GFC 500 Autopilots with Electronic Stability and Protection installed under Part 23 AML STC (STC SA01866WI, Master Drawing List, Revisions 1 through 37) in the Textron Aviation (Cessna) Model 172 are affected.
AML STC SA01866WI
MANDATORY: Compliance with this STC service bulletin is mandatory at the next 100-hour/annual inspection, not to exceed 6 months.
During certain aircraft operating conditions, the co-pilot side main rudder cable becomes slack and may fall below parts of the electrical connector for the pitch servo. When the cable tension returns, the cable may remain under one of the electrical connector screws.