Summary
The FAA proposes to adopt a new airworthiness directive (AD) for certain The Boeing Company Model 767-200, -300, and -400ER series airplanes. This proposed AD was prompted by a report of multiple engine indicating and crew alerting system messages during the potable water servicing for a Model 777 freighter airplane after the water leaked onto the electronics equipment cooling air filter. Since the Model 767 passenger airplanes are similar in design, we are issuing an AD against the Model 767 passenger airplanes. This proposed AD would require installation of hoseducts around the left-side section 43 potable water supply hoses and connections, a potable water system leakage test, and applicable corrective actions. The FAA is proposing this AD to address the unsafe condition on these products.