Airworthiness Directive · Amendment 39-19328 · Fuel
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200LR series airplanes, certificated in any category, variable numbers (V/Ns) WD011 through WD015 inclusive, WD016 through WD018 inclusive, and WD049 through WD053 inclusive.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200LR series airplanes. This AD requires revising certain documents to provide revised operating limitations. For certain airplanes, modification of the water and fuel scavenge systems in the fuel tanks, electrical changes in the main equipment center, and installation of new electrical load management system (ELMS2) software is an acceptable alternative to the documents revision. This AD was prompted by reports of unreliable performance of the water and fuel scavenge systems. We are issuing this AD to address the unsafe condition on these products.
Except as provided by paragraph (h) of this AD: Within 36 months after the effective date of this AD, revise the applicable section of the documents specified in paragraphs (g)(1) and (g)(2) of this AD to include the information specified in figure 1 to the introductory text of paragraph (g) of this AD.
(1) Insert the information specified in figure 1 to the introductory text of paragraph (g) of this AD into the “Fuel-System—Loading” section of the “Certificate Limitations” section of the FAA-approved Boeing Model 777 Airplane Flight Manual.
(2) Insert the information specified in figure 1 to the introductory text of paragraph (g) of this AD into the “Loading Limitations” section of the “Fuel Loading Procedures” section of the “Fuel Management” section of the FAA-approved Boeing Model 777 Weight and Balance Control and Loading Manual.
For airplane V/Ns WD049 through WD053 inclusive, and WD011 through WD015 inclusive: Accomplishment of the actions specified in paragraphs (h)(1) and (h)(2) of this AD terminates the requirements of paragraph (g) of this AD.
(1) Remove the auxiliary fuel tanks in accordance with step 1. of the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-28-0078, Revision 3, dated December 19, 2017.
(2) Modify the water and fuel scavenge systems in the fuel tanks, make electrical changes in the main equipment center, and install new electrical load management system (ELMS2) software, by doing all applicable actions identified as “RC” (required for compliance) in, and in accordance with, the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-28-0078, Revision 3, dated December 19, 2017.
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
