Airworthiness Directive · Amendment 39-17049 · Doors
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200, -200LR, -300, -300ER, and 777F series airplanes; certificated in any category; as identified in Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777 airplanes. This AD was prompted by reports of fractured and missing latch pin retention bolts that secure the latch pins on the forward cargo door. This AD requires repetitive detailed inspections for fractured or missing latch pin retention bolts, replacement of existing titanium bolts with new Inconel bolts, and related investigative and corrective actions if necessary. We are issuing this AD to detect and correct fractured and missing latch pin retention bolts, which could result in potential separation of the cargo door from the airplane and catastrophic decompression of the airplane.
At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, except as specified in paragraph (i) of this AD: Do a detailed inspection for fractured and/or missing latch pin retention bolts of the latch pin fittings of the lower sill of the forward large cargo door, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, except as provided by paragraph (h) of this AD. Do all applicable related investigative and corrective actions at the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010. Repeat the inspection thereafter at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, except as specified in paragraph (j) of this AD.
If any cut, crack, or damage is found during any inspection required by this AD, and Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, specifies to contact Boeing for appropriate action: Before further flight, repair the cut, crack, or damage in accordance with a method approved by the Manager, Seattle, Aircraft Certification Office (ACO), FAA. For a repair method to be approved, the repair must meet the certification basis of the airplane, and the approval must specifically refer to this AD.
Where Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, specifies a compliance time after the date on that service bulletin, this AD requires compliance within the specified compliance time after the effective date of this AD.
Replacing latch pin retention bolts made of titanium with new Inconel bolts, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 777-52A0038, Revision 1, dated June 24, 2010, terminates the repetitive inspections required by paragraph (g) of this AD at Stations 509.10, 522.75, 537.50, 554.30, 562.90, 579.70, 591.25, and 604.90, latch pin fittings No. 1 through No. 8.
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
