Airworthiness Directive · Amendment 39-14846 · Boeing Model 777 Airplanes
Boeing Model 777 Airplanes
This AD applies to Boeing Model 777-200, -300, and -300ER series airplanes; certificated in any category; as identified in Boeing Service Bulletin 777-53A0044, Revision 1, dated June 22, 2006.
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 777 airplanes. This AD requires repetitive inspections for corrosion or missing corrosion inhibiting compound of the fuselage skin under the forward and aft wing-to-body fairings for certain airplanes, or the fuselage skin under the forward wing-to-body fairings only for other airplanes; and corrective action if necessary. The AD also provides an optional preventive modification of the fairing areas, which terminates the repetitive inspections. This AD results from several reports indicating that significant levels of corrosion were found on the external surface of the fuselage skin under the forward and aft wing-to-body fairings. We are issuing this AD to detect and correct corrosion, and prevent subsequent fatigue cracks, on the fuselage skin under the forward and aft wing-to-body fairings, which could result in 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 latest of the compliance times specified in paragraphs (f)(1), (f)(2), and (f)(3) of this AD, as applicable: Perform a detailed inspection of the fuselage skin under the wing-to-body fairings for corrosion or missing corrosion inhibiting compound (CIC) by doing all the applicable actions specified in Part 1 of the Accomplishment Instructions of Boeing Alert Service Bulletin 777-53A0044, dated July 28, 2005; or Boeing Service Bulletin 777-53A0044, Revision 1, dated June 22, 2006. Repeat the inspection thereafter at intervals not to exceed 1,500 days until the requirements of paragraph (h) of this AD are accomplished.
(1) Before the accumulation of 1,500 days since the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness.
(2) Within 1,500 days after accomplishing the latest zonal or surveillance inspection before the effective date of this AD that is equivalent to the detailed inspection specified in paragraph (f) of this AD.
(3) Within 750 days after the effective date of this AD.
If any corrosion or missing CIC is found during any inspection required by paragraph (f) of this AD: Before further flight, do a detailed inspection to determine the full extent of the corrosion; repair before further flight by doing all the applicable actions specified in Part 1 of the Accomplishment Instructions of Boeing Alert Service Bulletin 777-53A0044, dated July 28, 2005; or Boeing Service Bulletin 777-53A0044, Revision 1, dated June 22, 2006. Where the service bulletin specifies to contact Boeing for repair instructions: Repair before further flight, according to a method approved in accordance with the procedures specified in paragraph (i) of this AD.
Accomplishing the preventive modification of the fairing areas in accordance with Part 2 of the Accomplishment Instructions of Boeing Alert Service Bulletin 777-53A0044, dated July 28, 2005; or Boeing Service Bulletin 777-53A0044, Revision 1, dated June 22, 2006; terminates the repetitive inspections required by paragraph (f) of this AD. After the effective date of this AD, only Revision 1 of the service bulletin may be used for accomplishing the preventive modification.
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
