Summary
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to all EMBRAER Model ERJ 170-100 LR, -100 SE, -100 STD, and -100 SU airplanes; and Model ERJ 190-100 IGW, -100 LR, and -100 STD airplanes. The existing AD currently requires revising the Limitations section of the airplane flight manual (AFM) to prohibit the flightcrew from moving the throttle into the forward thrust range immediately after applying the thrust reverser. This proposed AD would add additional airplanes to the applicability and would require the AFM revision for those additional airplanes. For certain airplanes, this proposed AD would also require installing new, improved full-authority digital engine-control (FADEC) software. This proposed AD results from a report that, during landing, the thrust reverser may not re-stow completely if the throttle lever is moved into the forward thrust range immediately after the thrust reverser is applied. We are proposing this AD to prevent theflightcrew from performing a takeoff with a partially deployed thrust reverser, which could result in reduced controllability of the airplane.