Summary
We propose to adopt a new airworthiness directive (AD) for certain Embraer S.A. Model ERJ 170 airplanes. This proposed AD was prompted by reports of ``BLEED 1(2) LEAK'' messages displayed on the Engine Indication and Crew Alert System (EICAS), and indirect damage to components of the Electrical Wiring Interconnection System (EWIS) in the engine pylon area. This proposed AD would require inspecting the EWIS components for damage, and repair if necessary. This proposed AD would also require installing pre-cooler deflectors on the left- and right-hand pylons, and applying silicone sealant. We are proposing this AD to prevent indirect damage to EWIS components near the engine bleed air pre-coolers, which could result in a dual engine roll back to idle and consequent dual engine power loss and reduced controllability of the airplane.