Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Sat, 15 Nov 2003 23:10:23 -0500 Message-ID: X-Original-Return-Path: Received: from [65.32.5.134] (HELO ms-smtp-04.tampabay.rr.com) by logan.com (CommuniGate Pro SMTP 4.1.7) with ESMTP id 2740002 for lml@lancaironline.net; Sat, 15 Nov 2003 21:40:40 -0500 Received: from 34025820001 (199.240.95.24.cfl.rr.com [24.95.240.199]) by ms-smtp-04.tampabay.rr.com (8.12.10/8.12.7) with SMTP id hAG2eah6001862 for ; Sat, 15 Nov 2003 21:40:37 -0500 (EST) X-Original-Message-ID: <006601c3abeb$1b215760$c7f05f18@34025820001> From: "Charlie Kohler" X-Original-To: "LancairList" Subject: Ice X-Original-Date: Sat, 15 Nov 2003 21:41:15 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0063_01C3ABC1.32017520" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0063_01C3ABC1.32017520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Recently, I wrote the EAA and asked if there was any specific guidance = they knew of regarding icing equipment for flight into "known ice" for = experimental airplanes. The requirements are all in Part 23--but that = doesn't apply to experimental aircraft.=20 Everyone knows that we should stay out of ice, but what about that case = when you want to go through layer climbing to cooler air on top, or = descending through layer into warmer air. Known ice?? Are we in = violation? What ARE the rules? Having researched the subject myself, I find myself in complete = agreement with Joe Norris in his first paragraph. After = that----------------. Anyone else have any ideas? Charlie K. -------------------------------------------------------------------------= -------------------------------------------------------------------------= --------------------------- "Hello Charlie, There is no specific guidance pertaining to amateur-built aircraft = certification for flight into known icing. This is no doubt due to the = fact that 14 CFR Part 91 does not specifically prohibit fight into known = icing. In fact, other than regulations that apply to large and = turbojet-powered aircraft (specifically mentioned in 91.527) icing isn't = mentioned in Part 91 at all. There are regulations applicable to flight = into known icing found in Parts 121 and 135, but amateur-built aircraft = cannot be operated under these regulations, so these won't apply to your = Lancair. There is specific guidance on certification of Part 23 = (type-certificated) aircraft for light into known icing. Guidance on = this procedure can be found in FAA advisory circular AC 23.1419-2B, as = well as other references. While this guidance does not directly apply = to amateur-built aircraft, it may be used as general guidance should you = decide to equip your aircraft with icing protection. Some items to be = considered, as called out in AC 23.1419-2B, include the following: (1) Leading edges of wings, winglets, and wing struts; horizontal and = vertical stabilizers; and other lifting surfaces; (2) Leading edges of control surface balance areas if not shielded; (3) Accessory cooling air intakes that face the airstream and/or could = otherwise become restricted due to ice accretion; (4) Antennas and masts; (5) Fuel tank vents; (6) External tanks, including fuel tip tanks; (7) Propellers; (8) External hinges, tracks, door handles, and entry steps; (9) Instrument transducers including pitot tube (and mast), static = ports, angle-of-attack sensors, and stall warning transducers; (10) Forward fuselage nose cone and radome; (11) Windshields; (12) Landing gear; (13) Retractable forward landing lights; (14) Ram air turbines; (15) Ice detection lights if required; and (16) Any other external protuberance. Other guidance on the certification of Part 23 aircraft for flight into = known icing can be found at the following web site: http://www2.faa.gov/certification/aircraft/aceIcePart23.htm Scroll down the page until you see 23.1419 in the left-hand column. = This is the regulation on ice protection. Applicable references are = listed in that area of the web page. Another advisory circular which would be of use to you is AC 20-73A, = which talks about testing procedures used to verify the safety of ice = protection systems. Such things as testing methods, ice shedding, = holding in icing conditions, and other safety-related issues are = discussed in this AC. On another subject, installing ice protection equipment on your aircraft = will constitute a major change, which must be approved in accordance = with the procedures called out in your aircraft's operating limitations. = make sure you check your operating limitations to verify what procedure = applies to your aircraft, and proceed as directed. Depending on when = your aircraft was originally licensed, this may or may not involve = contacting your area FAA Flight Standards District Office (SOD) in order = to get written authorization for the change. And even if SOD contact is = not required, you will be required to test the major change in order to = verify that it does not present an unsafe operating condition. In the = case of ice protection equipment, the FAA may very well take the = position that testing in accordance with the procedures outlined in the = above-mentioned advisory circulars is the appropriate way to test such a = modification. Another consideration is insurance coverage. Before spending the time = and money to install the ice protection equipment, I would suggest that = you call your insurance underwriter and make sure they will cover = operations of your aircraft in known icing conditions. I hope this has given you some feel for what must be considered when = contemplating the installation of ice protection equipment on your = aircraft." Joe Norris EAA Aviation Information Services EAA Aviation Center, Oshkosh, WI 888-322-4636, extension 6806 jnorris@eaa.org=20 ------=_NextPart_000_0063_01C3ABC1.32017520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Recently, I wrote the EAA and asked if = there was=20 any specific guidance they knew of regarding icing equipment for flight = into=20 "known ice" for experimental airplanes. The requirements are all in Part = 23--but=20 that doesn't apply to experimental aircraft. 
 Everyone knows that we should = stay out of=20 ice, but what about that case when you want to go through layer climbing = to=20 cooler air on top, or descending through layer into warmer air.  = Known=20 ice?? Are we in violation?   What ARE the rules?
 
