Airworthiness Directive · Amendment 39-16667 · Fuel
The Boeing Company Model 777-200, -300, and -300ER Series Airplanes
The Boeing Company Model 777-200, -300, and -300ER series airplanes; certificated in any category; as identified in Boeing Service Bulletin 777-28A0047, Revision 5, dated September 20, 2010.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD requires installing an auto shutoff feature for the center override/jettison fuel pumps, and installing power control circuitry for the center override/jettison and main jettison fuel pumps. This AD also requires installing new software in the electrical load management system (ELMS) electronics units in certain power management panels; installing airplane information management system 2 (AIMS-2) software in the AIMS-2 hardware; and making certain wiring changes. This AD was prompted by results from fuel system reviews conducted by the manufacturer. We are issuing this AD to prevent potential ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
Comply with this AD within the compliance times specified, unless already done.
For airplanes in Groups 1 and 2, Configuration 2, as identified in Boeing Service Bulletin 777-28A0047, Revision 5, dated September 20, 2010: Within 36 months after the effective date of this AD, install a new P301 panel on the left side of the airplane, install a new P302 panel on the right side of the airplane, and change the wiring, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0047, Revision 5, dated September 20, 2010, except as required by paragraphs (m) and (n) of this AD.
(h) For airplanes in Groups 1 and 2, Configuration 1, as identified in Boeing Service Bulletin 777-28A0047, Revision 5, dated September 20, 2010: Within 36 months after the effective date of this AD, perform bonding resistance measurements and rework the airplane installation as applicable, depending on airplane configuration, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0047, Revision 5, dated September 20, 2010.
(i) Prior to or concurrently with accomplishing the requirements of paragraph (g) of this AD, do the actions specified in paragraphs (i)(1), (i)(2), (i)(3), and (i)(4) of this AD.
(1) Install new software in the electrical load management system (ELMS) electronics units in the P110, P210, and P310 power management panels, in accordance with the Accomplishment Instructions of Boeing Service Bulletin 777-28A0040, Revision 1, dated March 18, 2010.
(2) Install airplane information management system 2 (AIMS-2) software in the AIMS-2 hardware, in accordance with the Accomplishment Instructions of Boeing Special Attention Service Bulletin 777-31-0097, Revision 3, dated February 22, 2007.
(3) Modify the P110 left power management panel by incorporating wiring changes, in accordance with the Accomplishment Instructions of GE Aviation Service Bulletin 5000ELM-28-456, Revision 1, dated January 7, 2010, except as provided by paragraphs (m) and (n) of this AD.
(4) Modify the P210 right power management panel by incorporating wiring changes, in accordance with the Accomplishment Instructions of GE Aviation Service Bulletin 6000ELM-28-457, Revision 1, dated January 7, 2010, except as provided by paragraphs (m) and (n) of this AD.
Installations done before the effective date of this AD in accordance with Boeing Alert Service Bulletin 777-28A0040, dated April 13, 2007, are acceptable for compliance with the requirements of paragraph (i)(1) of this AD.
(k) Installations done before the effective date of this AD in accordance with Boeing Service Bulletin 777-28A0047, Revision 3, dated June 11, 2009; or Revision 4, dated May 20, 2010; are acceptable for compliance with the requirements of paragraphs (g) and (h) of this AD.
(l) Installations done before the effective date of this AD in accordance with Boeing Special Attention Service Bulletin 777-31-0097, dated March 30, 2006; Revision 1, dated August 10, 2006; or Revision 2, dated October 26, 2006; are acceptable for compliance with the requirements of paragraph (i)(2) of this AD.
Where paragraph 2.A.(16) and Figure 8 of GE Aviation Service Bulletins 5000ELM-28-456 and 6000ELM-28-457, both Revision 1, both dated January 7, 2010, identify the installation of conical springs for the relay to relay base fixing, installation of spring washers is an acceptable method of compliance when they are part of the existing relay assembly.
(n) Where paragraphs 2.A.(24) and 2.A.(25) of GE Aviation Service Bulletins 5000ELM-28-456 and 6000ELM-28-457, both Revision 1, both dated January 7, 2010, specify the installation of a label to identify work carried out and to identify the appropriate service bulletin, an acceptable method of compliance is to use a suitable method to indelibly mark the appropriate service bulletin number on the reworked panel. Boeing Standard BAC5307 may be used as an additional source of guidance for part marking.
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
