Airworthiness Directive · Amendment 39-18155 · Flight controls
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 767-200, -300, and -400ER series airplanes, certificated in any category, as identified in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014.
We are superseding Airworthiness Directive (AD) 2004-07-11 for all The Boeing Company Model 767-400ER series airplanes. AD 2004-07-11 requires repetitive high frequency eddy current (HFEC) inspections of the aft lower lugs of the deflection control track of the outboard flap for cracks, and replacement of any cracked deflection control track with a new track assembly. This AD retains those requirements, provides optional terminating action for the repetitive inspections, and adds airplane models to the applicability. This AD was prompted by our determination that additional airplane models require repetitive HFEC inspections of the aft lower lugs of the deflection control track of the outboard flap for cracks, and replacement of any cracked deflection control track with a new track assembly. We are issuing this AD to detect and correct fatigue cracking in the aft lower lug run-out region of the deflection control track, which could result in the loss of the secondary load path for the outboard flap, resulting in the loss of the outboard flap and consequent reduced controllability of the airplane in the event that the primary load path also fails.
This paragraph restates the requirements of paragraph (a) of AD 2004-07-11, Amendment 39-13555 (69 FR 17911, April 6, 2004), with revised service information. For airplanes identified in Group 1 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: Before the accumulation of 12,000 total flight cycles, or within 1,200 flight cycles after May 11, 2004 (the effective date of AD 2004-07-11), whichever occurs later, perform an HFEC inspection for cracks in the aft lower lug of the deflection control track on the outboard flap, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767-27A0183, dated May 9, 2002; or Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014. As of the effective date of this AD, only Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014, may be used.
This paragraph restates the requirements of paragraph (b) of AD 2004-07-11, Amendment 39-13555 (69 FR 17911, April 6, 2004), with new service information. For airplanes identified in Group 1 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: If no crack is detected during any HFEC inspection required in paragraph (g) of this AD, repeat the inspection at intervals not to exceed 1,200 flight cycles.
This paragraph restates the requirements of paragraph (c) of AD 2004-07-11, Amendment 39-13555 (69 FR 17911, April 6, 2004), with revised service information, added terminating action, and added paragraph reference. For airplanes identified in Group 1 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: If any crack is detected during any HFEC inspection required by paragraph (g) or (h) of this AD, before further flight, replace the deflection control track with a new track assembly, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin 767-27A0183, dated May 9, 2002; or Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014. Within 12,000 flight cycles following the replacement of deflection control track with a deflection control track, part number (P/N) 113T7333-3 or 113T8333-7, perform the HFEC inspection specified in paragraph (g) of this AD, and repeat inspections as specified in paragraph (h) of this AD until the deflection control track is replaced with a deflection control track, P/N 113T8333-9, as specified in paragraph (m) of this AD. As of the effective date of this AD, only Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014, may be used.
For airplanes identified in Group 2 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: Before the accumulation of 12,000 total flight cycles, or within 1,200 flight cycles after the effective date of this AD, whichever occurs later, do an HFEC inspection for cracks in the aft lower lug of the deflection control track on the outboard flap, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014.
For airplanes identified in Group 2 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: If no crack is detected during any HFEC inspection required in paragraph (j) of this AD, repeat the inspection thereafter at intervals not to exceed 1,200 flight cycles.
For airplanes identified in Group 2 in Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014: If any crack is detected during any HFEC inspection required by paragraph (j) or (k) of this AD, before further flight, replace the deflection control track with a new track assembly, part number 113T8333-9, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014. This replacement terminates the inspection requirements of paragraphs (j) and (k) of this AD.
Replacement of the deflection control track with a new track assembly, P/N 113T8333- 9, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 767-27A0183, Revision 2, dated September 25, 2014, terminates the inspection requirements of paragraphs (g), (h), (j), and (k) of this AD.
