AD 2012-22-01 Chafed fuel return line assemblies

SUMMARY: We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft
Company Models 172R and 172S airplanes. This AD was prompted by reports of chafed fuel return
line assemblies, which were caused by the fuel return line assembly rubbing against the right steering
tube assembly during full rudder pedal actuation. This AD requires you to inspect the fuel return line
assembly for chafing; replace the fuel return line assembly if chafing is found; inspect the clearance
between the fuel return line assembly and both the right steering tube assembly and the airplane
structure; and adjust as necessary. We are issuing this AD to correct the unsafe condition on these
products.