Airworthiness Directive · Amendment 39-18585 · Water/waste
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 787-8 series airplanes, certificated in any category, as identified in the service information specified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD.
(1) Boeing Alert Service Bulletin B787-81205-SB380009-00, Issue 002, dated December 9, 2015.
(2) Boeing Alert Service Bulletin B787-81205-SB530029-00, Issue 002, dated January 26, 2016.
(3) Boeing Alert Service Bulletin B787-81205-SB530031-00, Issue 002, dated March 16, 2016.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 787-8 airplanes. This AD was prompted by reports of water leakage from the potable water system due to improperly installed waterline couplings, and water leaking into the electronics equipment (EE) bays from above the floor in the main cabin, resulting in water on the equipment in the EE bays. This AD requires replacing the potable waterline couplings above the forward and aft EE bays with new, improved couplings. This AD also requires sealing the main cabin floor areas above the aft EE bay, installing drip shields and foam blocks, and rerouting the wire bundles near the drip shields above the equipment in the aft EE bay. We are issuing this AD to prevent a water leak from an improperly installed potable water system coupling, or main cabin water source, which could cause the equipment in the EE bays to become wet, resulting in an electrical short and potential loss of system functions essential for safe flight.
Within 24 months after the effective date of this AD: Replace the existing potable waterline couplings located above the forward and aft EE bays with new, improved couplings, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB380009-00, Issue 002, dated December 9, 2015. Before further flight after doing the replacement, do a potable water system leak test and repair any leaks found before further flight, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB380009-00, Issue 002, dated December 9, 2015.
Within 60 months after the effective date of this AD: Do the actions specified in paragraphs (h)(1) and (h)(2) of this AD.
(1) Apply sealant to the main cabin floor areas located above the aft EE bay, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB530029-00, Issue 002, dated January 26, 2016.
(2) Install drip shields and foam blocks, and reroute the wire bundles above the equipment in the aft EE bay, in accordance with the Accomplishment Instructions of Boeing Alert Service Bulletin B787-81205-SB530031-00, Issue 002, dated March 16, 2016, except as specified in paragraph (i) of this AD.
Where Boeing Alert Service Bulletin B787-81205-SB530031-00, Issue 002, dated March 16, 2016, specifies “Group 6, Configuration 1” airplanes in reference to Task 29, the correct airplane group identification is “Group 7, Configuration 1” airplanes.
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
