Thrush Wing Spar AD 2009-26-11 Are you clear with compliance?
AD 97-13-11 was issued to address an unsafe condition and accident caused by fatigue cracks occurring in the lower spar caps. AD 97-13-11 was superseded by AD 97-17-03, AD 2000-11-16, AD 2003-07-01, AD 2006-07-15, and AD 2009-26-11. AD 2009-26-11 requires repetitive inspection of the 1/4-inch and 5/16-inch bolt hole areas on the wing front lower spar caps for fatigue cracking, repair or replacement of any wing front lower spar cap where fatigue cracks are found, and replacement of the wing front lower spar caps when a life limit is reached. Prior to or after wing front lower spar cap replacement