PRODUCTS AFFECTED:
All aircraft with the GFC 600 autopilot installed per STC SA01844WI using Master Drawing List (MDL) 005-01009-01 Revisions 1 through 6 are affected.
CERTIFICATION APPROVAL:
STC SA01844WI
COMPLIANCE:
Recommended: Compliance with this service bulletin is recommended at the next opportunity, not to exceed next annual maintenance check.
PURPOSE:
Increase the torque on the servo cable clamp nuts.