Coolant Fluid Bulletin - Sep 2005

ROTAX OWNERS CAUTIONED ABOUT USING IMPROPER COOLANT
The FAA has issued a special airworthiness information bulletin (SAIB) to=20
alert owners and operators of Bombardier-Rotax

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Date:         Fri, 2 Sep 2005 08:52:31 -0400
Reply-To:     Ximango Owners Group <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       Ximango Owners Group <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Ted Gordon <tedjgordon@ATT.NET>
Subject:      Coolant Fluid Bulletin
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
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Today's AOPA newsletter carried a paragraph about a new FAA bulletin about=20
the Rotax coolant fluid change to Evans waterless coolant:

"ROTAX OWNERS CAUTIONED ABOUT USING IMPROPER COOLANT
The FAA has issued a special airworthiness information bulletin (SAIB) to=20
alert owners and operators of Bombardier-Rotax 912 A, 912 F, 912 S, and=20
914 F series engines about using the proper type of coolant. Using the=20
improper type of coolant can result in a loss of coolant and overheating=20
when the engine is operated at cylinder head temperatures above 120 C,=20
said the FAA. The affected engines are installed on certificated airplanes=20
like the Diamond DA-20 and on many experimental and light sport airplanes.=20
For complete information, download the SAIB."

The download is at http://download.aopa.org/epilot/2005/saibne0584.pdf .=20
It says (in part):

"This is information only. Recommendations aren=92t mandatory."

My reading of the bulletins says the use of water/glycol is acceptable if=20
the CHT remains below 120 degree C (248 degrees F) and a 1.2 bar pressure=20
cap is used.  Use of the Evans coolant gives a higher premissible=20
operating temparture.

Ted Gordon

=20
=========================================================================
Date:         Fri, 2 Sep 2005 09:19:30 -0400
Reply-To:     Ximango Owners Group <XIMANGO@HOME.EASE.LSOFT.COM>
Sender:       Ximango Owners Group <XIMANGO@HOME.EASE.LSOFT.COM>
From:         Bruce Schimmel <bruce@SCHIMMEL.COM>
Subject:      Re: Coolant Fluid Bulletin
In-Reply-To:  <LISTSERV%200509020852313800.999D@HOME.EASE.LSOFT.COM>
Mime-Version: 1.0 (Apple Message framework v622)
Content-Type: text/plain; charset=WINDOWS-1252; format=flowed
Content-Transfer-Encoding: quoted-printable

Here's is how I read the Coolant Fluid Bulletin:

--  If CHT temps exceed 120 deg during normal operations, then you've=20
got to change cooling fluids.

--  If CHT temps do not exceed 120 deg during normal ops, then you've=20
got to:
    1. Use a 50-50 glycol/water mixture.
    2. Confirm that the open-up pressure cap is marked 1.2 bar.  If =
not,=20
replace.

Finally, all aircraft manuals must be changed to reflect a revised set=20=

of  coolant limits.

Two questions:
1. have i got this right?
2. does your ximango exceed 120. (I haven't checked formally. But the=20
CHT in my pre-"S" 912, seem never to move off-center.)

BTW, I remember reading or hearing that if a Ximango 200 Pre-"S" looses=20=

coolant, just throttle back to 65%. Anyone else recall that?

--Bruce



If, during normal operations,
On Sep 2, 2005, at 08:52, Ted Gordon wrote:

> Today's AOPA newsletter carried a paragraph about a new FAA bulletin=20=

> about
> the Rotax coolant fluid change to Evans waterless coolant:
>
> "ROTAX OWNERS CAUTIONED ABOUT USING IMPROPER COOLANT
> The FAA has issued a special airworthiness information bulletin (SAIB)=20=

> to
> alert owners and operators of Bombardier-Rotax 912 A, 912 F, 912 S, =
and
> 914 F series engines about using the proper type of coolant. Using the
> improper type of coolant can result in a loss of coolant and=20
> overheating
> when the engine is operated at cylinder head temperatures above 120 C,
> said the FAA. The affected engines are installed on certificated=20
> airplanes
> like the Diamond DA-20 and on many experimental and light sport=20
> airplanes.
> For complete information, download the SAIB."
>
> The download is at http://download.aopa.org/epilot/2005/saibne0584.pdf=20=

> .
> It says (in part):
>
> "This is information only. Recommendations aren=92t mandatory."
>
> My reading of the bulletins says the use of water/glycol is acceptable=20=

> if
> the CHT remains below 120 degree C (248 degrees F) and a 1.2 bar=20
> pressure
> cap is used.  Use of the Evans coolant gives a higher premissible
> operating temparture.
>
> Ted Gordon
>
>
>