Ameriflight, LLC

AMERIFLIGHT, LLC ∙ 4700 EMPIRE AVENUE, HANGAR 1, BURBANK, CA 91505 ∙ 818 847 0000 Response to Docket No. FAA-2009-0715 Due to the critical nature of an APU mounting rod failure due to corrosion we agree that the 500 hour or two months initial inspection time after the effective date of the proposed AD is an acceptable time frame. The repeat inspection at 1500 flight hours or 6 months is adding an additional inspection item outside the scope of the Embraer EMB120 Maintenance Review Board Document (MRB). Due to the fact that all of the corrosion control and corrosion prevention items contained in the MRB are calendar driven it would seem relevant to have the repeat APU mounting rod corrosion inspection time interval come due at a calendar limit rather than on an hourly basis. The MRB contains a 12 month inspection for the aircraft. The repeat inspection of the APU mounting rods should be completed at a 12 month time interval so it could be completed during the normal inspection cycle contained in the MRB. Patrick J. Kremer Director, Quality Control