Airworthiness Directive · Amendment 39-13599 · Boeing Model 747 Series Airplanes
Boeing Model 747 Series Airplanes
Superseded. A later AD replaced this one: AD 2007-19-16. Comply with the one in force.
Model 747 series airplanes, certificated in any category, with lower cargo floors (floors in the lower cargo areas) that are not fully enclosed. A fully enclosed cargo floor is a floor with panels installed between all roller trays in the cargo compartment. A cargo floor that is not fully enclosed is a floor without panels installed between all roller trays in the cargo compartment.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes. This AD requires a one-time inspection of the potable water and drain lines in the forward and aft cargo compartments for indications of overheating of the heater tape, exposed foam insulation, missing or damaged protective tape, or debris around the potable water fill and drain lines; and corrective action, if necessary. This action is necessary to prevent overheating of the heater tape on potable water fill and drain lines, which may ignite accumulated debris or contaminants on or near the potable water fill and drain lines, resulting in a fire in the airplane. This action is intended to address the identified unsafe condition.
