Airworthiness directives › 2013-18-02
AD 2013-18-02 Airworthiness Directives; the Boeing Company Airplanes
Models named: 767-200, 767-300, 767-300F, 767-400ER series. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
(1) This AD applies to The Boeing Company Model 767-200, 767-300, 767-300F, and 767-400ER series airplanes; certificated in any category; as identified in Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013. (2) Installation of Supplemental Type Certificate (STC) ST01920SE ( http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgstc.nsf/0/59027f43b9a7486e86257b1d006591ee/ $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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For Group 1 airplanes, as specified in Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013: Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013, do a detailed inspection of the cap seal for damaged sealant on the nuts common to outboard flap support rib numbers 1, 2, 7, and 8, and do all applicable related investigative and corrective actions, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013. Do all applicable related investigative and corrective actions before further flight, except as specified in paragraphs (g)(1)(ii) and (g)(2)(ii) of this AD. (1) If, during any detailed inspection of the cap seal required by paragraph (g) of this AD, no damaged sealant is found on any support rib, do the actions specified in paragraphs (g)(1)(i) and (g)(1)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013, until all fasteners are replaced within that support rib as required by paragraph (g)(1)(ii) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013: Replace all fasteners within the support rib, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013. (2) If, during any related investigative action required by paragraph (g) of this AD, no cracking and no corrosion is found on the nut, bolt, and washers of any support rib, do the actions specified in paragraphs (g)(2)(i) and (g)(2)(ii) of this AD. (i) Repeat the detailed inspection of the cap seal on that support rib thereafter at the intervals specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013, until all fasteners are replaced within that support rib as required by paragraph (g)(2)(ii) of this AD. (ii) Except as required by paragraph (j) of this AD, at the time specified in table 1 of paragraph 1.E., “Compliance,” of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013: Replace all fasteners within the support rib, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-57A0131, Revision 1, dated May 8, 2013.
Unsafe condition
This AD was prompted by reports of cracked and corroded nuts on an outboard flap support rib. We are issuing this AD to detect and correct cracked and corroded nuts and bolts and the installation of incorrect nuts on certain outboard flap support ribs, which could lead to additional nut and bolt damage in the joint, result in loss of an outboard flap, and adversely affect continued safe flight and landing of the airplane.
Affected ADs
None.
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