Airworthiness Directive · Amendment 39-14834 · Boeing Model 747 Airplanes
Boeing Model 747 Airplanes
This AD applies to Boeing 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, certificated in any category; as identified in Boeing Alert Service Bulletin 747-53A2675, dated October 12, 2006.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747 airplanes. This AD requires repetitive inspections for any cracking of the fuselage skin in section 41 of the airplane, and related investigative and corrective actions if necessary. This AD results from a report of fatigue cracks found in the skin in section 41 of the fuselage, on an in-service Model 747 airplane. We are issuing this AD to detect and correct fatigue cracks at the fastener rows of the fuselage skin in section 41, which could join together and cause a loss of structural integrity and rapid 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 compliance time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 747-53A2675, dated October 12, 2006, do the applicable inspection for any cracking of the fuselage skin in the section 41 area, and do all applicable related investigative and corrective actions, by accomplishing all the actions specified in the Accomplishment Instructions of Boeing Alert Service Bulletin 747-53A2675, dated October 12, 2006, except as provided by paragraphs (g) and (h) of this AD. Repeat the applicable inspection at intervals not to exceed those specified in paragraph 1.E. of the service bulletin. If any crack is found, do all applicable related investigative and corrective actions before further flight.
(g) Where Boeing Alert Service Bulletin 747-53A2675, dated October 12, 2006, recommends an initial inspection threshold relative to the date on the service bulletin, this AD requires the initial inspection threshold relative to the effective date of this AD.
(h) If any crack is found during any inspection required by this AD, and Boeing Alert Service Bulletin 747-53A2675, dated October 12, 2006, specifies to contact Boeing for appropriate action: Before further flight, repair the cracking using a method approved in accordance with the procedures specified in paragraph (j) of this AD.
(i) Submit a report of the findings (both positive and negative) of the inspections required by paragraph (f) of this AD to Boeing Commercial Airplanes Group, Attention: Manager, Airline Support, P.O. Box 3707, Seattle, Washington 98124-2207, at the applicable time specified in paragraph (i)(1) or (i)(2) of this AD. The report must include the inspection results, a description of any discrepancies/crack found, the airplane serial number, and the number of landings 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.
(1) For each inspection done after the effective date of this AD: Submit the report within 10 days after the inspection.
(2) For each inspection accomplished prior to the effective date of this AD: Submit the report within 10 days after the effective date of this AD.
