Airworthiness Directive · Amendment 39-9906 · Embraer - Empresa Brasileira de Aeronautica S.A. Airplanes
Embraer - Empresa Brasileira de Aeronautica S.A. Airplanes
This AD applies to Embraer - Empresa Brasileira de Aeronautica S.A. EMB-120, EMB-120ER, EMB-120RT.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-120 series airplanes, that requires repetitive inspections to detect cracks in the wing rib-to-skin support brackets (shear clips), and replacement of cracked brackets with new or serviceable brackets. This amendment also requires the eventual replacement of certain brackets with new brackets, which terminates the requirement for the inspections. This amendment is prompted by reports of cracks in certain wing rib-to-skin support brackets in both the lower and upper skin of the wings. The actions specified by this AD are intended to prevent cracking of those support brackets, which can subsequently lead to the loosening of the rivets in the wing skin, leakage of fuel through the rivet holes, and, ultimately, the reduction of the structural integrity of the wing.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
