Missing altimeter setting, no approach right?
01-24-2011, 06:38 PM
#11
Gets Weekends Off
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SoCal controls BUR, LAX, VNY, SNA, etc. If an altimeter is missing for any of those airports and they happen to give you one from another field, that doesn't necessarily mean you are legal to shoot the approach.
01-24-2011, 06:54 PM
#12
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The source of the altimeter information comes from either a human or automated weather observation for that airport. The facility you reference is the controlling ATC for that airport, kind of an apples and oranges comparison.
SoCal controls BUR, LAX, VNY, SNA, etc. If an altimeter is missing for any of those airports and they happen to give you one from another field, that doesn't necessarily mean you are legal to shoot the approach.
SoCal controls BUR, LAX, VNY, SNA, etc. If an altimeter is missing for any of those airports and they happen to give you one from another field, that doesn't necessarily mean you are legal to shoot the approach.
http://204.108.4.16/d-tpp/1101/00022IL31.PDF
Now if you are talking about SoCal specifically then I assume that there would be some airports where the same would be true, though the airports in the LA basin might not have an example.
USMCFLYR
01-24-2011, 08:22 PM
#13
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Thread Starter
Joined APC: Jul 2010
Posts: 247
Thanks guys.
Thanks man. Do you happen to know which reg this might be found in? I'm having trouble finding it.
Matt
Yes, unless it's an emergency. In that case you could use a nearby altimeter setting (from ATIS, ASOS, or ATC) and add an appropriate safety buffer to the MDA.
If you are using an ILS in an emergency you can check the altimeter setting you are using by comparing your indicated altitude at the OM with the published altitude.
If you are using an ILS in an emergency you can check the altimeter setting you are using by comparing your indicated altitude at the OM with the published altitude.
Matt
01-24-2011, 08:32 PM
#14
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01-25-2011, 02:47 PM
#15
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Joined APC: Oct 2009
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The only Part 91 regulation pertaining to Altimeter Settings at all is ...
§ 91.121 Altimeter settings.
(a) Each person operating an aircraft shall maintain the cruising altitude or flight level of that aircraft, as the case may be, by reference to an altimeter that is set, when operating—
(1) Below 18,000 feet MSL, to—
(i) The current reported altimeter setting of a station along the route and within 100 nautical miles of the aircraft;
(ii) If there is no station within the area prescribed in paragraph (a)(1)(i) of this section, the current reported altimeter setting of an appropriate available station; or
(iii) In the case of an aircraft not equipped with a radio, the elevation of the departure airport or an appropriate altimeter setting available before departure; or (above 18,000)
With that being said, Chapter 5 (ATC Procedures) in the AIM and/or the FAA Instrument Procedure Handbook may have some guidance on this topic, unfortunately my time is limited tonight so I will have to look tomorrow.
Hope this helps
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