I was just about to post asking Paul Traina “WHAT Garmin SBs?”, when today’s mail brought an envelope from Cirrus with a few Service Advisories, including references to the Garmin Service Bulletins.
[Paul - I haven’t checked yet, but it seems to me that this upgrade will have to be done by an avionics shop.]
The SA that got my attention was the one on Glareshield Deformation, because of the last paragraph:
Under elevated ambient temperatures, the aircraft should be hangared or a suitable sunshield be used to protect the glareshield. If the airplane must be parked in the open without a sunshield, cover the glareshield with a white or light colored cloth or paper and park the airplane so that the windshield is away from the sun.
Well, this sounds reasonable, and as far as I know, it is good advice for any airplane. However, in the Cirrus Design Maintenance Manual, Section 12-20, Page 10, you will find the following:
Never use… household window cleaning sprays… to clean windows or windshields… (yada yada yada) * Never use sun shades or allow sunvisors to remain in the lowered position when the airplane is parked in direct sunlight or crazing and the formation of bubbles may occur.*
OK… it took me a while, but eventually I realized that this is not necessarily a contradiction. The SA Caution does not say to put the sunshield on the window - it says to put it on the glareshield. HOWEVER, I am now the proud owner of $180 worth of apparently taboo Kennon sunshields. Is anyone else in the same boat?
As long as I’m warning… be careful with your Bruce’s Cover. Some have a problem with color fastness, and will stain the paint on your baby if it gets rained on while the cover is in place. It hasn’t happened to me, but I know someone who had to go through a lot to get the stains out. As far as I know, Bruce did all the right things, offering to shoulder the cost of correcting the situation, providing a new cover, and (I think) even crediting the entire cost of the original cover; but if you’re in doubt, check with Bruce before you tie-dye your Cirrus.