Summary
We propose to supersede Airworthiness Directive (AD) 2007-11- 13, which applies to all The Boeing Company Model 717-200 airplanes. AD 2007-11-13 currently requires revising the Airworthiness Limitations Section (ALS) of the Instructions for Continued Airworthiness to incorporate new removal limits for certain components of the flap system and to reduce the inspection interval s for fatigue cracking of principal structural elements (PSE). Since we issued AD 2007-11-13, a new Airworthiness Limitations Instructions (ALI) revision was released that incorporates nondestructive inspection (NDI) techniques and reduced repetitive inspection intervals for three PSEs. We have determined that these reduced intervals are necessary to address the unsafe condition. This proposed AD would require revising the maintenance or inspection program, as applicable, to incorporate reduced intervals for the inspections for three PSEs and add NDI techniques to the inspection process. We are proposingthis AD to detect and correct fatigue cracking of certain PSEs. Such cracking could adversely affect the structural integrity of the airplane.