Superseded. This AD was superseded by AD 2016-16-13. Verify which one applies to your serial and effectivity before any maintenance action.
AD 2016-13-10
Effective 08/09/2016 · Published 07/05/2016
Airworthiness Directives; The Boeing Company Airplanes
Summary
We are superseding Airworthiness Directive (AD) 2012-12-04, for certain The Boeing Company Model 737-300, -400, and -500 series airplanes. AD 2012-12-04 required repetitive external detailed inspections and nondestructive inspections to detect cracks in the fuselage skin along the chem-mill steps at stringers S-1 and S-2R, between station (STA) 400 and STA 460, and repair if necessary. This new AD requires a prevent…