lurker and non-pilot (well,
a wannabe-pilot). Would someone please explain a few points about this
to me?

I don't have any reference books mentioned in another post, so cannot
look up these answers myself. Thanks for any light you can shed.

"Ron Natalie" wrote in message
m...

To put it another way, flight levels don't exist below the transition
altitude
(18,000 Feet MSL In the US). If FL180 would be at 16950, it's not
available.

Is there a similar regulation in countries with lower transition altitudes?
On a really high pressure day, could you be cleared from 2,000ft to FL000?

-- David Brooks

AIM Section 7 Chapter 2

"Michael 182" wrote in message
news:V3Bnb.36695$mZ5.183695@attbi_s54...
Was flying in the Denver area today and approach told a plane that FL 180
was unavailable die to low altimeter, which was 28.87 at the time. What is
the reason for this? Confusion with 29.92 readings?

Thanks,

Michael