Airworthiness Directive · Amendment 39-15158 · Boeing Model 747-200B, 747-300, and 747-400 Series Airplanes
Boeing Model 747-200B, 747-300, and 747-400 Series Airplanes
Superseded. A later AD replaced this one: AD 2014-09-08. Comply with the one in force.
This AD applies to Boeing Model 747-200B, 747-300, and 747-400 series airplanes, certificated in any category; as identified in Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-200B, 747-300, and 747-400 series airplanes. This AD requires doing repetitive detailed inspections for cracking of the aft tension tie channels from body station (BS) 1120 to BS 1220 and from BS 880 to BS 1100, and corrective actions if necessary. This AD results from cracks found in the aft tension tie channels at four station locations, on a Model 747-200B series airplane that had been modified to a special freighter. We are issuing this AD to detect and correct cracking of the aft tension tie channels; failure of more than one tension tie could result in rapid depressurization of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
At the applicable times specified in paragraph 1.E. of Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007, except as provided by paragraph (g) of this AD: Do repetitive detailed inspections for cracking of the aft tension tie channels from body station (BS) 1120 to BS 1220 and from BS 880 to BS 1100, and do all applicable corrective actions, by accomplishing all of the applicable actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007, except as provided by paragraph (h) of this AD.
Where Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007, specifies counting the compliance time from “* * * after the date on this service bulletin,” this AD requires counting the compliance time from the effective date of this AD.
If any crack is found in a bolt hole during any inspection required by this AD, and Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007, specifies to contact Boeing for appropriate action: Before further flight, repair the crack using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
(i) Except as provided by paragraph (h) of this AD, accomplishing the applicable repairs or modifications at all tension tie locations, in accordance with Part 3 of the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2610, dated May 10, 2007, terminates the repetitive inspections required by paragraph (f) of this AD.
