Airworthiness Directive · Amendment 39-16965 · Fuselage
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, and 747SR series airplanes; certificated in any category; as identified in Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This AD requires inspections for scribe lines in affected lap and butt splices, wing-to-body fairing locations, and external repair and cutout reinforcement areas; and related investigative and corrective actions if necessary. This AD was prompted by reports of scribe lines found at lap joints and butt joints, around external doublers and antennas, and at locations where external decals had been cut. We are issuing this AD to detect and correct scribe lines, which can develop into fatigue cracks in the skin and cause sudden decompression 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 Tables 1 through 21 and Table 25 in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, except as provided in paragraph (h) of this AD, do detailed inspections for scribe lines of affected lap and butt splices, wing-to-body fairing locations, and external repair and cutout reinforcement areas, and do all applicable related investigative and corrective actions, by accomplishing all actions specified in the Accomplishment Instructions of Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, except as provided by paragraph (i) of this AD.
Note 1 to paragraph (g) of this AD: The inspection exemptions noted in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, apply to this AD, provided that the operator meets the requirements stated in each applicable exemption.
Where Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, specifies a compliance time after the date on that revision or any previous issue of Boeing Service Bulletin 747-53A2563, this AD requires compliance within the specified compliance time after the effective date of this AD. Where Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, states that airplane flight-cycle time shall be calculated after the “issue date on this service bulletin,” this AD requires the airplane flight-cycle time to be calculated as of the effective date of this AD.
Where Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, specifies to contact Boeing for appropriate action, accomplish applicable actions before further flight using a method approved in accordance with the procedures specified in paragraph (m) of this AD.
At the applicable time specified in paragraph (j)(1) or (j)(2) of this AD: Submit a report of the findings (both positive and negative) of the inspections required by paragraphs (g) and (k) of this AD. Send the report to Boeing Commercial Airplanes, P.O. Box 3707, Seattle, Washington 98124-2207. The report must contain, at a minimum, the inspection results, a description of any discrepancies including maximum scribe depth, the airplane serial number, and the number of flight cycles and flight hours on the airplane. Under the provisions of the Paperwork Reduction Act (44 U.S.C. 3501 et seq.), the Office of Management and Budget (OMB) has approved the information collection requirements contained in this AD and has assigned OMB Control Number 2120-0056. A report is not required for any inspection accomplished in accordance with the Limited Return to Service (LRTS) program.
(1) If the inspection was done on or after the effective date of this AD: Submit the report within 30 days after the inspection.
(2) If the inspection was done before the effective date of this AD: Submit the report within 30 days after the effective date of this AD.
For airplanes that have been inspected before the effective date of this AD in accordance with the service information specified in table 1 of this AD: At the applicable times specified in Tables 22 through 24 and Tables 26 through 29 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, except as provided in paragraph (h) of this AD, do detailed inspections for scribe lines of affected lap splices, butt splices and cargo door lap splices; and do detailed and surface high frequency eddy current or ultrasonic inspections of scribe lines; and do all applicable related investigative and corrective actions; by accomplishing all the applicable actions specified in the Accomplishment Instructions of Boeing Service Bulletin 747-53A2563, Revision 4, dated May 6, 2010, except as provided by paragraph (i) of this AD.
| Document | Revision | Date |
|---|---|---|
| Boeing Alert Service Bulletin 747-53A2563 | Original | March 29, 2007. |
| Boeing Service Bulletin 747-53A2563 | 2 | January 3, 2008. |
| Boeing Service Bulletin 747-53A2563 | 3 | June 11, 2009. |
Note 2 to paragraph (k) of this AD: Boeing Alert Service Bulletin 747-53A2563, Revision 1, dated November 8, 2007, was published with omitted information. Actions accomplished according to Boeing Alert Service Bulletin 747-53A2563, Revision 1, dated November 8, 2007, are not considered acceptable for compliance with this AD.
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
