Re: PHL-NRT Under ETOPS 180

Date:         09 Dec 97 03:54:22 
From:         kls@ohare.Chicago.COM (Karl Swartz)
Organization: Chicago Software Works, Menlo Park, California
References:   1
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>The U.S. Gov't has been reported as negotiating rights with Japan for US
>Airways to serve NRT.  It would presumably do so from PHL.  Since US
>Airways only has, and is only likely to acquire, two engined aircraft, can
>they use such an airplane (777 or A330) to fly PHL-NRT under ETOPS 180?

They could even do it with 120 minute ETOPS rules.  See

   http://www.chicago.com/cgi-bin/gc?PATH=PHL-NRT&ETOPS=120

Once you get past eastern Canada, where there are plenty of alternate
airports, the key alternates are as follows:

   YZF    Yellowknife, NT, CA
   FAI    Fairbanks, AK, US
   PASY   Shemya AFB, AK, US
   UHPP   Petropavlosk-Kamchatsky, RA

See

   http://www.chicago.com/cgi-bin/gc?PATH=PHL-NRT&RANGE=120min@(YZF,FAI,PASY,UHPP,NRT)&RANGE-STYLE=outline

If Shemya is unavailable, PACD (Cold Bay, AK, US) can be substituted
with a minimal deviation from the great circle route.  With 180 minute
ETOPS, this deviation is unnecessary, and there's considerable padding
to compensate for the strong northern winds.

--
Karl Swartz	|Home	kls@chicago.com
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