 Having researched the subject = myself, I find=20 myself in complete agreement with Joe Norris in his first = paragraph. =20 After that----------------.  Anyone else have any = ideas?
Charlie K.
----------------------------------------------------------------= -------------------------------------------------------------------------= ------------------------------------
"Hello = Charlie,
 
There = is no specific=20 guidance pertaining to amateur-built aircraft certification for flight = into=20 known icing.  This is no doubt due to the fact that 14 CFR Part 91 = does not=20 specifically prohibit fight into known icing.  In fact, other than=20 regulations that apply to large and turbojet-powered aircraft = (specifically=20 mentioned in 91.527) icing isn't mentioned in Part 91 at all.  = There are=20 regulations applicable to flight into known icing found in Parts 121=20 and 135, but amateur-built aircraft cannot be operated under these=20 regulations, so these won't apply to your Lancair.
 
There is=20 specific guidance on certification of Part 23 (type-certificated) = aircraft for=20 light into known icing.  Guidance on this procedure can be found in = FAA=20 advisory circular AC 23.1419-2B, as well as other references.  = While this=20 guidance does not directly apply to amateur-built aircraft, it may be = used as=20 general guidance should you decide to equip your aircraft with icing=20 protection.  Some items to be considered, as called out in AC = 23.1419-2B,=20 include the following:
 
(1) Leading edges of = wings,=20 winglets, and wing struts; horizontal and vertical stabilizers; and other lifting=20 surfaces;
(2) Leading edges of = control surface=20 balance areas if not shielded;
(3) Accessory = cooling air intakes=20 that face the airstream and/or could otherwise=20 become restricted due to ice accretion;
(4) Antennas and = masts;
(5) Fuel tank = vents;
(6) External tanks, = including fuel tip=20 tanks;
(7) = Propellers;
(8) External hinges, = tracks, door=20 handles, and entry steps;
(9) Instrument = transducers=20 including pitot tube (and mast), static ports, angle-of-attack sensors, and stall warning=20 transducers;
(10) Forward fuselage nose = cone and=20 radome;
(11) = Windshields;
(12) Landing = gear;
(13) Retractable forward = landing=20 lights;
(14) Ram air = turbines;
(15) Ice detection lights = if required;=20 and
(16) Any other external=20 protuberance.
 
Other=20 guidance on the certification of Part 23 aircraft for flight into known = icing=20 can be found at the following web site:
 
http= ://www2.faa.gov/certification/aircraft/aceIcePart23.htm=
 
Scroll=20 down the page until you see 23.1419 in the left-hand column.  This = is the=20 regulation on ice protection.  Applicable references are listed in = that=20 area of the web page.
 
Another=20 advisory circular which would be of use to you is AC 20-73A, which talks = about=20 testing procedures used to verify the safety of ice protection = systems. =20 Such things as testing methods, ice shedding, holding in icing = conditions, and=20 other safety-related issues are discussed in this = AC.
 
On=20 another subject, installing ice protection equipment on your aircraft = will=20 constitute a major change, which must be approved in accordance with the = procedures called out in your aircraft's operating limitations.  = make sure=20 you check your operating limitations to verify what procedure applies to = your=20 aircraft, and proceed as directed.  Depending on when your aircraft = was=20 originally licensed, this may or may not involve contacting your area = FAA Flight=20 Standards District Office (SOD) in order to get written authorization = for the=20 change.  And even if SOD contact is not required, you will be = required to=20 test the major change in order to verify that it does not present an = unsafe=20 operating condition.  In the case of ice protection equipment, the = FAA may=20 very well take the position that testing in accordance with the = procedures=20 outlined in the above-mentioned advisory circulars is the appropriate = way to=20 test such a modification.
 
Another=20 consideration is insurance coverage.  Before spending the time and = money to=20 install the ice protection equipment, I would suggest that you call your = insurance underwriter and make sure they will cover operations of your = aircraft=20 in known icing conditions.
 
I hope=20 this has given you some feel for what must be considered when = contemplating the=20 installation of ice protection equipment on your=20 aircraft."

Joe=20 Norris
EAA Aviation Information Services
EAA Aviation Center, = Oshkosh,=20 WI
888-322-4636, extension 6806
jnorris@eaa.org
 
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