PRODUCT: Certain The Boeing Company Model 737-500 series airplanes. SUBJECT: Airworthiness Directive 2012-16-07 ACTION: Final Rule
SUMMARY: This AD was prompted by reports of chem-mill step cracking on the aft lower lobe fuselage skins. This AD requires inspections of the fuselage skin at the chem-mill steps, and repair if necessary. The FAA is issuing this AD to detect and correct cracking on the aft lower lobe fuselage skins, which could result in decompression of the airplane.