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

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We propose to adopt a new airworthiness directive (AD) for all Boeing Model 737-100, -200, -200C, -300, -400, and -500 series airplanes. For all airplanes, this proposed AD would require repetitive overhaul of the retract actuator beam of the main landing gear (MLG). For certain airplanes, this proposed AD would require repetitive inspections for damage of the retract actuator beam, and related investigative and corrective actions if necessary. This proposed AD results from reports of broken retract actuator beams of the MLG and the subsequent failure of the MLG to fully retract. We are proposing this AD to detect and correct broken retract actuator beams of the MLG, which could cause damage to the beam arm, hydraulic tubing, and flight control cables. Damage to the flight control cables could result in loss of control of the airplane.