Airworthiness Directive · Amendment 39-17618 · Landing gear
The Boeing Company Airplanes
(1) This AD applies to The Boeing Company Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category, as identified in Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012.
(2) Installation of Supplemental Type Certificate (STC) ST01920SE (http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/082838ee177dbf62862576a4005cdfc0/$FILE/ST01920SE.pdf) does not affect the ability to accomplish the actions required by this AD. Therefore, for airplanes on which STC ST01920SE is installed, a “change in product” alternative method of compliance (AMOC) approval request is not necessary to comply with the requirements of 14 CFR 39.17.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 767 airplanes. This AD was prompted by reports of cracks and heat damage on pivot joint components found during main landing gear (MLG) overhaul. This AD requires, for certain airplanes, repetitive inspections of the MLG pivots, truck beam bushings, and inner cylinder bushings. For all airplanes, this AD requires a maintenance program revision, one-time inspections of the MLG truck beam, and related investigative and corrective actions (including configuration changes) if necessary; accomplishment of these actions terminates the repetitive inspections. We are issuing this AD to detect and correct heat damage and cracks in the pivot pin, truck beam lugs, and inner cylinder lugs, which could result in fracture of the pivot joint components and consequent MLG collapse.
At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, except as provided by paragraph (j) of this AD, revise the maintenance program to incorporate the specified maintenance review board (MRB) item, in accordance with Part 1 of the Accomplishment Instructions of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012.
For airplanes identified as Group 1 in Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012: At the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, except as provided by paragraph (j) of this AD, do a detailed inspection to detect discrepancies (including bronze transfer, heat discoloration, darkened streaks, thermal spray coating distress, wear, cracking, smearing of material into the lubrication grooves, or grease not appearing in the bushing inner diameters when applied through the lube fittings) of the MLG pivot pins, truck beam bushings, and inner cylinder bushings, and do all applicable corrective actions, in accordance with Part 2 of the Accomplishment Instructions of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012. Do all applicable corrective actions before further flight. Repeat the inspection thereafter at the applicable times specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012.
For all airplanes: At the applicable time specified in paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, except as provided by paragraph (j) of this AD, inspect the MLG truck beam and inner cylinders, using a detailed inspection, etch inspection, and fluorescent penetrant inspection (FPI), as applicable, to detect applicable discrepancies, and do all applicable related investigative and corrective actions (including configuration changes), in accordance with Part 3 of the Accomplishment Instructions of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012. Do all applicable related investigative and corrective actions before further flight. Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, provides options for accomplishing certain corrective actions.
Where Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, specifies a compliance time “after the original issue date of this service bulletin,” this AD requires compliance within the specified compliance time after the effective date of this AD.
(1) Accomplishment of the actions required by paragraphs (g) and (i) of this AD terminates the requirements of paragraph (h) of this AD.
(2) Overhaul of the MLG and installation of truck beam and inner cylinder bushings having applicable part numbers identified in Appendix “B” of Boeing Service Bulletin 767-32A0227, Revision 1, dated September 13, 2012, terminate the requirements of paragraphs (h) and (i) of this AD, if the actions are done using a method approved in accordance with the procedures specified in paragraph (n) of this AD.
After accomplishing the revision required by paragraph (g) of this AD, no alternative actions (e.g., inspections) or intervals may be used unless the actions or intervals are approved as an AMOC in accordance with the procedures specified in paragraph (n) of this AD.
