Airworthiness Directive · Amendment 39-19826 · Flight controls
The Boeing Company Airplanes
This AD applies to all The Boeing Company Model 787 series airplanes, certificated in any category.
The FAA is superseding Airworthiness Directive (AD) 2017-15- 04, which applied to certain The Boeing Company Model 787-8 and 787-9 airplanes. AD 2017-15-04 required replacement of affected electromechanical actuators (EMAs). This AD retains the requirements of AD 2017-15-04; expands the applicability to include all The Boeing Company Model 787 series airplanes; and adds a new requirement to identify, for certain airplanes, the part number of EMAs and to replace affected EMAs. This AD was prompted by wire harness chafing on the EMAs for certain spoilers due to insufficient separation with adjacent structure. The FAA is issuing this AD to address the unsafe condition on these products.
This paragraph restates the requirements of paragraph (g) of AD 2017-15-04, with revised compliance language. For airplanes identified in Boeing Service Bulletin B787-81205-SB270030-00, Issue 001, dated October 22, 2015: Within 40 months after August 25, 2017 (the effective date of AD 2017-15-04), replace the EMAs with new EMAs, in accordance with the Accomplishment Instructions of Boeing Service Bulletin B787-81205-SB270030-00, Issue 001, dated October 22, 2015; or Boeing Alert Service Bulletin B787-81205-SB270030-00, Issue 002, dated April 7, 2017.
For the purpose of this AD, an “affected part” is an EMA for spoiler 4, 5, 10, or 11 having part number (P/N) C99144-004 or C99144-005.
For airplanes not identified in paragraph (g) of this AD with an original airworthiness certificate or an original export certificate of airworthiness dated before or on the effective date of this AD, do the actions specified in paragraphs (i)(1) and (2) of this AD.
(1) Within 40 months after the effective date of this AD, perform a general visual inspection of the EMAs for spoilers 4, 5, 10, and 11 to determine the part number. A review of airplane maintenance records is acceptable in lieu of this inspection if the part number of the EMA can be conclusively determined from that review.
(2) If the EMA is an affected part: Within 40 months after the effective date of this AD, replace the EMA in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB270030-00, Issue 002, dated April 7, 2017.
