Airworthiness Directive · Amendment 39-18186 · Doors
The Boeing Company Airplanes
This AD applies to The Boeing Company airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, certificated in any category.
(1) Model 767-200, -300, -300F, and -400ER series airplanes, as identified in Boeing Service Bulletin 767-52A0100, Revision 3, dated January 19, 2015.
(2) Model 777-200, -200LR, -300, -300ER, and 777F series airplanes, as identified in Boeing Service Bulletin 777-52-0053, Revision 2, dated January 19, 2015.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model and 777 airplanes. This AD was prompted by reports of uncommanded door closure of a large lower lobe cargo door. This AD requires inspecting for part numbers and serial numbers of the rotary actuators of the forward and aft large lower lobe cargo doors, as applicable, and corrective action if necessary. We are issuing this AD to detect and correct rotary actuators made with a material having poor actuator gear wear characteristics, which could result in failure of the rotary actuators for the forward or aft large lower lobe cargo doors and subsequent uncommanded door closure, which could possibly result in fatal injury to people on the ground.
For Model 767-200, -300, -300F, and -400ER series airplanes: Within 30 months after the effective date of this AD, inspect each rotary actuator installed in the forward and aft large lower lobe cargo doors, as applicable, to determine the part number and serial number, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-52A0100, Revision 3, dated January 19, 2015; and Eaton Service Bulletin 692D100-52-4, Revision 3, dated August 14, 2014. Do the applicable corrective actions at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-52A0100, Revision 3, dated January 19, 2015, except as required by paragraph (i) of this AD. A review of maintenance records for the part number and serial number is acceptable in lieu of the inspection if the part and serial numbers of the rotary actuator can be conclusively determined from that review.
For Model 777-200, -200LR, -300, -300ER, and 777F series airplanes: Within 72 months after the effective date of this AD, inspect each rotary actuator installed in the forward and aft large lower lobe cargo doors, as applicable, to determine the part number and serial number, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-52-0053, Revision 2, dated January 19, 2015; and Eaton Service Bulletin 692D100-52-4, Revision 3, dated August 14, 2014. Do the applicable corrective actions at the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 777-52-0053, Revision 2, dated January 19, 2015, except as required by paragraph (i) of this AD. A review of maintenance records for the part number and serial number is acceptable in lieu of the inspection if the part and serial numbers of the rotary actuator can be conclusively determined from that review.
Where Boeing Service Bulletin 767-52A0100, Revision 3, dated January 19, 2015; and Boeing Service Bulletin 777-52-0053, Revision 2, dated January 19, 2015, specify a compliance time after the issue date “of this service bulletin,” this AD requires compliance within the specified compliance time after the effective date of 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
