Airworthiness Directives; Boeing Model 737-100, -200, -200C, -300, -400, and -500 Series Airplanes

The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. This AD requires examining the airplane's maintenance records to determine if the main landing gear (MLG) has been overhauled and if Titanine JC5A (also known as Desoto 823E508) corrosion- inhibiting compound ("CIC") was used during the overhaul. For airplanes for which the maintenance records indicate that further action is necessary, or for airplanes on which CIC JC5A may have been used during manufacture, this AD requires a one-time detailed inspection for discrepancies of certain components of the MLG, and corrective action if necessary. This AD results from twelve reports of severe corrosion on one or more of three components of the MLG. We are issuing this AD to prevent collapse of the MLG, or damage to hydraulic tubing or the aileron control cables, which could result in possible departure of the airplane from the runway and loss of control of the airplane.