Airworthiness Directive · Amendment 39-19716 · Fuel
The Boeing Company Airplanes
This AD applies to The Boeing Company Model 777-200 and -300 series airplanes, certificated in any category, as identified in Boeing Special Attention Service Bulletin 777-28-0082, Revision 2, dated May 31, 2019.
We are adopting a new airworthiness directive (AD) for certain The Boeing Company Model 777-200 and -300 series airplanes. This AD was prompted by reports of unreliable performance of the water and fuel scavenge system; failure of the fuel scavenge function can cause trapped fuel, resulting in unavailable fuel reserves. This AD requires incorporating operating limitations; or modifying the water and fuel scavenge systems in the fuel tanks, modifying the fuel jettison system, making electrical changes in the main equipment center, modifying the wiring in certain panels, and installing new software. We are issuing this AD to address the unsafe condition on these products.
Within 36 months after the effective date of this AD: Revise the operating limitations in the documents specified in paragraphs (g)(1) and (2) of this AD to include the text in figure 1 to paragraph (g) of this AD.
(1) “Fuel System—Loading” section of the “Certificate Limitations” section of the FAA-approved Boeing Model 777 Airplane Flight Manual.
(2) “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.
Modifying the fuel tank fuel and water scavenge systems, modifying the fuel jettison system, making electrical changes in the main equipment center, modifying the wiring in the electrical load management system (ELMS) P110 and P210 panels, and installing new ELMS1 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 777-28-0082, Revision 2, dated May 31, 2019, is an optional terminating action to the requirements of paragraph (g) of this AD.
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
