Airworthiness Directive · Amendment 39-15648 · Boeing Model 707 Airplanes, and Model 720 and 720B Series Airplanes
Boeing Model 707 Airplanes, and Model 720 and 720B Series Airplanes
Superseded. A later AD replaced this one: AD 2009-18-10. Comply with the one in force.
This AD applies to Model 707-100 long body, -200, -100B long body, and -100B short body series airplanes; Model 707-300, -300B, -300C, and -400 series airplanes; and Model 720 and 720B series airplanes, certificated in any category; as identified in Boeing 707 Special Attention Service Bulletin 3524, dated July 18, 2007.
We are adopting a new airworthiness directive (AD) for certain Boeing Model 707 airplanes, and Model 720 and 720B series airplanes. This AD requires repetitive detailed inspections to detect cracks and corrosion on any existing repairs and at certain body stations of the visible surfaces of the wing to body terminal fittings including the web, flanges, and ribs; and applicable related investigative and corrective actions. This AD results from reports of cracks found in the wing to body terminal fittings during routine inspections. We are issuing this AD to prevent cracks and corrosion in the body terminal fittings, which could cause loss of support for the wing and could adversely affect the structural integrity of the airplane.
Comply with this AD within the compliance times specified, unless already done.
Within 24 months after the effective date of this AD, do detailed inspections and applicable related investigative and corrective actions, by accomplishing all the actions specified in the Accomplishment Instructions of Boeing 707 Special Attention Service Bulletin 3524, dated July 18, 2007, except as provided by paragraph (g) of this AD. Repeat the detailed inspections thereafter at intervals not to exceed 24 months. Do all applicable related investigative and corrective actions before further flight.
(g) If any crack or corrosion is found during any inspection required by paragraph (f) of this AD, and Boeing 707 Special Attention Service Bulletin 3524, dated July 18, 2007, specifies to contact Boeing for appropriate action: Before further flight, repair the terminal fittings using a method approved in accordance with the procedures specified in paragraph (i) of this AD.
Although Boeing 707 Special Attention Service Bulletin 3524, dated July 18, 2007, specifies to submit information to the manufacturer, this AD does not include that requirement.
