The International Cessna^® 170 Association

Just received a "Special Airworthiness Information Bulletin" from the FAA regarding a new SB from Unison (maker of Slick mags). Some users are experiencing premature carbon brush wear that may require inspection depending on serial number or date of overhaul. The full SB is viewable at:
http://www.qualityaa.com/SB3-08_Carbon_Brush.pdf