American Eagle Airlines

This NPRM states in paragraph (g)(3) “…apply corrosion inhibitor compound, in accordance with the applicable Bombardier modification summary package…Applying corrosion inhibitor compound is a terminating action for the requirements of this AD.” <br/><br/> In service ModSum No. IS67052110074 Rev. A1 states in step 8. “Close-out inner skin (REF: Drawing 601R31902 and Drawing 601R31702).” This drawing specifies certain rivets to be installed. <br/><br/> It is American Eagle Airline’s perception that if the next nominal fastener is required, an alternate method of compliance (AMOC) must be obtained. If this is the case, there is a potential for several AMOC’s being required to complete this modification since this modification involves drilling out and reinstalling a large number of fasteners. <br/><br/> AEA requests the proposed AD include provisions for oversized rivets and/or repairs for the inner skin when required. This will reduce the number of AMOC's required and increase efficiency when accomplishing this modification. <br/><br/> If you have any questions, please let me know. Thank you.