Airworthiness Directive · Amendment 39-18402 · Wings
The Boeing Company Airplanes
The Boeing Company Model 787-8 airplanes, certificated in any category, having line numbers 78 and 82.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This AD requires revising the maintenance or inspection program, as applicable, to include an airworthiness limitation for repetitive inspections of the web fastener holes in the overwing flex-tees. This AD was prompted by a report that certain web fastener holes in the overwing flex-tees at the wing-to- body interface might not have been deburred properly when manufactured. Fastener holes without the deburr chamfer applied can develop fatigue cracking. We are issuing this AD to detect and correct cracking in the web fastener holes in the overwing flex-tees, which can weaken the primary wing structure so it cannot sustain limit load.
Within 30 days after the effective date of this AD, revise the maintenance or inspection program, as applicable, to incorporate the applicable inspection requirement identified in paragraphs (g)(1) and (g)(2) of this AD, as specified in Boeing 787 Airworthiness Limitations—Line Number Specific, D011Z009-03-02, dated February 2015. The initial compliance time for the tasks is at the applicable time specified in Boeing 787 Airworthiness Limitations—Line Number Specific, D011Z009-03-02, dated February 2015.
(1) For the airplane having line number 78: Principal Structural Element 57-10-06a_MRB9, “Overwing Flex-Tee—Web Fastener Holes.”
(2) For the airplane having line number 82: Principal Structural Element 57-10-06a_MRB10, “Overwing Flex-Tee—Web Fastener Holes.”
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
