Aspen at night

wrote:

Tim, is the US possible going to accept the Panops method of allowing
the application of climb gradients to missed approach segments? After
all, we're expected to be able to perform this ** sterling,
uninterrupted climb performance ** that you mention, on a departure
anyway. So to apply a missed approach gradient requirement when an
aircraft is generally lighter than on departure would be something a
lot of aircraft would be able to execute. Of course, I realize that
those in power would bring up many other issues, but it works in
Europe, and Burbank in Calif already seems to have a waiver for a
gradient greater than 2.5%

Or is Netjets talking less obstacle clearance than present RNAV (gps
or waas) approaches.

Stan

There is no comparable "sterling" climb gradient requirement at ASE,
because there are no Runway 15 departures. ;-)

The 950 feet per mile for Runway 33 is rather "sterling" to say the least.

As to climb gradients on missed approach procedures, historically the
FAA has been committed to the 40:1, particularly because of the vast
number of low-performance light aircraft conducting IFR ops in this country.

Burbank was driven by airline politics many years ago. It is a nominal
situation compared to some of the ICAO stuff.

The industry/FAA group (the PARC) that is working the emerging RNP
criteria has already approved missed approach climb gradients of up to
400 feet per mile on RNAV (RNP) SAAAR IAPs. The new IAP at KSUN has a
climb gradient as does one of the new PSP RNP IAPs.

The PARC has yet to work through non-SAAAR RNAV (RNP) IAP criteria. The
issue of climb gradients will be debated again because light aircraft
will use these procedures. As a practical matter, the SAAAR procedures
are limited to advanced biz jet and airliners, that have no issue with a
climb gradient of 400 feet per mile, or less.

And, with RNP a lot of the climb gradient issues are avoided by using
RNP missed approach areas (avoiding terrain to the sides). But, RNP in
the missed approach requires the most demanding equippage so RNP can be
sustained in the event of a loss of GPS. Thus far, only the KSUN RNP
IAP has an RNP requirement for the missed approach.