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Scott
Joined: 10 Jan 2006
Posts: 9
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 Posted: Tue Jan 24, 2006 3:49 pm Post subject: Pitot Heat Indicator Color? |
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I seem to remember a post quite a while back (years?) that suggested that
"Pitot Heat" (switch or annunciator) color was covered by an FAR. What
color was specified and where is the reg?
Thanks-
Scott Fifield
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Eric M. Jones
Joined: 10 Jan 2006
Posts: 565
Location: Massachusetts
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| Posted: Tue Jan 24, 2006 5:34 pm Post subject: Re: Pitot Heat Indicator Color? |
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For transport category aircraft....
Sec. 25.1326 - Pitot heat indication systems.
If a flight instrument pitot heating system is installed, an indication system must be provided to indicate to the flight crew when that pitot heating system is not operating. The indication system must comply with the following requirements:
(a) The indication provided must incorporate an amber light that is in clear view of a flight crewmember.
(b) The indication provided must be designed to alert the flight crew if either of the following conditions exist:
(1) The pitot heating system is switched "off".
(2) The pitot heating system is switched "on" and any pitot tube heating element is inoperative.
[Amdt. 25-43, 43 FR 10339, Mar. 13, 1978]
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_________________
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net |
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Bill Denton
Joined: 10 Jan 2006
Posts: 97
Location: Chicago, IL USA
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| Posted: Wed Jan 25, 2006 4:59 am Post subject: Pitot Heat Indicator Color? |
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Looking at my big old Cessna 182 panel poster from Sporty's...
The pitot heat switch is at the end of the bank of light switches, and is
exactly the same style (chrome toggle) and size. There doesn't appear to be
any sort of on/off indicator.
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Tdawson(at)avidyne.com
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| Posted: Wed Jan 25, 2006 5:24 am Post subject: Pitot Heat Indicator Color? |
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A few items of interest:
a) Cessna 182 was a grandfathered Type Certificate, and so was exempted from new FAA guidance on Pitot Heat annunciation.
b) The FAA had interpreted that Part 23 aircraft also required a Pitot Heat indication, and this can be found on newer designs. For instance, check out a Diamond DA40. Unfortunately, the rule was interpreted in a way that requires a "Pitot Off" indicator that is in your face ALL THE TIME unless its turned on.
c) That being said, there is new guidance that is just out or is coming out from the Small Airplane Directorate that this indication is excessive and not necessary. I don't know if they were going to delete the requirement, or change it in a way that makes more sense. (like sensing OAT, too)
d) Of course, for Experimental you don't have to follow that guidance if you don't want.
TDT
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Scott
Joined: 10 Jan 2006
Posts: 9
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| Posted: Wed Jan 25, 2006 1:57 pm Post subject: Pitot Heat Indicator Color? |
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Eric, Bill, and Tim, et al-
Thanks for the info on pitot heat indication requirements -- all helpful. I
am frequently impressed with the depth of knowledge available on this list.
-Scott Fifield, Glastar builder
do not archive
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